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fs/btrfs/ioctl.c
118 KB
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/* * Copyright (C) 2007 Oracle. All rights reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public * License v2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this program; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 021110-1307, USA. */ #include <linux/kernel.h> #include <linux/bio.h> #include <linux/buffer_head.h> #include <linux/file.h> #include <linux/fs.h> |
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#include <linux/fsnotify.h> |
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#include <linux/pagemap.h> #include <linux/highmem.h> #include <linux/time.h> #include <linux/init.h> #include <linux/string.h> |
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#include <linux/backing-dev.h> |
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#include <linux/mount.h> |
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#include <linux/mpage.h> |
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#include <linux/namei.h> |
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#include <linux/swap.h> #include <linux/writeback.h> #include <linux/statfs.h> #include <linux/compat.h> #include <linux/bit_spinlock.h> |
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#include <linux/security.h> |
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#include <linux/xattr.h> |
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#include <linux/vmalloc.h> |
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#include <linux/slab.h> |
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#include <linux/blkdev.h> |
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#include <linux/uuid.h> |
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#include <linux/btrfs.h> |
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#include <linux/uaccess.h> |
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#include "ctree.h" #include "disk-io.h" #include "transaction.h" #include "btrfs_inode.h" |
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#include "print-tree.h" #include "volumes.h" |
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#include "locking.h" |
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#include "inode-map.h" |
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#include "backref.h" |
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#include "rcu-string.h" |
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#include "send.h" |
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#include "dev-replace.h" |
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#include "props.h" |
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#include "sysfs.h" |
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#ifdef CONFIG_64BIT /* If we have a 32-bit userspace and 64-bit kernel, then the UAPI * structures are incorrect, as the timespec structure from userspace * is 4 bytes too small. We define these alternatives here to teach * the kernel about the 32-bit struct packing. */ struct btrfs_ioctl_timespec_32 { __u64 sec; __u32 nsec; } __attribute__ ((__packed__)); struct btrfs_ioctl_received_subvol_args_32 { char uuid[BTRFS_UUID_SIZE]; /* in */ __u64 stransid; /* in */ __u64 rtransid; /* out */ struct btrfs_ioctl_timespec_32 stime; /* in */ struct btrfs_ioctl_timespec_32 rtime; /* out */ __u64 flags; /* in */ __u64 reserved[16]; /* in */ } __attribute__ ((__packed__)); #define BTRFS_IOC_SET_RECEIVED_SUBVOL_32 _IOWR(BTRFS_IOCTL_MAGIC, 37, \ struct btrfs_ioctl_received_subvol_args_32) #endif |
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static int btrfs_clone(struct inode *src, struct inode *inode, u64 off, u64 olen, u64 olen_aligned, u64 destoff); |
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/* Mask out flags that are inappropriate for the given type of inode. */ static inline __u32 btrfs_mask_flags(umode_t mode, __u32 flags) { if (S_ISDIR(mode)) return flags; else if (S_ISREG(mode)) return flags & ~FS_DIRSYNC_FL; else return flags & (FS_NODUMP_FL | FS_NOATIME_FL); } /* * Export inode flags to the format expected by the FS_IOC_GETFLAGS ioctl. */ static unsigned int btrfs_flags_to_ioctl(unsigned int flags) { unsigned int iflags = 0; if (flags & BTRFS_INODE_SYNC) iflags |= FS_SYNC_FL; if (flags & BTRFS_INODE_IMMUTABLE) iflags |= FS_IMMUTABLE_FL; if (flags & BTRFS_INODE_APPEND) iflags |= FS_APPEND_FL; if (flags & BTRFS_INODE_NODUMP) iflags |= FS_NODUMP_FL; if (flags & BTRFS_INODE_NOATIME) iflags |= FS_NOATIME_FL; if (flags & BTRFS_INODE_DIRSYNC) iflags |= FS_DIRSYNC_FL; |
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if (flags & BTRFS_INODE_NODATACOW) iflags |= FS_NOCOW_FL; if ((flags & BTRFS_INODE_COMPRESS) && !(flags & BTRFS_INODE_NOCOMPRESS)) iflags |= FS_COMPR_FL; else if (flags & BTRFS_INODE_NOCOMPRESS) iflags |= FS_NOCOMP_FL; |
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return iflags; } /* * Update inode->i_flags based on the btrfs internal flags. */ void btrfs_update_iflags(struct inode *inode) { struct btrfs_inode *ip = BTRFS_I(inode); inode->i_flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC); if (ip->flags & BTRFS_INODE_SYNC) inode->i_flags |= S_SYNC; if (ip->flags & BTRFS_INODE_IMMUTABLE) inode->i_flags |= S_IMMUTABLE; if (ip->flags & BTRFS_INODE_APPEND) inode->i_flags |= S_APPEND; if (ip->flags & BTRFS_INODE_NOATIME) inode->i_flags |= S_NOATIME; if (ip->flags & BTRFS_INODE_DIRSYNC) inode->i_flags |= S_DIRSYNC; } /* * Inherit flags from the parent inode. * |
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* Currently only the compression flags and the cow flags are inherited. |
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*/ void btrfs_inherit_iflags(struct inode *inode, struct inode *dir) { |
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unsigned int flags; if (!dir) return; flags = BTRFS_I(dir)->flags; |
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if (flags & BTRFS_INODE_NOCOMPRESS) { BTRFS_I(inode)->flags &= ~BTRFS_INODE_COMPRESS; BTRFS_I(inode)->flags |= BTRFS_INODE_NOCOMPRESS; } else if (flags & BTRFS_INODE_COMPRESS) { BTRFS_I(inode)->flags &= ~BTRFS_INODE_NOCOMPRESS; BTRFS_I(inode)->flags |= BTRFS_INODE_COMPRESS; } |
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if (flags & BTRFS_INODE_NODATACOW) { |
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BTRFS_I(inode)->flags |= BTRFS_INODE_NODATACOW; |
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if (S_ISREG(inode->i_mode)) BTRFS_I(inode)->flags |= BTRFS_INODE_NODATASUM; } |
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btrfs_update_iflags(inode); } static int btrfs_ioctl_getflags(struct file *file, void __user *arg) { |
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struct btrfs_inode *ip = BTRFS_I(file_inode(file)); |
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unsigned int flags = btrfs_flags_to_ioctl(ip->flags); if (copy_to_user(arg, &flags, sizeof(flags))) return -EFAULT; return 0; } |
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static int check_flags(unsigned int flags) { if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ FS_NOATIME_FL | FS_NODUMP_FL | \ FS_SYNC_FL | FS_DIRSYNC_FL | \ |
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FS_NOCOMP_FL | FS_COMPR_FL | FS_NOCOW_FL)) |
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return -EOPNOTSUPP; if ((flags & FS_NOCOMP_FL) && (flags & FS_COMPR_FL)) return -EINVAL; |
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return 0; } |
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static int btrfs_ioctl_setflags(struct file *file, void __user *arg) { |
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struct inode *inode = file_inode(file); |
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struct btrfs_inode *ip = BTRFS_I(inode); struct btrfs_root *root = ip->root; struct btrfs_trans_handle *trans; unsigned int flags, oldflags; int ret; |
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u64 ip_oldflags; unsigned int i_oldflags; |
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umode_t mode; |
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if (!inode_owner_or_capable(inode)) return -EPERM; |
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if (btrfs_root_readonly(root)) return -EROFS; |
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if (copy_from_user(&flags, arg, sizeof(flags))) return -EFAULT; |
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ret = check_flags(flags); if (ret) return ret; |
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ret = mnt_want_write_file(file); if (ret) return ret; |
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mutex_lock(&inode->i_mutex); |
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ip_oldflags = ip->flags; i_oldflags = inode->i_flags; |
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mode = inode->i_mode; |
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flags = btrfs_mask_flags(inode->i_mode, flags); oldflags = btrfs_flags_to_ioctl(ip->flags); if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { if (!capable(CAP_LINUX_IMMUTABLE)) { ret = -EPERM; goto out_unlock; } } |
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if (flags & FS_SYNC_FL) ip->flags |= BTRFS_INODE_SYNC; else ip->flags &= ~BTRFS_INODE_SYNC; if (flags & FS_IMMUTABLE_FL) ip->flags |= BTRFS_INODE_IMMUTABLE; else ip->flags &= ~BTRFS_INODE_IMMUTABLE; if (flags & FS_APPEND_FL) ip->flags |= BTRFS_INODE_APPEND; else ip->flags &= ~BTRFS_INODE_APPEND; if (flags & FS_NODUMP_FL) ip->flags |= BTRFS_INODE_NODUMP; else ip->flags &= ~BTRFS_INODE_NODUMP; if (flags & FS_NOATIME_FL) ip->flags |= BTRFS_INODE_NOATIME; else ip->flags &= ~BTRFS_INODE_NOATIME; if (flags & FS_DIRSYNC_FL) ip->flags |= BTRFS_INODE_DIRSYNC; else ip->flags &= ~BTRFS_INODE_DIRSYNC; |
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if (flags & FS_NOCOW_FL) { if (S_ISREG(mode)) { /* * It's safe to turn csums off here, no extents exist. * Otherwise we want the flag to reflect the real COW * status of the file and will not set it. */ if (inode->i_size == 0) ip->flags |= BTRFS_INODE_NODATACOW | BTRFS_INODE_NODATASUM; } else { ip->flags |= BTRFS_INODE_NODATACOW; } } else { /* * Revert back under same assuptions as above */ if (S_ISREG(mode)) { if (inode->i_size == 0) ip->flags &= ~(BTRFS_INODE_NODATACOW | BTRFS_INODE_NODATASUM); } else { ip->flags &= ~BTRFS_INODE_NODATACOW; } } |
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/* * The COMPRESS flag can only be changed by users, while the NOCOMPRESS * flag may be changed automatically if compression code won't make * things smaller. */ if (flags & FS_NOCOMP_FL) { ip->flags &= ~BTRFS_INODE_COMPRESS; ip->flags |= BTRFS_INODE_NOCOMPRESS; |
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ret = btrfs_set_prop(inode, "btrfs.compression", NULL, 0, 0); if (ret && ret != -ENODATA) goto out_drop; |
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} else if (flags & FS_COMPR_FL) { |
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const char *comp; |
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ip->flags |= BTRFS_INODE_COMPRESS; ip->flags &= ~BTRFS_INODE_NOCOMPRESS; |
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if (root->fs_info->compress_type == BTRFS_COMPRESS_LZO) comp = "lzo"; else comp = "zlib"; ret = btrfs_set_prop(inode, "btrfs.compression", comp, strlen(comp), 0); if (ret) goto out_drop; |
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} else { ip->flags &= ~(BTRFS_INODE_COMPRESS | BTRFS_INODE_NOCOMPRESS); |
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} |
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trans = btrfs_start_transaction(root, 1); |
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if (IS_ERR(trans)) { ret = PTR_ERR(trans); goto out_drop; } |
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btrfs_update_iflags(inode); |
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inode_inc_iversion(inode); |
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inode->i_ctime = CURRENT_TIME; |
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ret = btrfs_update_inode(trans, root, inode); |
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btrfs_end_transaction(trans, root); |
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out_drop: if (ret) { ip->flags = ip_oldflags; inode->i_flags = i_oldflags; } |
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out_unlock: mutex_unlock(&inode->i_mutex); |
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mnt_drop_write_file(file); |
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return ret; |
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} static int btrfs_ioctl_getversion(struct file *file, int __user *arg) { |
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struct inode *inode = file_inode(file); |
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return put_user(inode->i_generation, arg); } |
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static noinline int btrfs_ioctl_fitrim(struct file *file, void __user *arg) { |
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struct btrfs_fs_info *fs_info = btrfs_sb(file_inode(file)->i_sb); |
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struct btrfs_device *device; struct request_queue *q; struct fstrim_range range; u64 minlen = ULLONG_MAX; u64 num_devices = 0; |
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u64 total_bytes = btrfs_super_total_bytes(fs_info->super_copy); |
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int ret; if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
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rcu_read_lock(); list_for_each_entry_rcu(device, &fs_info->fs_devices->devices, dev_list) { |
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if (!device->bdev) continue; q = bdev_get_queue(device->bdev); if (blk_queue_discard(q)) { num_devices++; minlen = min((u64)q->limits.discard_granularity, minlen); } } |
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rcu_read_unlock(); |
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if (!num_devices) return -EOPNOTSUPP; |
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if (copy_from_user(&range, arg, sizeof(range))) return -EFAULT; |
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if (range.start > total_bytes || range.len < fs_info->sb->s_blocksize) |
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return -EINVAL; |
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range.len = min(range.len, total_bytes - range.start); |
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range.minlen = max(range.minlen, minlen); |
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ret = btrfs_trim_fs(fs_info->tree_root, &range); |
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if (ret < 0) return ret; if (copy_to_user(arg, &range, sizeof(range))) return -EFAULT; return 0; } |
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int btrfs_is_empty_uuid(u8 *uuid) { |
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int i; for (i = 0; i < BTRFS_UUID_SIZE; i++) { if (uuid[i]) return 0; } return 1; |
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} |
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static noinline int create_subvol(struct inode *dir, |
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struct dentry *dentry, |
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char *name, int namelen, |
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u64 *async_transid, |
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struct btrfs_qgroup_inherit *inherit) |
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{ struct btrfs_trans_handle *trans; struct btrfs_key key; struct btrfs_root_item root_item; struct btrfs_inode_item *inode_item; struct extent_buffer *leaf; |
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struct btrfs_root *root = BTRFS_I(dir)->root; |
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struct btrfs_root *new_root; |
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struct btrfs_block_rsv block_rsv; |
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struct timespec cur_time = CURRENT_TIME; |
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struct inode *inode; |
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int ret; int err; u64 objectid; u64 new_dirid = BTRFS_FIRST_FREE_OBJECTID; |
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u64 index = 0; |
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u64 qgroup_reserved; |
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uuid_le new_uuid; |
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ret = btrfs_find_free_objectid(root->fs_info->tree_root, &objectid); |
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if (ret) |
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return ret; |
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btrfs_init_block_rsv(&block_rsv, BTRFS_BLOCK_RSV_TEMP); |
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/* |
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* The same as the snapshot creation, please see the comment * of create_snapshot(). |
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*/ |
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ret = btrfs_subvolume_reserve_metadata(root, &block_rsv, |
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8, &qgroup_reserved, false); |
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if (ret) return ret; trans = btrfs_start_transaction(root, 0); if (IS_ERR(trans)) { ret = PTR_ERR(trans); |
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btrfs_subvolume_release_metadata(root, &block_rsv, qgroup_reserved); return ret; |
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} trans->block_rsv = &block_rsv; trans->bytes_reserved = block_rsv.size; |
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ret = btrfs_qgroup_inherit(trans, root->fs_info, 0, objectid, inherit); |
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if (ret) goto fail; |
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leaf = btrfs_alloc_free_block(trans, root, root->leafsize, |
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0, objectid, NULL, 0, 0, 0); |
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if (IS_ERR(leaf)) { ret = PTR_ERR(leaf); goto fail; } |
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memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); |
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btrfs_set_header_bytenr(leaf, leaf->start); btrfs_set_header_generation(leaf, trans->transid); |
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btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); |
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btrfs_set_header_owner(leaf, objectid); |
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write_extent_buffer(leaf, root->fs_info->fsid, btrfs_header_fsid(), |
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BTRFS_FSID_SIZE); |
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write_extent_buffer(leaf, root->fs_info->chunk_tree_uuid, |
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btrfs_header_chunk_tree_uuid(leaf), |
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BTRFS_UUID_SIZE); |
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btrfs_mark_buffer_dirty(leaf); |
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memset(&root_item, 0, sizeof(root_item)); |
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inode_item = &root_item.inode; |
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btrfs_set_stack_inode_generation(inode_item, 1); btrfs_set_stack_inode_size(inode_item, 3); btrfs_set_stack_inode_nlink(inode_item, 1); btrfs_set_stack_inode_nbytes(inode_item, root->leafsize); btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755); |
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btrfs_set_root_flags(&root_item, 0); btrfs_set_root_limit(&root_item, 0); btrfs_set_stack_inode_flags(inode_item, BTRFS_INODE_ROOT_ITEM_INIT); |
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btrfs_set_root_bytenr(&root_item, leaf->start); |
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btrfs_set_root_generation(&root_item, trans->transid); |
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btrfs_set_root_level(&root_item, 0); btrfs_set_root_refs(&root_item, 1); |
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btrfs_set_root_used(&root_item, leaf->len); |
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|
492 |
btrfs_set_root_last_snapshot(&root_item, 0); |
f46b5a66b
|
493 |
|
8ea05e3a4
|
494 495 496 497 |
btrfs_set_root_generation_v2(&root_item, btrfs_root_generation(&root_item)); uuid_le_gen(&new_uuid); memcpy(root_item.uuid, new_uuid.b, BTRFS_UUID_SIZE); |
3cae210fa
|
498 499 |
btrfs_set_stack_timespec_sec(&root_item.otime, cur_time.tv_sec); btrfs_set_stack_timespec_nsec(&root_item.otime, cur_time.tv_nsec); |
8ea05e3a4
|
500 501 502 |
root_item.ctime = root_item.otime; btrfs_set_root_ctransid(&root_item, trans->transid); btrfs_set_root_otransid(&root_item, trans->transid); |
f46b5a66b
|
503 |
|
925baeddc
|
504 |
btrfs_tree_unlock(leaf); |
f46b5a66b
|
505 506 507 508 509 510 |
free_extent_buffer(leaf); leaf = NULL; btrfs_set_root_dirid(&root_item, new_dirid); key.objectid = objectid; |
5d4f98a28
|
511 |
key.offset = 0; |
f46b5a66b
|
512 513 514 515 516 |
btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY); ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key, &root_item); if (ret) goto fail; |
76dda93c6
|
517 518 |
key.offset = (u64)-1; new_root = btrfs_read_fs_root_no_name(root->fs_info, &key); |
79787eaab
|
519 520 521 522 523 |
if (IS_ERR(new_root)) { btrfs_abort_transaction(trans, root, PTR_ERR(new_root)); ret = PTR_ERR(new_root); goto fail; } |
76dda93c6
|
524 525 |
btrfs_record_root_in_trans(trans, new_root); |
63541927c
|
526 |
ret = btrfs_create_subvol_root(trans, new_root, root, new_dirid); |
ce598979b
|
527 528 |
if (ret) { /* We potentially lose an unused inode item here */ |
79787eaab
|
529 |
btrfs_abort_transaction(trans, root, ret); |
ce598979b
|
530 531 |
goto fail; } |
f46b5a66b
|
532 533 534 |
/* * insert the directory item */ |
3de4586c5
|
535 |
ret = btrfs_set_inode_index(dir, &index); |
79787eaab
|
536 537 538 539 |
if (ret) { btrfs_abort_transaction(trans, root, ret); goto fail; } |
3de4586c5
|
540 541 |
ret = btrfs_insert_dir_item(trans, root, |
16cdcec73
|
542 |
name, namelen, dir, &key, |
3de4586c5
|
543 |
BTRFS_FT_DIR, index); |
79787eaab
|
544 545 |
if (ret) { btrfs_abort_transaction(trans, root, ret); |
f46b5a66b
|
546 |
goto fail; |
79787eaab
|
547 |
} |
0660b5af3
|
548 |
|
52c261799
|
549 550 551 |
btrfs_i_size_write(dir, dir->i_size + namelen * 2); ret = btrfs_update_inode(trans, root, dir); BUG_ON(ret); |
0660b5af3
|
552 |
ret = btrfs_add_root_ref(trans, root->fs_info->tree_root, |
4df27c4d5
|
553 |
objectid, root->root_key.objectid, |
33345d015
|
554 |
btrfs_ino(dir), index, name, namelen); |
76dda93c6
|
555 |
BUG_ON(ret); |
f46b5a66b
|
556 |
|
dd5f9615f
|
557 558 559 560 561 |
ret = btrfs_uuid_tree_add(trans, root->fs_info->uuid_root, root_item.uuid, BTRFS_UUID_KEY_SUBVOL, objectid); if (ret) btrfs_abort_transaction(trans, root, ret); |
f46b5a66b
|
562 |
fail: |
d5c120701
|
563 564 |
trans->block_rsv = NULL; trans->bytes_reserved = 0; |
de6e82006
|
565 |
btrfs_subvolume_release_metadata(root, &block_rsv, qgroup_reserved); |
72fd032e9
|
566 567 568 |
if (async_transid) { *async_transid = trans->transid; err = btrfs_commit_transaction_async(trans, root, 1); |
00d71c9c1
|
569 570 |
if (err) err = btrfs_commit_transaction(trans, root); |
72fd032e9
|
571 572 573 |
} else { err = btrfs_commit_transaction(trans, root); } |
f46b5a66b
|
574 575 |
if (err && !ret) ret = err; |
1a65e24b0
|
576 |
|
5662344b3
|
577 578 |
if (!ret) { inode = btrfs_lookup_dentry(dir, dentry); |
de6e82006
|
579 580 |
if (IS_ERR(inode)) return PTR_ERR(inode); |
5662344b3
|
581 582 |
d_instantiate(dentry, inode); } |
f46b5a66b
|
583 584 |
return ret; } |
8257b2dc3
|
585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 |
static void btrfs_wait_nocow_write(struct btrfs_root *root) { s64 writers; DEFINE_WAIT(wait); do { prepare_to_wait(&root->subv_writers->wait, &wait, TASK_UNINTERRUPTIBLE); writers = percpu_counter_sum(&root->subv_writers->counter); if (writers) schedule(); finish_wait(&root->subv_writers->wait, &wait); } while (writers); } |
e9662f701
|
601 602 603 604 |
static int create_snapshot(struct btrfs_root *root, struct inode *dir, struct dentry *dentry, char *name, int namelen, u64 *async_transid, bool readonly, struct btrfs_qgroup_inherit *inherit) |
f46b5a66b
|
605 |
{ |
2e4bfab97
|
606 |
struct inode *inode; |
f46b5a66b
|
607 608 |
struct btrfs_pending_snapshot *pending_snapshot; struct btrfs_trans_handle *trans; |
2e4bfab97
|
609 |
int ret; |
f46b5a66b
|
610 611 612 |
if (!root->ref_cows) return -EINVAL; |
8257b2dc3
|
613 614 615 |
atomic_inc(&root->will_be_snapshoted); smp_mb__after_atomic_inc(); btrfs_wait_nocow_write(root); |
6a03843df
|
616 617 |
ret = btrfs_start_delalloc_inodes(root, 0); if (ret) |
8257b2dc3
|
618 |
goto out; |
6a03843df
|
619 |
|
b02441999
|
620 |
btrfs_wait_ordered_extents(root, -1); |
6a03843df
|
621 |
|
3de4586c5
|
622 |
pending_snapshot = kzalloc(sizeof(*pending_snapshot), GFP_NOFS); |
8257b2dc3
|
623 624 625 626 |
if (!pending_snapshot) { ret = -ENOMEM; goto out; } |
a22285a6a
|
627 |
|
66d8f3dd1
|
628 629 |
btrfs_init_block_rsv(&pending_snapshot->block_rsv, BTRFS_BLOCK_RSV_TEMP); |
d5c120701
|
630 631 632 633 634 635 |
/* * 1 - parent dir inode * 2 - dir entries * 1 - root item * 2 - root ref/backref * 1 - root of snapshot |
dd5f9615f
|
636 |
* 1 - UUID item |
d5c120701
|
637 638 |
*/ ret = btrfs_subvolume_reserve_metadata(BTRFS_I(dir)->root, |
dd5f9615f
|
639 |
&pending_snapshot->block_rsv, 8, |
ee3441b49
|
640 641 |
&pending_snapshot->qgroup_reserved, false); |
d5c120701
|
642 |
if (ret) |
8257b2dc3
|
643 |
goto free; |
d5c120701
|
644 |
|
3de4586c5
|
645 |
pending_snapshot->dentry = dentry; |
f46b5a66b
|
646 |
pending_snapshot->root = root; |
b83cc9693
|
647 |
pending_snapshot->readonly = readonly; |
e9662f701
|
648 |
pending_snapshot->dir = dir; |
8696c5330
|
649 |
pending_snapshot->inherit = inherit; |
a22285a6a
|
650 |
|
d5c120701
|
651 |
trans = btrfs_start_transaction(root, 0); |
a22285a6a
|
652 653 654 655 |
if (IS_ERR(trans)) { ret = PTR_ERR(trans); goto fail; } |
8351583e3
|
656 |
spin_lock(&root->fs_info->trans_lock); |
f46b5a66b
|
657 658 |
list_add(&pending_snapshot->list, &trans->transaction->pending_snapshots); |
8351583e3
|
659 |
spin_unlock(&root->fs_info->trans_lock); |
72fd032e9
|
660 661 662 663 |
if (async_transid) { *async_transid = trans->transid; ret = btrfs_commit_transaction_async(trans, root->fs_info->extent_root, 1); |
00d71c9c1
|
664 665 |
if (ret) ret = btrfs_commit_transaction(trans, root); |
72fd032e9
|
666 667 668 669 |
} else { ret = btrfs_commit_transaction(trans, root->fs_info->extent_root); } |
aec8030a8
|
670 |
if (ret) |
c37b2b626
|
671 |
goto fail; |
a22285a6a
|
672 673 674 675 |
ret = pending_snapshot->error; if (ret) goto fail; |
66b4ffd11
|
676 677 678 |
ret = btrfs_orphan_cleanup(pending_snapshot->snap); if (ret) goto fail; |
f46b5a66b
|
679 |
|
2fbe8c8ad
|
680 |
inode = btrfs_lookup_dentry(dentry->d_parent->d_inode, dentry); |
2e4bfab97
|
681 682 683 684 |
if (IS_ERR(inode)) { ret = PTR_ERR(inode); goto fail; } |
5662344b3
|
685 |
|
2e4bfab97
|
686 687 688 |
d_instantiate(dentry, inode); ret = 0; fail: |
d5c120701
|
689 690 691 |
btrfs_subvolume_release_metadata(BTRFS_I(dir)->root, &pending_snapshot->block_rsv, pending_snapshot->qgroup_reserved); |
8257b2dc3
|
692 |
free: |
a22285a6a
|
693 |
kfree(pending_snapshot); |
8257b2dc3
|
694 695 |
out: atomic_dec(&root->will_be_snapshoted); |
f46b5a66b
|
696 697 |
return ret; } |
4260f7c75
|
698 699 700 701 702 703 |
/* copy of check_sticky in fs/namei.c() * It's inline, so penalty for filesystems that don't use sticky bit is * minimal. */ static inline int btrfs_check_sticky(struct inode *dir, struct inode *inode) { |
2f2f43d3c
|
704 |
kuid_t fsuid = current_fsuid(); |
4260f7c75
|
705 706 707 |
if (!(dir->i_mode & S_ISVTX)) return 0; |
2f2f43d3c
|
708 |
if (uid_eq(inode->i_uid, fsuid)) |
4260f7c75
|
709 |
return 0; |
2f2f43d3c
|
710 |
if (uid_eq(dir->i_uid, fsuid)) |
4260f7c75
|
711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 |
return 0; return !capable(CAP_FOWNER); } /* copy of may_delete in fs/namei.c() * Check whether we can remove a link victim from directory dir, check * whether the type of victim is right. * 1. We can't do it if dir is read-only (done in permission()) * 2. We should have write and exec permissions on dir * 3. We can't remove anything from append-only dir * 4. We can't do anything with immutable dir (done in permission()) * 5. If the sticky bit on dir is set we should either * a. be owner of dir, or * b. be owner of victim, or * c. have CAP_FOWNER capability * 6. If the victim is append-only or immutable we can't do antyhing with * links pointing to it. * 7. If we were asked to remove a directory and victim isn't one - ENOTDIR. * 8. If we were asked to remove a non-directory and victim isn't one - EISDIR. * 9. We can't remove a root or mountpoint. * 10. We don't allow removal of NFS sillyrenamed files; it's handled by * nfs_async_unlink(). */ |
678712545
|
734 |
static int btrfs_may_delete(struct inode *dir, struct dentry *victim, int isdir) |
4260f7c75
|
735 736 737 738 739 740 741 |
{ int error; if (!victim->d_inode) return -ENOENT; BUG_ON(victim->d_parent->d_inode != dir); |
4fa6b5ecb
|
742 |
audit_inode_child(dir, victim, AUDIT_TYPE_CHILD_DELETE); |
4260f7c75
|
743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 |
error = inode_permission(dir, MAY_WRITE | MAY_EXEC); if (error) return error; if (IS_APPEND(dir)) return -EPERM; if (btrfs_check_sticky(dir, victim->d_inode)|| IS_APPEND(victim->d_inode)|| IS_IMMUTABLE(victim->d_inode) || IS_SWAPFILE(victim->d_inode)) return -EPERM; if (isdir) { if (!S_ISDIR(victim->d_inode->i_mode)) return -ENOTDIR; if (IS_ROOT(victim)) return -EBUSY; } else if (S_ISDIR(victim->d_inode->i_mode)) return -EISDIR; if (IS_DEADDIR(dir)) return -ENOENT; if (victim->d_flags & DCACHE_NFSFS_RENAMED) return -EBUSY; return 0; } |
cb8e70901
|
766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 |
/* copy of may_create in fs/namei.c() */ static inline int btrfs_may_create(struct inode *dir, struct dentry *child) { if (child->d_inode) return -EEXIST; if (IS_DEADDIR(dir)) return -ENOENT; return inode_permission(dir, MAY_WRITE | MAY_EXEC); } /* * Create a new subvolume below @parent. This is largely modeled after * sys_mkdirat and vfs_mkdir, but we only do a single component lookup * inside this filesystem so it's quite a bit simpler. */ |
76dda93c6
|
781 782 |
static noinline int btrfs_mksubvol(struct path *parent, char *name, int namelen, |
72fd032e9
|
783 |
struct btrfs_root *snap_src, |
6f72c7e20
|
784 |
u64 *async_transid, bool readonly, |
8696c5330
|
785 |
struct btrfs_qgroup_inherit *inherit) |
cb8e70901
|
786 |
{ |
76dda93c6
|
787 |
struct inode *dir = parent->dentry->d_inode; |
cb8e70901
|
788 789 |
struct dentry *dentry; int error; |
5c50c9b89
|
790 791 792 |
error = mutex_lock_killable_nested(&dir->i_mutex, I_MUTEX_PARENT); if (error == -EINTR) return error; |
cb8e70901
|
793 794 795 796 797 798 799 800 801 |
dentry = lookup_one_len(name, parent->dentry, namelen); error = PTR_ERR(dentry); if (IS_ERR(dentry)) goto out_unlock; error = -EEXIST; if (dentry->d_inode) goto out_dput; |
76dda93c6
|
802 |
error = btrfs_may_create(dir, dentry); |
cb8e70901
|
803 |
if (error) |
a874a63e1
|
804 |
goto out_dput; |
cb8e70901
|
805 |
|
9c52057c6
|
806 807 808 809 810 811 812 813 814 |
/* * even if this name doesn't exist, we may get hash collisions. * check for them now when we can safely fail */ error = btrfs_check_dir_item_collision(BTRFS_I(dir)->root, dir->i_ino, name, namelen); if (error) goto out_dput; |
76dda93c6
|
815 816 817 818 |
down_read(&BTRFS_I(dir)->root->fs_info->subvol_sem); if (btrfs_root_refs(&BTRFS_I(dir)->root->root_item) == 0) goto out_up_read; |
3de4586c5
|
819 |
if (snap_src) { |
e9662f701
|
820 |
error = create_snapshot(snap_src, dir, dentry, name, namelen, |
6f72c7e20
|
821 |
async_transid, readonly, inherit); |
3de4586c5
|
822 |
} else { |
d5c120701
|
823 824 |
error = create_subvol(dir, dentry, name, namelen, async_transid, inherit); |
3de4586c5
|
825 |
} |
76dda93c6
|
826 827 828 829 |
if (!error) fsnotify_mkdir(dir, dentry); out_up_read: up_read(&BTRFS_I(dir)->root->fs_info->subvol_sem); |
cb8e70901
|
830 831 832 |
out_dput: dput(dentry); out_unlock: |
76dda93c6
|
833 |
mutex_unlock(&dir->i_mutex); |
cb8e70901
|
834 835 |
return error; } |
4cb5300bc
|
836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 |
/* * When we're defragging a range, we don't want to kick it off again * if it is really just waiting for delalloc to send it down. * If we find a nice big extent or delalloc range for the bytes in the * file you want to defrag, we return 0 to let you know to skip this * part of the file */ static int check_defrag_in_cache(struct inode *inode, u64 offset, int thresh) { struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; struct extent_map *em = NULL; struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; u64 end; read_lock(&em_tree->lock); em = lookup_extent_mapping(em_tree, offset, PAGE_CACHE_SIZE); read_unlock(&em_tree->lock); if (em) { end = extent_map_end(em); free_extent_map(em); if (end - offset > thresh) return 0; } /* if we already have a nice delalloc here, just stop */ thresh /= 2; end = count_range_bits(io_tree, &offset, offset + thresh, thresh, EXTENT_DELALLOC, 1); if (end >= thresh) return 0; return 1; } /* * helper function to walk through a file and find extents * newer than a specific transid, and smaller than thresh. * * This is used by the defragging code to find new and small * extents */ static int find_new_extents(struct btrfs_root *root, struct inode *inode, u64 newer_than, u64 *off, int thresh) { struct btrfs_path *path; struct btrfs_key min_key; |
4cb5300bc
|
882 883 884 885 |
struct extent_buffer *leaf; struct btrfs_file_extent_item *extent; int type; int ret; |
a4689d2bd
|
886 |
u64 ino = btrfs_ino(inode); |
4cb5300bc
|
887 888 889 890 |
path = btrfs_alloc_path(); if (!path) return -ENOMEM; |
a4689d2bd
|
891 |
min_key.objectid = ino; |
4cb5300bc
|
892 893 |
min_key.type = BTRFS_EXTENT_DATA_KEY; min_key.offset = *off; |
678712545
|
894 |
while (1) { |
f094c9bd3
|
895 |
path->keep_locks = 1; |
6174d3cb4
|
896 |
ret = btrfs_search_forward(root, &min_key, path, newer_than); |
4cb5300bc
|
897 898 |
if (ret != 0) goto none; |
f094c9bd3
|
899 900 901 |
path->keep_locks = 0; btrfs_unlock_up_safe(path, 1); process_slot: |
a4689d2bd
|
902 |
if (min_key.objectid != ino) |
4cb5300bc
|
903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 |
goto none; if (min_key.type != BTRFS_EXTENT_DATA_KEY) goto none; leaf = path->nodes[0]; extent = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_file_extent_item); type = btrfs_file_extent_type(leaf, extent); if (type == BTRFS_FILE_EXTENT_REG && btrfs_file_extent_num_bytes(leaf, extent) < thresh && check_defrag_in_cache(inode, min_key.offset, thresh)) { *off = min_key.offset; btrfs_free_path(path); return 0; } |
f094c9bd3
|
919 920 921 922 923 |
path->slots[0]++; if (path->slots[0] < btrfs_header_nritems(leaf)) { btrfs_item_key_to_cpu(leaf, &min_key, path->slots[0]); goto process_slot; } |
4cb5300bc
|
924 925 926 927 928 929 930 931 932 933 |
if (min_key.offset == (u64)-1) goto none; min_key.offset++; btrfs_release_path(path); } none: btrfs_free_path(path); return -ENOENT; } |
6c282eb40
|
934 |
static struct extent_map *defrag_lookup_extent(struct inode *inode, u64 start) |
17ce6ef8d
|
935 936 |
{ struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; |
6c282eb40
|
937 938 939 |
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; struct extent_map *em; u64 len = PAGE_CACHE_SIZE; |
17ce6ef8d
|
940 |
|
6c282eb40
|
941 942 943 944 |
/* * hopefully we have this extent in the tree already, try without * the full extent lock */ |
17ce6ef8d
|
945 |
read_lock(&em_tree->lock); |
6c282eb40
|
946 |
em = lookup_extent_mapping(em_tree, start, len); |
17ce6ef8d
|
947 |
read_unlock(&em_tree->lock); |
6c282eb40
|
948 |
if (!em) { |
308d9800b
|
949 950 |
struct extent_state *cached = NULL; u64 end = start + len - 1; |
6c282eb40
|
951 |
/* get the big lock and read metadata off disk */ |
308d9800b
|
952 |
lock_extent_bits(io_tree, start, end, 0, &cached); |
6c282eb40
|
953 |
em = btrfs_get_extent(inode, NULL, 0, start, len, 0); |
308d9800b
|
954 |
unlock_extent_cached(io_tree, start, end, &cached, GFP_NOFS); |
6c282eb40
|
955 956 957 958 959 960 961 |
if (IS_ERR(em)) return NULL; } return em; } |
17ce6ef8d
|
962 |
|
6c282eb40
|
963 964 965 966 967 968 969 970 971 972 |
static bool defrag_check_next_extent(struct inode *inode, struct extent_map *em) { struct extent_map *next; bool ret = true; /* this is the last extent */ if (em->start + em->len >= i_size_read(inode)) return false; next = defrag_lookup_extent(inode, em->start + em->len); |
e2127cf00
|
973 974 |
if (!next || next->block_start >= EXTENT_MAP_LAST_BYTE || (em->block_start + em->block_len == next->block_start)) |
6c282eb40
|
975 976 977 |
ret = false; free_extent_map(next); |
17ce6ef8d
|
978 979 |
return ret; } |
6c282eb40
|
980 |
static int should_defrag_range(struct inode *inode, u64 start, int thresh, |
a43a21113
|
981 982 |
u64 *last_len, u64 *skip, u64 *defrag_end, int compress) |
940100a4a
|
983 |
{ |
6c282eb40
|
984 |
struct extent_map *em; |
940100a4a
|
985 |
int ret = 1; |
6c282eb40
|
986 |
bool next_mergeable = true; |
940100a4a
|
987 988 |
/* |
008873eaf
|
989 |
* make sure that once we start defragging an extent, we keep on |
940100a4a
|
990 991 992 993 994 995 |
* defragging it */ if (start < *defrag_end) return 1; *skip = 0; |
6c282eb40
|
996 997 998 |
em = defrag_lookup_extent(inode, start); if (!em) return 0; |
940100a4a
|
999 1000 |
/* this will cover holes, and inline extents */ |
17ce6ef8d
|
1001 |
if (em->block_start >= EXTENT_MAP_LAST_BYTE) { |
940100a4a
|
1002 |
ret = 0; |
17ce6ef8d
|
1003 1004 |
goto out; } |
6c282eb40
|
1005 |
next_mergeable = defrag_check_next_extent(inode, em); |
940100a4a
|
1006 1007 |
/* |
6c282eb40
|
1008 1009 |
* we hit a real extent, if it is big or the next extent is not a * real extent, don't bother defragging it |
940100a4a
|
1010 |
*/ |
a43a21113
|
1011 |
if (!compress && (*last_len == 0 || *last_len >= thresh) && |
6c282eb40
|
1012 |
(em->len >= thresh || !next_mergeable)) |
940100a4a
|
1013 |
ret = 0; |
17ce6ef8d
|
1014 |
out: |
940100a4a
|
1015 1016 1017 1018 1019 1020 1021 1022 1023 |
/* * last_len ends up being a counter of how many bytes we've defragged. * every time we choose not to defrag an extent, we reset *last_len * so that the next tiny extent will force a defrag. * * The end result of this is that tiny extents before a single big * extent will force at least part of that big extent to be defragged. */ if (ret) { |
940100a4a
|
1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 |
*defrag_end = extent_map_end(em); } else { *last_len = 0; *skip = extent_map_end(em); *defrag_end = 0; } free_extent_map(em); return ret; } |
4cb5300bc
|
1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 |
/* * it doesn't do much good to defrag one or two pages * at a time. This pulls in a nice chunk of pages * to COW and defrag. * * It also makes sure the delalloc code has enough * dirty data to avoid making new small extents as part * of the defrag * * It's a good idea to start RA on this range * before calling this. */ static int cluster_pages_for_defrag(struct inode *inode, struct page **pages, unsigned long start_index, |
c41570c9d
|
1049 |
unsigned long num_pages) |
f46b5a66b
|
1050 |
{ |
4cb5300bc
|
1051 1052 1053 1054 |
unsigned long file_end; u64 isize = i_size_read(inode); u64 page_start; u64 page_end; |
1f12bd063
|
1055 |
u64 page_cnt; |
4cb5300bc
|
1056 1057 1058 |
int ret; int i; int i_done; |
3eaa28852
|
1059 |
struct btrfs_ordered_extent *ordered; |
4cb5300bc
|
1060 |
struct extent_state *cached_state = NULL; |
600a45e1d
|
1061 |
struct extent_io_tree *tree; |
3b16a4e3c
|
1062 |
gfp_t mask = btrfs_alloc_write_mask(inode->i_mapping); |
4cb5300bc
|
1063 |
|
4cb5300bc
|
1064 |
file_end = (isize - 1) >> PAGE_CACHE_SHIFT; |
1f12bd063
|
1065 1066 1067 1068 |
if (!isize || start_index > file_end) return 0; page_cnt = min_t(u64, (u64)num_pages, (u64)file_end - start_index + 1); |
4cb5300bc
|
1069 1070 |
ret = btrfs_delalloc_reserve_space(inode, |
1f12bd063
|
1071 |
page_cnt << PAGE_CACHE_SHIFT); |
4cb5300bc
|
1072 1073 |
if (ret) return ret; |
4cb5300bc
|
1074 |
i_done = 0; |
600a45e1d
|
1075 |
tree = &BTRFS_I(inode)->io_tree; |
4cb5300bc
|
1076 1077 |
/* step one, lock all the pages */ |
1f12bd063
|
1078 |
for (i = 0; i < page_cnt; i++) { |
4cb5300bc
|
1079 |
struct page *page; |
600a45e1d
|
1080 |
again: |
a94733d0b
|
1081 |
page = find_or_create_page(inode->i_mapping, |
600a45e1d
|
1082 |
start_index + i, mask); |
4cb5300bc
|
1083 1084 |
if (!page) break; |
600a45e1d
|
1085 1086 1087 |
page_start = page_offset(page); page_end = page_start + PAGE_CACHE_SIZE - 1; while (1) { |
308d9800b
|
1088 1089 |
lock_extent_bits(tree, page_start, page_end, 0, &cached_state); |
600a45e1d
|
1090 1091 |
ordered = btrfs_lookup_ordered_extent(inode, page_start); |
308d9800b
|
1092 1093 |
unlock_extent_cached(tree, page_start, page_end, &cached_state, GFP_NOFS); |
600a45e1d
|
1094 1095 1096 1097 1098 1099 1100 |
if (!ordered) break; unlock_page(page); btrfs_start_ordered_extent(inode, ordered, 1); btrfs_put_ordered_extent(ordered); lock_page(page); |
1f12bd063
|
1101 1102 1103 1104 1105 1106 1107 1108 1109 |
/* * we unlocked the page above, so we need check if * it was released or not. */ if (page->mapping != inode->i_mapping) { unlock_page(page); page_cache_release(page); goto again; } |
600a45e1d
|
1110 |
} |
4cb5300bc
|
1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 |
if (!PageUptodate(page)) { btrfs_readpage(NULL, page); lock_page(page); if (!PageUptodate(page)) { unlock_page(page); page_cache_release(page); ret = -EIO; break; } } |
600a45e1d
|
1121 |
|
600a45e1d
|
1122 1123 1124 1125 1126 |
if (page->mapping != inode->i_mapping) { unlock_page(page); page_cache_release(page); goto again; } |
4cb5300bc
|
1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 |
pages[i] = page; i_done++; } if (!i_done || ret) goto out; if (!(inode->i_sb->s_flags & MS_ACTIVE)) goto out; /* * so now we have a nice long stream of locked * and up to date pages, lets wait on them */ for (i = 0; i < i_done; i++) wait_on_page_writeback(pages[i]); page_start = page_offset(pages[0]); page_end = page_offset(pages[i_done - 1]) + PAGE_CACHE_SIZE; lock_extent_bits(&BTRFS_I(inode)->io_tree, |
d0082371c
|
1147 |
page_start, page_end - 1, 0, &cached_state); |
4cb5300bc
|
1148 1149 |
clear_extent_bit(&BTRFS_I(inode)->io_tree, page_start, page_end - 1, EXTENT_DIRTY | EXTENT_DELALLOC | |
9e8a4a8b0
|
1150 1151 |
EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG, 0, 0, &cached_state, GFP_NOFS); |
4cb5300bc
|
1152 |
|
1f12bd063
|
1153 |
if (i_done != page_cnt) { |
9e0baf60d
|
1154 1155 1156 |
spin_lock(&BTRFS_I(inode)->lock); BTRFS_I(inode)->outstanding_extents++; spin_unlock(&BTRFS_I(inode)->lock); |
4cb5300bc
|
1157 |
btrfs_delalloc_release_space(inode, |
1f12bd063
|
1158 |
(page_cnt - i_done) << PAGE_CACHE_SHIFT); |
4cb5300bc
|
1159 |
} |
9e8a4a8b0
|
1160 1161 |
set_extent_defrag(&BTRFS_I(inode)->io_tree, page_start, page_end - 1, &cached_state, GFP_NOFS); |
4cb5300bc
|
1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 |
unlock_extent_cached(&BTRFS_I(inode)->io_tree, page_start, page_end - 1, &cached_state, GFP_NOFS); for (i = 0; i < i_done; i++) { clear_page_dirty_for_io(pages[i]); ClearPageChecked(pages[i]); set_page_extent_mapped(pages[i]); set_page_dirty(pages[i]); unlock_page(pages[i]); page_cache_release(pages[i]); } return i_done; out: for (i = 0; i < i_done; i++) { unlock_page(pages[i]); page_cache_release(pages[i]); } |
1f12bd063
|
1181 |
btrfs_delalloc_release_space(inode, page_cnt << PAGE_CACHE_SHIFT); |
4cb5300bc
|
1182 1183 1184 1185 1186 1187 1188 1189 1190 |
return ret; } int btrfs_defrag_file(struct inode *inode, struct file *file, struct btrfs_ioctl_defrag_range_args *range, u64 newer_than, unsigned long max_to_defrag) { struct btrfs_root *root = BTRFS_I(inode)->root; |
4cb5300bc
|
1191 |
struct file_ra_state *ra = NULL; |
f46b5a66b
|
1192 |
unsigned long last_index; |
151a31b25
|
1193 |
u64 isize = i_size_read(inode); |
940100a4a
|
1194 1195 1196 |
u64 last_len = 0; u64 skip = 0; u64 defrag_end = 0; |
4cb5300bc
|
1197 |
u64 newer_off = range->start; |
f46b5a66b
|
1198 |
unsigned long i; |
008873eaf
|
1199 |
unsigned long ra_index = 0; |
f46b5a66b
|
1200 |
int ret; |
4cb5300bc
|
1201 |
int defrag_count = 0; |
1a419d85a
|
1202 |
int compress_type = BTRFS_COMPRESS_ZLIB; |
4cb5300bc
|
1203 |
int extent_thresh = range->extent_thresh; |
c41570c9d
|
1204 1205 |
unsigned long max_cluster = (256 * 1024) >> PAGE_CACHE_SHIFT; unsigned long cluster = max_cluster; |
4cb5300bc
|
1206 1207 |
u64 new_align = ~((u64)128 * 1024 - 1); struct page **pages = NULL; |
0abd5b172
|
1208 1209 1210 1211 1212 |
if (isize == 0) return 0; if (range->start >= isize) return -EINVAL; |
1a419d85a
|
1213 1214 1215 1216 1217 1218 1219 |
if (range->flags & BTRFS_DEFRAG_RANGE_COMPRESS) { if (range->compress_type > BTRFS_COMPRESS_TYPES) return -EINVAL; if (range->compress_type) compress_type = range->compress_type; } |
f46b5a66b
|
1220 |
|
0abd5b172
|
1221 1222 |
if (extent_thresh == 0) extent_thresh = 256 * 1024; |
940100a4a
|
1223 |
|
4cb5300bc
|
1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 |
/* * if we were not given a file, allocate a readahead * context */ if (!file) { ra = kzalloc(sizeof(*ra), GFP_NOFS); if (!ra) return -ENOMEM; file_ra_state_init(ra, inode->i_mapping); } else { ra = &file->f_ra; } |
d9b0d9ba0
|
1236 |
pages = kmalloc_array(max_cluster, sizeof(struct page *), |
4cb5300bc
|
1237 1238 1239 1240 1241 1242 1243 |
GFP_NOFS); if (!pages) { ret = -ENOMEM; goto out_ra; } /* find the last page to defrag */ |
1e701a329
|
1244 |
if (range->start + range->len > range->start) { |
151a31b25
|
1245 |
last_index = min_t(u64, isize - 1, |
1e701a329
|
1246 1247 |
range->start + range->len - 1) >> PAGE_CACHE_SHIFT; } else { |
151a31b25
|
1248 |
last_index = (isize - 1) >> PAGE_CACHE_SHIFT; |
1e701a329
|
1249 |
} |
4cb5300bc
|
1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 |
if (newer_than) { ret = find_new_extents(root, inode, newer_than, &newer_off, 64 * 1024); if (!ret) { range->start = newer_off; /* * we always align our defrag to help keep * the extents in the file evenly spaced */ i = (newer_off & new_align) >> PAGE_CACHE_SHIFT; |
4cb5300bc
|
1260 1261 1262 1263 1264 1265 |
} else goto out_ra; } else { i = range->start >> PAGE_CACHE_SHIFT; } if (!max_to_defrag) |
7ec31b548
|
1266 |
max_to_defrag = last_index + 1; |
4cb5300bc
|
1267 |
|
2a0f7f576
|
1268 1269 1270 1271 1272 1273 |
/* * make writeback starts from i, so the defrag range can be * written sequentially. */ if (i < inode->i_mapping->writeback_index) inode->i_mapping->writeback_index = i; |
f7f43cc84
|
1274 1275 1276 |
while (i <= last_index && defrag_count < max_to_defrag && (i < (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT)) { |
4cb5300bc
|
1277 1278 1279 1280 1281 1282 |
/* * make sure we stop running if someone unmounts * the FS */ if (!(inode->i_sb->s_flags & MS_ACTIVE)) break; |
210549ebe
|
1283 |
if (btrfs_defrag_cancelled(root->fs_info)) { |
efe120a06
|
1284 1285 |
printk(KERN_DEBUG "BTRFS: defrag_file cancelled "); |
210549ebe
|
1286 1287 1288 |
ret = -EAGAIN; break; } |
66c268922
|
1289 |
if (!should_defrag_range(inode, (u64)i << PAGE_CACHE_SHIFT, |
6c282eb40
|
1290 |
extent_thresh, &last_len, &skip, |
a43a21113
|
1291 1292 |
&defrag_end, range->flags & BTRFS_DEFRAG_RANGE_COMPRESS)) { |
940100a4a
|
1293 1294 1295 1296 1297 1298 1299 1300 1301 |
unsigned long next; /* * the should_defrag function tells us how much to skip * bump our counter by the suggested amount */ next = (skip + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; i = max(i + 1, next); continue; } |
008873eaf
|
1302 1303 1304 1305 1306 1307 1308 1309 |
if (!newer_than) { cluster = (PAGE_CACHE_ALIGN(defrag_end) >> PAGE_CACHE_SHIFT) - i; cluster = min(cluster, max_cluster); } else { cluster = max_cluster; } |
008873eaf
|
1310 1311 1312 1313 1314 1315 |
if (i + cluster > ra_index) { ra_index = max(i, ra_index); btrfs_force_ra(inode->i_mapping, ra, file, ra_index, cluster); ra_index += max_cluster; } |
940100a4a
|
1316 |
|
ecb8bea87
|
1317 |
mutex_lock(&inode->i_mutex); |
633085c79
|
1318 1319 |
if (range->flags & BTRFS_DEFRAG_RANGE_COMPRESS) BTRFS_I(inode)->force_compress = compress_type; |
008873eaf
|
1320 |
ret = cluster_pages_for_defrag(inode, pages, i, cluster); |
ecb8bea87
|
1321 1322 |
if (ret < 0) { mutex_unlock(&inode->i_mutex); |
4cb5300bc
|
1323 |
goto out_ra; |
ecb8bea87
|
1324 |
} |
4cb5300bc
|
1325 1326 |
defrag_count += ret; |
d0e1d66b5
|
1327 |
balance_dirty_pages_ratelimited(inode->i_mapping); |
ecb8bea87
|
1328 |
mutex_unlock(&inode->i_mutex); |
4cb5300bc
|
1329 1330 1331 1332 |
if (newer_than) { if (newer_off == (u64)-1) break; |
e1f041e14
|
1333 1334 |
if (ret > 0) i += ret; |
4cb5300bc
|
1335 1336 1337 1338 1339 1340 1341 1342 1343 |
newer_off = max(newer_off + 1, (u64)i << PAGE_CACHE_SHIFT); ret = find_new_extents(root, inode, newer_than, &newer_off, 64 * 1024); if (!ret) { range->start = newer_off; i = (newer_off & new_align) >> PAGE_CACHE_SHIFT; |
4cb5300bc
|
1344 1345 |
} else { break; |
f46b5a66b
|
1346 |
} |
4cb5300bc
|
1347 |
} else { |
008873eaf
|
1348 |
if (ret > 0) { |
cbcc83265
|
1349 |
i += ret; |
008873eaf
|
1350 1351 |
last_len += ret << PAGE_CACHE_SHIFT; } else { |
cbcc83265
|
1352 |
i++; |
008873eaf
|
1353 1354 |
last_len = 0; } |
f46b5a66b
|
1355 |
} |
f46b5a66b
|
1356 |
} |
dec8ef905
|
1357 |
if ((range->flags & BTRFS_DEFRAG_RANGE_START_IO)) { |
1e701a329
|
1358 |
filemap_flush(inode->i_mapping); |
dec8ef905
|
1359 1360 1361 1362 |
if (test_bit(BTRFS_INODE_HAS_ASYNC_EXTENT, &BTRFS_I(inode)->runtime_flags)) filemap_flush(inode->i_mapping); } |
1e701a329
|
1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 |
if ((range->flags & BTRFS_DEFRAG_RANGE_COMPRESS)) { /* the filemap_flush will queue IO into the worker threads, but * we have to make sure the IO is actually started and that * ordered extents get created before we return */ atomic_inc(&root->fs_info->async_submit_draining); while (atomic_read(&root->fs_info->nr_async_submits) || atomic_read(&root->fs_info->async_delalloc_pages)) { wait_event(root->fs_info->async_submit_wait, (atomic_read(&root->fs_info->nr_async_submits) == 0 && atomic_read(&root->fs_info->async_delalloc_pages) == 0)); } atomic_dec(&root->fs_info->async_submit_draining); |
1e701a329
|
1377 |
} |
1a419d85a
|
1378 |
if (range->compress_type == BTRFS_COMPRESS_LZO) { |
2b0ce2c29
|
1379 |
btrfs_set_fs_incompat(root->fs_info, COMPRESS_LZO); |
1a419d85a
|
1380 |
} |
60ccf82f5
|
1381 |
ret = defrag_count; |
940100a4a
|
1382 |
|
4cb5300bc
|
1383 |
out_ra: |
633085c79
|
1384 1385 1386 1387 1388 |
if (range->flags & BTRFS_DEFRAG_RANGE_COMPRESS) { mutex_lock(&inode->i_mutex); BTRFS_I(inode)->force_compress = BTRFS_COMPRESS_NONE; mutex_unlock(&inode->i_mutex); } |
4cb5300bc
|
1389 1390 1391 |
if (!file) kfree(ra); kfree(pages); |
940100a4a
|
1392 |
return ret; |
f46b5a66b
|
1393 |
} |
198605a8e
|
1394 |
static noinline int btrfs_ioctl_resize(struct file *file, |
76dda93c6
|
1395 |
void __user *arg) |
f46b5a66b
|
1396 1397 1398 1399 |
{ u64 new_size; u64 old_size; u64 devid = 1; |
496ad9aa8
|
1400 |
struct btrfs_root *root = BTRFS_I(file_inode(file))->root; |
f46b5a66b
|
1401 1402 1403 1404 |
struct btrfs_ioctl_vol_args *vol_args; struct btrfs_trans_handle *trans; struct btrfs_device *device = NULL; char *sizestr; |
9a40f1222
|
1405 |
char *retptr; |
f46b5a66b
|
1406 1407 |
char *devstr = NULL; int ret = 0; |
f46b5a66b
|
1408 |
int mod = 0; |
e441d54de
|
1409 1410 |
if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
198605a8e
|
1411 1412 1413 |
ret = mnt_want_write_file(file); if (ret) return ret; |
5ac00addc
|
1414 1415 |
if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running, 1)) { |
975476765
|
1416 |
mnt_drop_write_file(file); |
e57138b3e
|
1417 |
return BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS; |
c9e9f97bd
|
1418 |
} |
5ac00addc
|
1419 |
mutex_lock(&root->fs_info->volume_mutex); |
dae7b665c
|
1420 |
vol_args = memdup_user(arg, sizeof(*vol_args)); |
c9e9f97bd
|
1421 1422 1423 1424 |
if (IS_ERR(vol_args)) { ret = PTR_ERR(vol_args); goto out; } |
5516e5957
|
1425 1426 |
vol_args->name[BTRFS_PATH_NAME_MAX] = '\0'; |
f46b5a66b
|
1427 |
|
f46b5a66b
|
1428 1429 1430 1431 1432 1433 1434 1435 |
sizestr = vol_args->name; devstr = strchr(sizestr, ':'); if (devstr) { char *end; sizestr = devstr + 1; *devstr = '\0'; devstr = vol_args->name; devid = simple_strtoull(devstr, &end, 10); |
dfd79829b
|
1436 1437 1438 1439 |
if (!devid) { ret = -EINVAL; goto out_free; } |
efe120a06
|
1440 |
btrfs_info(root->fs_info, "resizing devid %llu", devid); |
f46b5a66b
|
1441 |
} |
dba60f3f5
|
1442 |
|
aa1b8cd40
|
1443 |
device = btrfs_find_device(root->fs_info, devid, NULL, NULL); |
f46b5a66b
|
1444 |
if (!device) { |
efe120a06
|
1445 |
btrfs_info(root->fs_info, "resizer unable to find device %llu", |
c1c9ff7c9
|
1446 |
devid); |
dfd79829b
|
1447 |
ret = -ENODEV; |
c9e9f97bd
|
1448 |
goto out_free; |
f46b5a66b
|
1449 |
} |
dba60f3f5
|
1450 1451 |
if (!device->writeable) { |
efe120a06
|
1452 1453 |
btrfs_info(root->fs_info, "resizer unable to apply on readonly device %llu", |
c1c9ff7c9
|
1454 |
devid); |
dfd79829b
|
1455 |
ret = -EPERM; |
4e42ae1bd
|
1456 1457 |
goto out_free; } |
f46b5a66b
|
1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 |
if (!strcmp(sizestr, "max")) new_size = device->bdev->bd_inode->i_size; else { if (sizestr[0] == '-') { mod = -1; sizestr++; } else if (sizestr[0] == '+') { mod = 1; sizestr++; } |
9a40f1222
|
1468 1469 |
new_size = memparse(sizestr, &retptr); if (*retptr != '\0' || new_size == 0) { |
f46b5a66b
|
1470 |
ret = -EINVAL; |
c9e9f97bd
|
1471 |
goto out_free; |
f46b5a66b
|
1472 1473 |
} } |
63a212abc
|
1474 |
if (device->is_tgtdev_for_dev_replace) { |
dfd79829b
|
1475 |
ret = -EPERM; |
63a212abc
|
1476 1477 |
goto out_free; } |
f46b5a66b
|
1478 1479 1480 1481 1482 |
old_size = device->total_bytes; if (mod < 0) { if (new_size > old_size) { ret = -EINVAL; |
c9e9f97bd
|
1483 |
goto out_free; |
f46b5a66b
|
1484 1485 1486 |
} new_size = old_size - new_size; } else if (mod > 0) { |
eb8052e01
|
1487 1488 1489 1490 |
if (new_size > ULLONG_MAX - old_size) { ret = -EINVAL; goto out_free; } |
f46b5a66b
|
1491 1492 1493 1494 1495 |
new_size = old_size + new_size; } if (new_size < 256 * 1024 * 1024) { ret = -EINVAL; |
c9e9f97bd
|
1496 |
goto out_free; |
f46b5a66b
|
1497 1498 1499 |
} if (new_size > device->bdev->bd_inode->i_size) { ret = -EFBIG; |
c9e9f97bd
|
1500 |
goto out_free; |
f46b5a66b
|
1501 1502 1503 1504 |
} do_div(new_size, root->sectorsize); new_size *= root->sectorsize; |
efe120a06
|
1505 1506 |
printk_in_rcu(KERN_INFO "BTRFS: new size for %s is %llu ", |
c1c9ff7c9
|
1507 |
rcu_str_deref(device->name), new_size); |
f46b5a66b
|
1508 1509 |
if (new_size > old_size) { |
a22285a6a
|
1510 |
trans = btrfs_start_transaction(root, 0); |
98d5dc13e
|
1511 1512 |
if (IS_ERR(trans)) { ret = PTR_ERR(trans); |
c9e9f97bd
|
1513 |
goto out_free; |
98d5dc13e
|
1514 |
} |
f46b5a66b
|
1515 1516 |
ret = btrfs_grow_device(trans, device, new_size); btrfs_commit_transaction(trans, root); |
ece7d20e8
|
1517 |
} else if (new_size < old_size) { |
f46b5a66b
|
1518 |
ret = btrfs_shrink_device(device, new_size); |
0253f40ef
|
1519 |
} /* equal, nothing need to do */ |
f46b5a66b
|
1520 |
|
c9e9f97bd
|
1521 |
out_free: |
f46b5a66b
|
1522 |
kfree(vol_args); |
c9e9f97bd
|
1523 1524 |
out: mutex_unlock(&root->fs_info->volume_mutex); |
5ac00addc
|
1525 |
atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0); |
18f39c416
|
1526 |
mnt_drop_write_file(file); |
f46b5a66b
|
1527 1528 |
return ret; } |
72fd032e9
|
1529 |
static noinline int btrfs_ioctl_snap_create_transid(struct file *file, |
6f72c7e20
|
1530 1531 |
char *name, unsigned long fd, int subvol, u64 *transid, bool readonly, |
8696c5330
|
1532 |
struct btrfs_qgroup_inherit *inherit) |
f46b5a66b
|
1533 |
{ |
f46b5a66b
|
1534 |
int namelen; |
3de4586c5
|
1535 |
int ret = 0; |
f46b5a66b
|
1536 |
|
a874a63e1
|
1537 1538 1539 |
ret = mnt_want_write_file(file); if (ret) goto out; |
72fd032e9
|
1540 1541 |
namelen = strlen(name); if (strchr(name, '/')) { |
f46b5a66b
|
1542 |
ret = -EINVAL; |
a874a63e1
|
1543 |
goto out_drop_write; |
f46b5a66b
|
1544 |
} |
16780cabb
|
1545 1546 1547 |
if (name[0] == '.' && (namelen == 1 || (name[1] == '.' && namelen == 2))) { ret = -EEXIST; |
a874a63e1
|
1548 |
goto out_drop_write; |
16780cabb
|
1549 |
} |
3de4586c5
|
1550 |
if (subvol) { |
72fd032e9
|
1551 |
ret = btrfs_mksubvol(&file->f_path, name, namelen, |
6f72c7e20
|
1552 |
NULL, transid, readonly, inherit); |
cb8e70901
|
1553 |
} else { |
2903ff019
|
1554 |
struct fd src = fdget(fd); |
3de4586c5
|
1555 |
struct inode *src_inode; |
2903ff019
|
1556 |
if (!src.file) { |
3de4586c5
|
1557 |
ret = -EINVAL; |
a874a63e1
|
1558 |
goto out_drop_write; |
3de4586c5
|
1559 |
} |
496ad9aa8
|
1560 1561 |
src_inode = file_inode(src.file); if (src_inode->i_sb != file_inode(file)->i_sb) { |
efe120a06
|
1562 1563 |
btrfs_info(BTRFS_I(src_inode)->root->fs_info, "Snapshot src from another FS"); |
23ad5b17d
|
1564 |
ret = -EXDEV; |
d02420613
|
1565 1566 1567 1568 1569 1570 |
} else if (!inode_owner_or_capable(src_inode)) { /* * Subvolume creation is not restricted, but snapshots * are limited to own subvolumes only */ ret = -EPERM; |
ecd188159
|
1571 1572 1573 1574 |
} else { ret = btrfs_mksubvol(&file->f_path, name, namelen, BTRFS_I(src_inode)->root, transid, readonly, inherit); |
3de4586c5
|
1575 |
} |
2903ff019
|
1576 |
fdput(src); |
cb8e70901
|
1577 |
} |
a874a63e1
|
1578 1579 |
out_drop_write: mnt_drop_write_file(file); |
f46b5a66b
|
1580 |
out: |
72fd032e9
|
1581 1582 1583 1584 |
return ret; } static noinline int btrfs_ioctl_snap_create(struct file *file, |
fa0d2b9bd
|
1585 |
void __user *arg, int subvol) |
72fd032e9
|
1586 |
{ |
fa0d2b9bd
|
1587 |
struct btrfs_ioctl_vol_args *vol_args; |
72fd032e9
|
1588 |
int ret; |
fa0d2b9bd
|
1589 1590 1591 1592 |
vol_args = memdup_user(arg, sizeof(*vol_args)); if (IS_ERR(vol_args)) return PTR_ERR(vol_args); vol_args->name[BTRFS_PATH_NAME_MAX] = '\0'; |
72fd032e9
|
1593 |
|
fa0d2b9bd
|
1594 |
ret = btrfs_ioctl_snap_create_transid(file, vol_args->name, |
b83cc9693
|
1595 |
vol_args->fd, subvol, |
6f72c7e20
|
1596 |
NULL, false, NULL); |
fdfb1e4f6
|
1597 |
|
fa0d2b9bd
|
1598 1599 1600 |
kfree(vol_args); return ret; } |
fdfb1e4f6
|
1601 |
|
fa0d2b9bd
|
1602 1603 1604 1605 1606 1607 1608 |
static noinline int btrfs_ioctl_snap_create_v2(struct file *file, void __user *arg, int subvol) { struct btrfs_ioctl_vol_args_v2 *vol_args; int ret; u64 transid = 0; u64 *ptr = NULL; |
b83cc9693
|
1609 |
bool readonly = false; |
6f72c7e20
|
1610 |
struct btrfs_qgroup_inherit *inherit = NULL; |
75eaa0e22
|
1611 |
|
fa0d2b9bd
|
1612 1613 1614 1615 |
vol_args = memdup_user(arg, sizeof(*vol_args)); if (IS_ERR(vol_args)) return PTR_ERR(vol_args); vol_args->name[BTRFS_SUBVOL_NAME_MAX] = '\0'; |
75eaa0e22
|
1616 |
|
b83cc9693
|
1617 |
if (vol_args->flags & |
6f72c7e20
|
1618 1619 |
~(BTRFS_SUBVOL_CREATE_ASYNC | BTRFS_SUBVOL_RDONLY | BTRFS_SUBVOL_QGROUP_INHERIT)) { |
b83cc9693
|
1620 |
ret = -EOPNOTSUPP; |
fa0d2b9bd
|
1621 |
goto out; |
72fd032e9
|
1622 |
} |
fa0d2b9bd
|
1623 1624 1625 |
if (vol_args->flags & BTRFS_SUBVOL_CREATE_ASYNC) ptr = &transid; |
b83cc9693
|
1626 1627 |
if (vol_args->flags & BTRFS_SUBVOL_RDONLY) readonly = true; |
6f72c7e20
|
1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 |
if (vol_args->flags & BTRFS_SUBVOL_QGROUP_INHERIT) { if (vol_args->size > PAGE_CACHE_SIZE) { ret = -EINVAL; goto out; } inherit = memdup_user(vol_args->qgroup_inherit, vol_args->size); if (IS_ERR(inherit)) { ret = PTR_ERR(inherit); goto out; } } |
fa0d2b9bd
|
1639 1640 |
ret = btrfs_ioctl_snap_create_transid(file, vol_args->name, |
6f72c7e20
|
1641 |
vol_args->fd, subvol, ptr, |
8696c5330
|
1642 |
readonly, inherit); |
fa0d2b9bd
|
1643 1644 1645 1646 1647 1648 |
if (ret == 0 && ptr && copy_to_user(arg + offsetof(struct btrfs_ioctl_vol_args_v2, transid), ptr, sizeof(*ptr))) ret = -EFAULT; |
fdfb1e4f6
|
1649 |
out: |
f46b5a66b
|
1650 |
kfree(vol_args); |
6f72c7e20
|
1651 |
kfree(inherit); |
f46b5a66b
|
1652 1653 |
return ret; } |
0caa102da
|
1654 1655 1656 |
static noinline int btrfs_ioctl_subvol_getflags(struct file *file, void __user *arg) { |
496ad9aa8
|
1657 |
struct inode *inode = file_inode(file); |
0caa102da
|
1658 1659 1660 |
struct btrfs_root *root = BTRFS_I(inode)->root; int ret = 0; u64 flags = 0; |
33345d015
|
1661 |
if (btrfs_ino(inode) != BTRFS_FIRST_FREE_OBJECTID) |
0caa102da
|
1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 |
return -EINVAL; down_read(&root->fs_info->subvol_sem); if (btrfs_root_readonly(root)) flags |= BTRFS_SUBVOL_RDONLY; up_read(&root->fs_info->subvol_sem); if (copy_to_user(arg, &flags, sizeof(flags))) ret = -EFAULT; return ret; } static noinline int btrfs_ioctl_subvol_setflags(struct file *file, void __user *arg) { |
496ad9aa8
|
1678 |
struct inode *inode = file_inode(file); |
0caa102da
|
1679 1680 1681 1682 1683 |
struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_trans_handle *trans; u64 root_flags; u64 flags; int ret = 0; |
bd60ea0fe
|
1684 1685 |
if (!inode_owner_or_capable(inode)) return -EPERM; |
b9ca0664d
|
1686 1687 1688 |
ret = mnt_want_write_file(file); if (ret) goto out; |
0caa102da
|
1689 |
|
b9ca0664d
|
1690 1691 1692 1693 |
if (btrfs_ino(inode) != BTRFS_FIRST_FREE_OBJECTID) { ret = -EINVAL; goto out_drop_write; } |
0caa102da
|
1694 |
|
b9ca0664d
|
1695 1696 1697 1698 |
if (copy_from_user(&flags, arg, sizeof(flags))) { ret = -EFAULT; goto out_drop_write; } |
0caa102da
|
1699 |
|
b9ca0664d
|
1700 1701 1702 1703 |
if (flags & BTRFS_SUBVOL_CREATE_ASYNC) { ret = -EINVAL; goto out_drop_write; } |
0caa102da
|
1704 |
|
b9ca0664d
|
1705 1706 1707 1708 |
if (flags & ~BTRFS_SUBVOL_RDONLY) { ret = -EOPNOTSUPP; goto out_drop_write; } |
0caa102da
|
1709 1710 1711 1712 1713 |
down_write(&root->fs_info->subvol_sem); /* nothing to do */ if (!!(flags & BTRFS_SUBVOL_RDONLY) == btrfs_root_readonly(root)) |
b9ca0664d
|
1714 |
goto out_drop_sem; |
0caa102da
|
1715 1716 |
root_flags = btrfs_root_flags(&root->root_item); |
2c6865378
|
1717 |
if (flags & BTRFS_SUBVOL_RDONLY) { |
0caa102da
|
1718 1719 |
btrfs_set_root_flags(&root->root_item, root_flags | BTRFS_ROOT_SUBVOL_RDONLY); |
2c6865378
|
1720 1721 1722 1723 1724 1725 1726 1727 |
} else { /* * Block RO -> RW transition if this subvolume is involved in * send */ spin_lock(&root->root_item_lock); if (root->send_in_progress == 0) { btrfs_set_root_flags(&root->root_item, |
0caa102da
|
1728 |
root_flags & ~BTRFS_ROOT_SUBVOL_RDONLY); |
2c6865378
|
1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 |
spin_unlock(&root->root_item_lock); } else { spin_unlock(&root->root_item_lock); btrfs_warn(root->fs_info, "Attempt to set subvolume %llu read-write during send", root->root_key.objectid); ret = -EPERM; goto out_drop_sem; } } |
0caa102da
|
1739 1740 1741 1742 1743 1744 |
trans = btrfs_start_transaction(root, 1); if (IS_ERR(trans)) { ret = PTR_ERR(trans); goto out_reset; } |
b4dc2b8c6
|
1745 |
ret = btrfs_update_root(trans, root->fs_info->tree_root, |
0caa102da
|
1746 1747 1748 1749 1750 1751 |
&root->root_key, &root->root_item); btrfs_commit_transaction(trans, root); out_reset: if (ret) btrfs_set_root_flags(&root->root_item, root_flags); |
b9ca0664d
|
1752 |
out_drop_sem: |
0caa102da
|
1753 |
up_write(&root->fs_info->subvol_sem); |
b9ca0664d
|
1754 1755 1756 |
out_drop_write: mnt_drop_write_file(file); out: |
0caa102da
|
1757 1758 |
return ret; } |
76dda93c6
|
1759 1760 1761 1762 1763 1764 |
/* * helper to check if the subvolume references other subvolumes */ static noinline int may_destroy_subvol(struct btrfs_root *root) { struct btrfs_path *path; |
175a2b871
|
1765 |
struct btrfs_dir_item *di; |
76dda93c6
|
1766 |
struct btrfs_key key; |
175a2b871
|
1767 |
u64 dir_id; |
76dda93c6
|
1768 1769 1770 1771 1772 |
int ret; path = btrfs_alloc_path(); if (!path) return -ENOMEM; |
175a2b871
|
1773 1774 1775 1776 1777 1778 1779 |
/* Make sure this root isn't set as the default subvol */ dir_id = btrfs_super_root_dir(root->fs_info->super_copy); di = btrfs_lookup_dir_item(NULL, root->fs_info->tree_root, path, dir_id, "default", 7, 0); if (di && !IS_ERR(di)) { btrfs_dir_item_key_to_cpu(path->nodes[0], di, &key); if (key.objectid == root->root_key.objectid) { |
72de6b539
|
1780 1781 1782 |
ret = -EPERM; btrfs_err(root->fs_info, "deleting default subvolume " "%llu is not allowed", key.objectid); |
175a2b871
|
1783 1784 1785 1786 |
goto out; } btrfs_release_path(path); } |
76dda93c6
|
1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 |
key.objectid = root->root_key.objectid; key.type = BTRFS_ROOT_REF_KEY; key.offset = (u64)-1; ret = btrfs_search_slot(NULL, root->fs_info->tree_root, &key, path, 0, 0); if (ret < 0) goto out; BUG_ON(ret == 0); ret = 0; if (path->slots[0] > 0) { path->slots[0]--; btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]); if (key.objectid == root->root_key.objectid && key.type == BTRFS_ROOT_REF_KEY) ret = -ENOTEMPTY; } out: btrfs_free_path(path); return ret; } |
ac8e9819d
|
1809 1810 1811 |
static noinline int key_in_sk(struct btrfs_key *key, struct btrfs_ioctl_search_key *sk) { |
abc6e1341
|
1812 1813 1814 1815 1816 1817 1818 1819 1820 |
struct btrfs_key test; int ret; test.objectid = sk->min_objectid; test.type = sk->min_type; test.offset = sk->min_offset; ret = btrfs_comp_cpu_keys(key, &test); if (ret < 0) |
ac8e9819d
|
1821 |
return 0; |
abc6e1341
|
1822 1823 1824 1825 1826 1827 1828 |
test.objectid = sk->max_objectid; test.type = sk->max_type; test.offset = sk->max_offset; ret = btrfs_comp_cpu_keys(key, &test); if (ret > 0) |
ac8e9819d
|
1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 |
return 0; return 1; } static noinline int copy_to_sk(struct btrfs_root *root, struct btrfs_path *path, struct btrfs_key *key, struct btrfs_ioctl_search_key *sk, char *buf, unsigned long *sk_offset, int *num_found) { u64 found_transid; struct extent_buffer *leaf; struct btrfs_ioctl_search_header sh; unsigned long item_off; unsigned long item_len; int nritems; int i; int slot; |
ac8e9819d
|
1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 |
int ret = 0; leaf = path->nodes[0]; slot = path->slots[0]; nritems = btrfs_header_nritems(leaf); if (btrfs_header_generation(leaf) > sk->max_transid) { i = nritems; goto advance_key; } found_transid = btrfs_header_generation(leaf); for (i = slot; i < nritems; i++) { item_off = btrfs_item_ptr_offset(leaf, i); item_len = btrfs_item_size_nr(leaf, i); |
03b71c6ca
|
1864 1865 1866 1867 1868 |
btrfs_item_key_to_cpu(leaf, key, i); if (!key_in_sk(key, sk)) continue; if (sizeof(sh) + item_len > BTRFS_SEARCH_ARGS_BUFSIZE) |
ac8e9819d
|
1869 1870 1871 1872 1873 1874 1875 |
item_len = 0; if (sizeof(sh) + item_len + *sk_offset > BTRFS_SEARCH_ARGS_BUFSIZE) { ret = 1; goto overflow; } |
ac8e9819d
|
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 |
sh.objectid = key->objectid; sh.offset = key->offset; sh.type = key->type; sh.len = item_len; sh.transid = found_transid; /* copy search result header */ memcpy(buf + *sk_offset, &sh, sizeof(sh)); *sk_offset += sizeof(sh); if (item_len) { char *p = buf + *sk_offset; /* copy the item */ read_extent_buffer(leaf, p, item_off, item_len); *sk_offset += item_len; |
ac8e9819d
|
1892 |
} |
e21568671
|
1893 |
(*num_found)++; |
ac8e9819d
|
1894 1895 1896 1897 1898 |
if (*num_found >= sk->nr_items) break; } advance_key: |
abc6e1341
|
1899 1900 |
ret = 0; if (key->offset < (u64)-1 && key->offset < sk->max_offset) |
ac8e9819d
|
1901 |
key->offset++; |
abc6e1341
|
1902 1903 |
else if (key->type < (u8)-1 && key->type < sk->max_type) { key->offset = 0; |
ac8e9819d
|
1904 |
key->type++; |
abc6e1341
|
1905 1906 1907 |
} else if (key->objectid < (u64)-1 && key->objectid < sk->max_objectid) { key->offset = 0; key->type = 0; |
ac8e9819d
|
1908 |
key->objectid++; |
abc6e1341
|
1909 1910 |
} else ret = 1; |
ac8e9819d
|
1911 |
overflow: |
ac8e9819d
|
1912 1913 1914 1915 1916 1917 1918 1919 |
return ret; } static noinline int search_ioctl(struct inode *inode, struct btrfs_ioctl_search_args *args) { struct btrfs_root *root; struct btrfs_key key; |
ac8e9819d
|
1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 |
struct btrfs_path *path; struct btrfs_ioctl_search_key *sk = &args->key; struct btrfs_fs_info *info = BTRFS_I(inode)->root->fs_info; int ret; int num_found = 0; unsigned long sk_offset = 0; path = btrfs_alloc_path(); if (!path) return -ENOMEM; if (sk->tree_id == 0) { /* search the root of the inode that was passed */ root = BTRFS_I(inode)->root; } else { key.objectid = sk->tree_id; key.type = BTRFS_ROOT_ITEM_KEY; key.offset = (u64)-1; root = btrfs_read_fs_root_no_name(info, &key); if (IS_ERR(root)) { |
efe120a06
|
1940 1941 |
printk(KERN_ERR "BTRFS: could not find root %llu ", |
ac8e9819d
|
1942 1943 1944 1945 1946 1947 1948 1949 1950 |
sk->tree_id); btrfs_free_path(path); return -ENOENT; } } key.objectid = sk->min_objectid; key.type = sk->min_type; key.offset = sk->min_offset; |
ac8e9819d
|
1951 |
path->keep_locks = 1; |
678712545
|
1952 |
while (1) { |
6174d3cb4
|
1953 |
ret = btrfs_search_forward(root, &key, path, sk->min_transid); |
ac8e9819d
|
1954 1955 1956 1957 1958 1959 1960 |
if (ret != 0) { if (ret > 0) ret = 0; goto err; } ret = copy_to_sk(root, path, &key, sk, args->buf, &sk_offset, &num_found); |
b3b4aa74b
|
1961 |
btrfs_release_path(path); |
ac8e9819d
|
1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 |
if (ret || num_found >= sk->nr_items) break; } ret = 0; err: sk->nr_items = num_found; btrfs_free_path(path); return ret; } static noinline int btrfs_ioctl_tree_search(struct file *file, void __user *argp) { struct btrfs_ioctl_search_args *args; struct inode *inode; int ret; if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
2354d08fe
|
1982 1983 1984 |
args = memdup_user(argp, sizeof(*args)); if (IS_ERR(args)) return PTR_ERR(args); |
ac8e9819d
|
1985 |
|
496ad9aa8
|
1986 |
inode = file_inode(file); |
ac8e9819d
|
1987 1988 1989 1990 1991 1992 |
ret = search_ioctl(inode, args); if (ret == 0 && copy_to_user(argp, args, sizeof(*args))) ret = -EFAULT; kfree(args); return ret; } |
98d377a08
|
1993 |
/* |
ac8e9819d
|
1994 1995 1996 |
* Search INODE_REFs to identify path name of 'dirid' directory * in a 'tree_id' tree. and sets path name to 'name'. */ |
98d377a08
|
1997 1998 1999 2000 2001 |
static noinline int btrfs_search_path_in_tree(struct btrfs_fs_info *info, u64 tree_id, u64 dirid, char *name) { struct btrfs_root *root; struct btrfs_key key; |
ac8e9819d
|
2002 |
char *ptr; |
98d377a08
|
2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 |
int ret = -1; int slot; int len; int total_len = 0; struct btrfs_inode_ref *iref; struct extent_buffer *l; struct btrfs_path *path; if (dirid == BTRFS_FIRST_FREE_OBJECTID) { name[0]='\0'; return 0; } path = btrfs_alloc_path(); if (!path) return -ENOMEM; |
ac8e9819d
|
2019 |
ptr = &name[BTRFS_INO_LOOKUP_PATH_MAX]; |
98d377a08
|
2020 2021 2022 2023 2024 2025 |
key.objectid = tree_id; key.type = BTRFS_ROOT_ITEM_KEY; key.offset = (u64)-1; root = btrfs_read_fs_root_no_name(info, &key); if (IS_ERR(root)) { |
efe120a06
|
2026 2027 |
printk(KERN_ERR "BTRFS: could not find root %llu ", tree_id); |
8ad6fcab5
|
2028 2029 |
ret = -ENOENT; goto out; |
98d377a08
|
2030 2031 2032 2033 |
} key.objectid = dirid; key.type = BTRFS_INODE_REF_KEY; |
8ad6fcab5
|
2034 |
key.offset = (u64)-1; |
98d377a08
|
2035 |
|
678712545
|
2036 |
while (1) { |
98d377a08
|
2037 2038 2039 |
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); if (ret < 0) goto out; |
18674c6cc
|
2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 |
else if (ret > 0) { ret = btrfs_previous_item(root, path, dirid, BTRFS_INODE_REF_KEY); if (ret < 0) goto out; else if (ret > 0) { ret = -ENOENT; goto out; } } |
98d377a08
|
2050 2051 2052 2053 |
l = path->nodes[0]; slot = path->slots[0]; btrfs_item_key_to_cpu(l, &key, slot); |
98d377a08
|
2054 2055 2056 2057 |
iref = btrfs_item_ptr(l, slot, struct btrfs_inode_ref); len = btrfs_inode_ref_name_len(l, iref); ptr -= len + 1; total_len += len + 1; |
a696cf352
|
2058 2059 |
if (ptr < name) { ret = -ENAMETOOLONG; |
98d377a08
|
2060 |
goto out; |
a696cf352
|
2061 |
} |
98d377a08
|
2062 2063 |
*(ptr + len) = '/'; |
678712545
|
2064 |
read_extent_buffer(l, ptr, (unsigned long)(iref + 1), len); |
98d377a08
|
2065 2066 2067 |
if (key.offset == BTRFS_FIRST_FREE_OBJECTID) break; |
b3b4aa74b
|
2068 |
btrfs_release_path(path); |
98d377a08
|
2069 |
key.objectid = key.offset; |
8ad6fcab5
|
2070 |
key.offset = (u64)-1; |
98d377a08
|
2071 |
dirid = key.objectid; |
98d377a08
|
2072 |
} |
77906a507
|
2073 |
memmove(name, ptr, total_len); |
678712545
|
2074 |
name[total_len] = '\0'; |
98d377a08
|
2075 2076 2077 |
ret = 0; out: btrfs_free_path(path); |
ac8e9819d
|
2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 |
return ret; } static noinline int btrfs_ioctl_ino_lookup(struct file *file, void __user *argp) { struct btrfs_ioctl_ino_lookup_args *args; struct inode *inode; int ret; if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
2354d08fe
|
2090 2091 2092 |
args = memdup_user(argp, sizeof(*args)); if (IS_ERR(args)) return PTR_ERR(args); |
c2b96929e
|
2093 |
|
496ad9aa8
|
2094 |
inode = file_inode(file); |
ac8e9819d
|
2095 |
|
1b53ac4d1
|
2096 2097 |
if (args->treeid == 0) args->treeid = BTRFS_I(inode)->root->root_key.objectid; |
ac8e9819d
|
2098 2099 2100 2101 2102 2103 2104 2105 |
ret = btrfs_search_path_in_tree(BTRFS_I(inode)->root->fs_info, args->treeid, args->objectid, args->name); if (ret == 0 && copy_to_user(argp, args, sizeof(*args))) ret = -EFAULT; kfree(args); |
98d377a08
|
2106 2107 |
return ret; } |
76dda93c6
|
2108 2109 2110 |
static noinline int btrfs_ioctl_snap_destroy(struct file *file, void __user *arg) { |
54563d41a
|
2111 |
struct dentry *parent = file->f_path.dentry; |
76dda93c6
|
2112 2113 2114 2115 2116 2117 2118 |
struct dentry *dentry; struct inode *dir = parent->d_inode; struct inode *inode; struct btrfs_root *root = BTRFS_I(dir)->root; struct btrfs_root *dest = NULL; struct btrfs_ioctl_vol_args *vol_args; struct btrfs_trans_handle *trans; |
c58aaad2a
|
2119 2120 |
struct btrfs_block_rsv block_rsv; u64 qgroup_reserved; |
76dda93c6
|
2121 2122 2123 |
int namelen; int ret; int err = 0; |
76dda93c6
|
2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 |
vol_args = memdup_user(arg, sizeof(*vol_args)); if (IS_ERR(vol_args)) return PTR_ERR(vol_args); vol_args->name[BTRFS_PATH_NAME_MAX] = '\0'; namelen = strlen(vol_args->name); if (strchr(vol_args->name, '/') || strncmp(vol_args->name, "..", namelen) == 0) { err = -EINVAL; goto out; } |
a561be710
|
2135 |
err = mnt_want_write_file(file); |
76dda93c6
|
2136 2137 |
if (err) goto out; |
5c50c9b89
|
2138 2139 |
err = mutex_lock_killable_nested(&dir->i_mutex, I_MUTEX_PARENT); if (err == -EINTR) |
e43f998e4
|
2140 |
goto out_drop_write; |
76dda93c6
|
2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 |
dentry = lookup_one_len(vol_args->name, parent, namelen); if (IS_ERR(dentry)) { err = PTR_ERR(dentry); goto out_unlock_dir; } if (!dentry->d_inode) { err = -ENOENT; goto out_dput; } inode = dentry->d_inode; |
4260f7c75
|
2153 |
dest = BTRFS_I(inode)->root; |
678712545
|
2154 |
if (!capable(CAP_SYS_ADMIN)) { |
4260f7c75
|
2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 |
/* * Regular user. Only allow this with a special mount * option, when the user has write+exec access to the * subvol root, and when rmdir(2) would have been * allowed. * * Note that this is _not_ check that the subvol is * empty or doesn't contain data that we wouldn't * otherwise be able to delete. * * Users who want to delete empty subvols should try * rmdir(2). */ err = -EPERM; if (!btrfs_test_opt(root, USER_SUBVOL_RM_ALLOWED)) goto out_dput; /* * Do not allow deletion if the parent dir is the same * as the dir to be deleted. That means the ioctl * must be called on the dentry referencing the root * of the subvol, not a random directory contained * within it. */ err = -EINVAL; if (root == dest) goto out_dput; err = inode_permission(inode, MAY_WRITE | MAY_EXEC); if (err) goto out_dput; |
4260f7c75
|
2186 |
} |
5c39da5b6
|
2187 2188 2189 2190 |
/* check if subvolume may be deleted by a user */ err = btrfs_may_delete(dir, dentry, 1); if (err) goto out_dput; |
33345d015
|
2191 |
if (btrfs_ino(inode) != BTRFS_FIRST_FREE_OBJECTID) { |
76dda93c6
|
2192 2193 2194 |
err = -EINVAL; goto out_dput; } |
76dda93c6
|
2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 |
mutex_lock(&inode->i_mutex); err = d_invalidate(dentry); if (err) goto out_unlock; down_write(&root->fs_info->subvol_sem); err = may_destroy_subvol(dest); if (err) goto out_up_write; |
c58aaad2a
|
2205 2206 2207 2208 2209 2210 |
btrfs_init_block_rsv(&block_rsv, BTRFS_BLOCK_RSV_TEMP); /* * One for dir inode, two for dir entries, two for root * ref/backref. */ err = btrfs_subvolume_reserve_metadata(root, &block_rsv, |
ee3441b49
|
2211 |
5, &qgroup_reserved, true); |
c58aaad2a
|
2212 2213 |
if (err) goto out_up_write; |
a22285a6a
|
2214 2215 2216 |
trans = btrfs_start_transaction(root, 0); if (IS_ERR(trans)) { err = PTR_ERR(trans); |
c58aaad2a
|
2217 |
goto out_release; |
a22285a6a
|
2218 |
} |
c58aaad2a
|
2219 2220 |
trans->block_rsv = &block_rsv; trans->bytes_reserved = block_rsv.size; |
a22285a6a
|
2221 |
|
76dda93c6
|
2222 2223 2224 2225 |
ret = btrfs_unlink_subvol(trans, root, dir, dest->root_key.objectid, dentry->d_name.name, dentry->d_name.len); |
79787eaab
|
2226 2227 2228 2229 2230 |
if (ret) { err = ret; btrfs_abort_transaction(trans, root, ret); goto out_end_trans; } |
76dda93c6
|
2231 2232 2233 2234 2235 2236 2237 |
btrfs_record_root_in_trans(trans, dest); memset(&dest->root_item.drop_progress, 0, sizeof(dest->root_item.drop_progress)); dest->root_item.drop_level = 0; btrfs_set_root_refs(&dest->root_item, 0); |
d68fc57b7
|
2238 2239 2240 2241 |
if (!xchg(&dest->orphan_item_inserted, 1)) { ret = btrfs_insert_orphan_item(trans, root->fs_info->tree_root, dest->root_key.objectid); |
79787eaab
|
2242 2243 2244 2245 2246 |
if (ret) { btrfs_abort_transaction(trans, root, ret); err = ret; goto out_end_trans; } |
d68fc57b7
|
2247 |
} |
dd5f9615f
|
2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 |
ret = btrfs_uuid_tree_rem(trans, root->fs_info->uuid_root, dest->root_item.uuid, BTRFS_UUID_KEY_SUBVOL, dest->root_key.objectid); if (ret && ret != -ENOENT) { btrfs_abort_transaction(trans, root, ret); err = ret; goto out_end_trans; } if (!btrfs_is_empty_uuid(dest->root_item.received_uuid)) { ret = btrfs_uuid_tree_rem(trans, root->fs_info->uuid_root, dest->root_item.received_uuid, BTRFS_UUID_KEY_RECEIVED_SUBVOL, dest->root_key.objectid); if (ret && ret != -ENOENT) { btrfs_abort_transaction(trans, root, ret); err = ret; goto out_end_trans; } } |
79787eaab
|
2268 |
out_end_trans: |
c58aaad2a
|
2269 2270 |
trans->block_rsv = NULL; trans->bytes_reserved = 0; |
531cb13f1
|
2271 |
ret = btrfs_end_transaction(trans, root); |
79787eaab
|
2272 2273 |
if (ret && !err) err = ret; |
76dda93c6
|
2274 |
inode->i_flags |= S_DEAD; |
c58aaad2a
|
2275 2276 |
out_release: btrfs_subvolume_release_metadata(root, &block_rsv, qgroup_reserved); |
76dda93c6
|
2277 2278 2279 2280 2281 |
out_up_write: up_write(&root->fs_info->subvol_sem); out_unlock: mutex_unlock(&inode->i_mutex); if (!err) { |
efefb1438
|
2282 |
shrink_dcache_sb(root->fs_info->sb); |
76dda93c6
|
2283 2284 |
btrfs_invalidate_inodes(dest); d_delete(dentry); |
fa6ac8765
|
2285 2286 2287 2288 2289 2290 |
/* the last ref */ if (dest->cache_inode) { iput(dest->cache_inode); dest->cache_inode = NULL; } |
76dda93c6
|
2291 2292 2293 2294 2295 |
} out_dput: dput(dentry); out_unlock_dir: mutex_unlock(&dir->i_mutex); |
e43f998e4
|
2296 |
out_drop_write: |
2a79f17e4
|
2297 |
mnt_drop_write_file(file); |
76dda93c6
|
2298 2299 2300 2301 |
out: kfree(vol_args); return err; } |
1e701a329
|
2302 |
static int btrfs_ioctl_defrag(struct file *file, void __user *argp) |
f46b5a66b
|
2303 |
{ |
496ad9aa8
|
2304 |
struct inode *inode = file_inode(file); |
f46b5a66b
|
2305 |
struct btrfs_root *root = BTRFS_I(inode)->root; |
1e701a329
|
2306 |
struct btrfs_ioctl_defrag_range_args *range; |
c146afad2
|
2307 |
int ret; |
25122d15e
|
2308 2309 2310 |
ret = mnt_want_write_file(file); if (ret) return ret; |
b83cc9693
|
2311 |
|
25122d15e
|
2312 2313 2314 |
if (btrfs_root_readonly(root)) { ret = -EROFS; goto out; |
5ac00addc
|
2315 |
} |
f46b5a66b
|
2316 2317 2318 |
switch (inode->i_mode & S_IFMT) { case S_IFDIR: |
e441d54de
|
2319 2320 2321 2322 |
if (!capable(CAP_SYS_ADMIN)) { ret = -EPERM; goto out; } |
de78b51a2
|
2323 |
ret = btrfs_defrag_root(root); |
8929ecfa5
|
2324 2325 |
if (ret) goto out; |
de78b51a2
|
2326 |
ret = btrfs_defrag_root(root->fs_info->extent_root); |
f46b5a66b
|
2327 2328 |
break; case S_IFREG: |
e441d54de
|
2329 2330 2331 2332 |
if (!(file->f_mode & FMODE_WRITE)) { ret = -EINVAL; goto out; } |
1e701a329
|
2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 |
range = kzalloc(sizeof(*range), GFP_KERNEL); if (!range) { ret = -ENOMEM; goto out; } if (argp) { if (copy_from_user(range, argp, sizeof(*range))) { ret = -EFAULT; kfree(range); |
683be16eb
|
2345 |
goto out; |
1e701a329
|
2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 |
} /* compression requires us to start the IO */ if ((range->flags & BTRFS_DEFRAG_RANGE_COMPRESS)) { range->flags |= BTRFS_DEFRAG_RANGE_START_IO; range->extent_thresh = (u32)-1; } } else { /* the rest are all set to zero by kzalloc */ range->len = (u64)-1; } |
496ad9aa8
|
2356 |
ret = btrfs_defrag_file(file_inode(file), file, |
4cb5300bc
|
2357 2358 2359 |
range, 0, 0); if (ret > 0) ret = 0; |
1e701a329
|
2360 |
kfree(range); |
f46b5a66b
|
2361 |
break; |
8929ecfa5
|
2362 2363 |
default: ret = -EINVAL; |
f46b5a66b
|
2364 |
} |
e441d54de
|
2365 |
out: |
25122d15e
|
2366 |
mnt_drop_write_file(file); |
e441d54de
|
2367 |
return ret; |
f46b5a66b
|
2368 |
} |
b2950863c
|
2369 |
static long btrfs_ioctl_add_dev(struct btrfs_root *root, void __user *arg) |
f46b5a66b
|
2370 2371 2372 |
{ struct btrfs_ioctl_vol_args *vol_args; int ret; |
e441d54de
|
2373 2374 |
if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
5ac00addc
|
2375 2376 |
if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running, 1)) { |
e57138b3e
|
2377 |
return BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS; |
c9e9f97bd
|
2378 |
} |
5ac00addc
|
2379 |
mutex_lock(&root->fs_info->volume_mutex); |
dae7b665c
|
2380 |
vol_args = memdup_user(arg, sizeof(*vol_args)); |
c9e9f97bd
|
2381 2382 2383 2384 |
if (IS_ERR(vol_args)) { ret = PTR_ERR(vol_args); goto out; } |
f46b5a66b
|
2385 |
|
5516e5957
|
2386 |
vol_args->name[BTRFS_PATH_NAME_MAX] = '\0'; |
f46b5a66b
|
2387 |
ret = btrfs_init_new_device(root, vol_args->name); |
f46b5a66b
|
2388 |
kfree(vol_args); |
c9e9f97bd
|
2389 2390 |
out: mutex_unlock(&root->fs_info->volume_mutex); |
5ac00addc
|
2391 |
atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0); |
f46b5a66b
|
2392 2393 |
return ret; } |
da24927b1
|
2394 |
static long btrfs_ioctl_rm_dev(struct file *file, void __user *arg) |
f46b5a66b
|
2395 |
{ |
496ad9aa8
|
2396 |
struct btrfs_root *root = BTRFS_I(file_inode(file))->root; |
f46b5a66b
|
2397 2398 |
struct btrfs_ioctl_vol_args *vol_args; int ret; |
e441d54de
|
2399 2400 |
if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
da24927b1
|
2401 2402 2403 |
ret = mnt_want_write_file(file); if (ret) return ret; |
c146afad2
|
2404 |
|
dae7b665c
|
2405 |
vol_args = memdup_user(arg, sizeof(*vol_args)); |
c9e9f97bd
|
2406 2407 2408 2409 |
if (IS_ERR(vol_args)) { ret = PTR_ERR(vol_args); goto out; } |
f46b5a66b
|
2410 |
|
5516e5957
|
2411 |
vol_args->name[BTRFS_PATH_NAME_MAX] = '\0'; |
f46b5a66b
|
2412 |
|
183860f6a
|
2413 2414 2415 2416 2417 2418 2419 2420 |
if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running, 1)) { ret = BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS; goto out; } mutex_lock(&root->fs_info->volume_mutex); ret = btrfs_rm_device(root, vol_args->name); |
c9e9f97bd
|
2421 |
mutex_unlock(&root->fs_info->volume_mutex); |
5ac00addc
|
2422 |
atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0); |
183860f6a
|
2423 2424 2425 |
out: kfree(vol_args); |
4ac20c70b
|
2426 |
mnt_drop_write_file(file); |
f46b5a66b
|
2427 2428 |
return ret; } |
475f63874
|
2429 2430 |
static long btrfs_ioctl_fs_info(struct btrfs_root *root, void __user *arg) { |
027ed2f00
|
2431 |
struct btrfs_ioctl_fs_info_args *fi_args; |
475f63874
|
2432 2433 2434 |
struct btrfs_device *device; struct btrfs_device *next; struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices; |
027ed2f00
|
2435 |
int ret = 0; |
475f63874
|
2436 2437 2438 |
if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
027ed2f00
|
2439 2440 2441 |
fi_args = kzalloc(sizeof(*fi_args), GFP_KERNEL); if (!fi_args) return -ENOMEM; |
f71717502
|
2442 |
mutex_lock(&fs_devices->device_list_mutex); |
027ed2f00
|
2443 2444 |
fi_args->num_devices = fs_devices->num_devices; memcpy(&fi_args->fsid, root->fs_info->fsid, sizeof(fi_args->fsid)); |
475f63874
|
2445 |
|
475f63874
|
2446 |
list_for_each_entry_safe(device, next, &fs_devices->devices, dev_list) { |
027ed2f00
|
2447 2448 |
if (device->devid > fi_args->max_id) fi_args->max_id = device->devid; |
475f63874
|
2449 2450 |
} mutex_unlock(&fs_devices->device_list_mutex); |
027ed2f00
|
2451 2452 |
if (copy_to_user(arg, fi_args, sizeof(*fi_args))) ret = -EFAULT; |
475f63874
|
2453 |
|
027ed2f00
|
2454 2455 |
kfree(fi_args); return ret; |
475f63874
|
2456 2457 2458 2459 2460 2461 2462 2463 2464 |
} static long btrfs_ioctl_dev_info(struct btrfs_root *root, void __user *arg) { struct btrfs_ioctl_dev_info_args *di_args; struct btrfs_device *dev; struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices; int ret = 0; char *s_uuid = NULL; |
475f63874
|
2465 2466 2467 2468 2469 2470 2471 |
if (!capable(CAP_SYS_ADMIN)) return -EPERM; di_args = memdup_user(arg, sizeof(*di_args)); if (IS_ERR(di_args)) return PTR_ERR(di_args); |
dd5f9615f
|
2472 |
if (!btrfs_is_empty_uuid(di_args->uuid)) |
475f63874
|
2473 2474 2475 |
s_uuid = di_args->uuid; mutex_lock(&fs_devices->device_list_mutex); |
aa1b8cd40
|
2476 |
dev = btrfs_find_device(root->fs_info, di_args->devid, s_uuid, NULL); |
475f63874
|
2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 |
if (!dev) { ret = -ENODEV; goto out; } di_args->devid = dev->devid; di_args->bytes_used = dev->bytes_used; di_args->total_bytes = dev->total_bytes; memcpy(di_args->uuid, dev->uuid, sizeof(di_args->uuid)); |
a27202fbe
|
2487 |
if (dev->name) { |
606686eea
|
2488 2489 2490 2491 2492 2493 |
struct rcu_string *name; rcu_read_lock(); name = rcu_dereference(dev->name); strncpy(di_args->path, name->str, sizeof(di_args->path)); rcu_read_unlock(); |
a27202fbe
|
2494 2495 |
di_args->path[sizeof(di_args->path) - 1] = 0; } else { |
99ba55ad6
|
2496 |
di_args->path[0] = '\0'; |
a27202fbe
|
2497 |
} |
475f63874
|
2498 2499 |
out: |
55793c0d0
|
2500 |
mutex_unlock(&fs_devices->device_list_mutex); |
475f63874
|
2501 2502 2503 2504 2505 2506 |
if (ret == 0 && copy_to_user(arg, di_args, sizeof(*di_args))) ret = -EFAULT; kfree(di_args); return ret; } |
416161db9
|
2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 |
static struct page *extent_same_get_page(struct inode *inode, u64 off) { struct page *page; pgoff_t index; struct extent_io_tree *tree = &BTRFS_I(inode)->io_tree; index = off >> PAGE_CACHE_SHIFT; page = grab_cache_page(inode->i_mapping, index); if (!page) return NULL; if (!PageUptodate(page)) { if (extent_read_full_page_nolock(tree, page, btrfs_get_extent, 0)) return NULL; lock_page(page); if (!PageUptodate(page)) { unlock_page(page); page_cache_release(page); return NULL; } } unlock_page(page); return page; } |
77fe20dc6
|
2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 |
static inline void lock_extent_range(struct inode *inode, u64 off, u64 len) { /* do any pending delalloc/csum calc on src, one way or another, and lock file content */ while (1) { struct btrfs_ordered_extent *ordered; lock_extent(&BTRFS_I(inode)->io_tree, off, off + len - 1); ordered = btrfs_lookup_first_ordered_extent(inode, off + len - 1); if (!ordered && !test_range_bit(&BTRFS_I(inode)->io_tree, off, off + len - 1, EXTENT_DELALLOC, 0, NULL)) break; unlock_extent(&BTRFS_I(inode)->io_tree, off, off + len - 1); if (ordered) btrfs_put_ordered_extent(ordered); btrfs_wait_ordered_range(inode, off, len); } } |
416161db9
|
2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 |
static void btrfs_double_unlock(struct inode *inode1, u64 loff1, struct inode *inode2, u64 loff2, u64 len) { unlock_extent(&BTRFS_I(inode1)->io_tree, loff1, loff1 + len - 1); unlock_extent(&BTRFS_I(inode2)->io_tree, loff2, loff2 + len - 1); mutex_unlock(&inode1->i_mutex); mutex_unlock(&inode2->i_mutex); } static void btrfs_double_lock(struct inode *inode1, u64 loff1, struct inode *inode2, u64 loff2, u64 len) { if (inode1 < inode2) { swap(inode1, inode2); swap(loff1, loff2); } mutex_lock_nested(&inode1->i_mutex, I_MUTEX_PARENT); lock_extent_range(inode1, loff1, len); if (inode1 != inode2) { mutex_lock_nested(&inode2->i_mutex, I_MUTEX_CHILD); lock_extent_range(inode2, loff2, len); } } static int btrfs_cmp_data(struct inode *src, u64 loff, struct inode *dst, u64 dst_loff, u64 len) { int ret = 0; struct page *src_page, *dst_page; unsigned int cmp_len = PAGE_CACHE_SIZE; void *addr, *dst_addr; while (len) { if (len < PAGE_CACHE_SIZE) cmp_len = len; src_page = extent_same_get_page(src, loff); if (!src_page) return -EINVAL; dst_page = extent_same_get_page(dst, dst_loff); if (!dst_page) { page_cache_release(src_page); return -EINVAL; } addr = kmap_atomic(src_page); dst_addr = kmap_atomic(dst_page); flush_dcache_page(src_page); flush_dcache_page(dst_page); if (memcmp(addr, dst_addr, cmp_len)) ret = BTRFS_SAME_DATA_DIFFERS; kunmap_atomic(addr); kunmap_atomic(dst_addr); page_cache_release(src_page); page_cache_release(dst_page); if (ret) break; loff += cmp_len; dst_loff += cmp_len; len -= cmp_len; } return ret; } static int extent_same_check_offsets(struct inode *inode, u64 off, u64 len) { u64 bs = BTRFS_I(inode)->root->fs_info->sb->s_blocksize; if (off + len > inode->i_size || off + len < off) return -EINVAL; /* Check that we are block aligned - btrfs_clone() requires this */ if (!IS_ALIGNED(off, bs) || !IS_ALIGNED(off + len, bs)) return -EINVAL; return 0; } static int btrfs_extent_same(struct inode *src, u64 loff, u64 len, struct inode *dst, u64 dst_loff) { int ret; /* * btrfs_clone() can't handle extents in the same file * yet. Once that works, we can drop this check and replace it * with a check for the same inode, but overlapping extents. */ if (src == dst) return -EINVAL; btrfs_double_lock(src, loff, dst, dst_loff, len); ret = extent_same_check_offsets(src, loff, len); if (ret) goto out_unlock; ret = extent_same_check_offsets(dst, dst_loff, len); if (ret) goto out_unlock; /* don't make the dst file partly checksummed */ if ((BTRFS_I(src)->flags & BTRFS_INODE_NODATASUM) != (BTRFS_I(dst)->flags & BTRFS_INODE_NODATASUM)) { ret = -EINVAL; goto out_unlock; } ret = btrfs_cmp_data(src, loff, dst, dst_loff, len); if (ret == 0) ret = btrfs_clone(src, dst, loff, len, len, dst_loff); out_unlock: btrfs_double_unlock(src, loff, dst, dst_loff, len); return ret; } #define BTRFS_MAX_DEDUPE_LEN (16 * 1024 * 1024) static long btrfs_ioctl_file_extent_same(struct file *file, |
1c1c8747c
|
2680 |
struct btrfs_ioctl_same_args __user *argp) |
416161db9
|
2681 |
{ |
cbf8b8ca3
|
2682 2683 |
struct btrfs_ioctl_same_args *same; struct btrfs_ioctl_same_extent_info *info; |
1c1c8747c
|
2684 |
struct inode *src = file_inode(file); |
416161db9
|
2685 2686 2687 2688 |
u64 off; u64 len; int i; int ret; |
cbf8b8ca3
|
2689 |
unsigned long size; |
416161db9
|
2690 2691 |
u64 bs = BTRFS_I(src)->root->fs_info->sb->s_blocksize; bool is_admin = capable(CAP_SYS_ADMIN); |
1c1c8747c
|
2692 |
u16 count; |
416161db9
|
2693 2694 2695 2696 2697 2698 2699 |
if (!(file->f_mode & FMODE_READ)) return -EINVAL; ret = mnt_want_write_file(file); if (ret) return ret; |
1c1c8747c
|
2700 |
if (get_user(count, &argp->dest_count)) { |
416161db9
|
2701 2702 2703 |
ret = -EFAULT; goto out; } |
1c1c8747c
|
2704 |
size = offsetof(struct btrfs_ioctl_same_args __user, info[count]); |
cbf8b8ca3
|
2705 |
|
1c1c8747c
|
2706 |
same = memdup_user(argp, size); |
cbf8b8ca3
|
2707 |
|
229eed434
|
2708 2709 |
if (IS_ERR(same)) { ret = PTR_ERR(same); |
cbf8b8ca3
|
2710 2711 2712 2713 2714 |
goto out; } off = same->logical_offset; len = same->length; |
416161db9
|
2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 |
/* * Limit the total length we will dedupe for each operation. * This is intended to bound the total time spent in this * ioctl to something sane. */ if (len > BTRFS_MAX_DEDUPE_LEN) len = BTRFS_MAX_DEDUPE_LEN; if (WARN_ON_ONCE(bs < PAGE_CACHE_SIZE)) { /* * Btrfs does not support blocksize < page_size. As a * result, btrfs_cmp_data() won't correctly handle * this situation without an update. */ ret = -EINVAL; goto out; } ret = -EISDIR; if (S_ISDIR(src->i_mode)) goto out; ret = -EACCES; if (!S_ISREG(src->i_mode)) goto out; |
cbf8b8ca3
|
2741 |
/* pre-format output fields to sane values */ |
1c1c8747c
|
2742 |
for (i = 0; i < count; i++) { |
cbf8b8ca3
|
2743 2744 2745 |
same->info[i].bytes_deduped = 0ULL; same->info[i].status = 0; } |
416161db9
|
2746 |
|
1c1c8747c
|
2747 2748 2749 2750 |
for (i = 0, info = same->info; i < count; i++, info++) { struct inode *dst; struct fd dst_file = fdget(info->fd); if (!dst_file.file) { |
cbf8b8ca3
|
2751 |
info->status = -EBADF; |
1c1c8747c
|
2752 |
continue; |
416161db9
|
2753 |
} |
1c1c8747c
|
2754 |
dst = file_inode(dst_file.file); |
416161db9
|
2755 |
|
1c1c8747c
|
2756 |
if (!(is_admin || (dst_file.file->f_mode & FMODE_WRITE))) { |
cbf8b8ca3
|
2757 |
info->status = -EINVAL; |
1c1c8747c
|
2758 2759 2760 |
} else if (file->f_path.mnt != dst_file.file->f_path.mnt) { info->status = -EXDEV; } else if (S_ISDIR(dst->i_mode)) { |
cbf8b8ca3
|
2761 |
info->status = -EISDIR; |
1c1c8747c
|
2762 |
} else if (!S_ISREG(dst->i_mode)) { |
cbf8b8ca3
|
2763 |
info->status = -EACCES; |
1c1c8747c
|
2764 2765 2766 2767 2768 |
} else { info->status = btrfs_extent_same(src, off, len, dst, info->logical_offset); if (info->status == 0) info->bytes_deduped += len; |
416161db9
|
2769 |
} |
1c1c8747c
|
2770 |
fdput(dst_file); |
416161db9
|
2771 |
} |
cbf8b8ca3
|
2772 2773 2774 |
ret = copy_to_user(argp, same, size); if (ret) ret = -EFAULT; |
416161db9
|
2775 2776 2777 2778 |
out: mnt_drop_write_file(file); return ret; } |
32b7c687c
|
2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 |
/** * btrfs_clone() - clone a range from inode file to another * * @src: Inode to clone from * @inode: Inode to clone to * @off: Offset within source to start clone from * @olen: Original length, passed by user, of range to clone * @olen_aligned: Block-aligned value of olen, extent_same uses * identical values here * @destoff: Offset within @inode to start clone */ static int btrfs_clone(struct inode *src, struct inode *inode, u64 off, u64 olen, u64 olen_aligned, u64 destoff) |
f46b5a66b
|
2792 |
{ |
f46b5a66b
|
2793 |
struct btrfs_root *root = BTRFS_I(inode)->root; |
32b7c687c
|
2794 |
struct btrfs_path *path = NULL; |
f46b5a66b
|
2795 |
struct extent_buffer *leaf; |
32b7c687c
|
2796 2797 |
struct btrfs_trans_handle *trans; char *buf = NULL; |
ae01a0abf
|
2798 |
struct btrfs_key key; |
f46b5a66b
|
2799 2800 |
u32 nritems; int slot; |
ae01a0abf
|
2801 |
int ret; |
32b7c687c
|
2802 |
u64 len = olen_aligned; |
ae01a0abf
|
2803 2804 2805 2806 |
ret = -ENOMEM; buf = vmalloc(btrfs_level_size(root, 0)); if (!buf) |
32b7c687c
|
2807 |
return ret; |
ae01a0abf
|
2808 2809 2810 2811 |
path = btrfs_alloc_path(); if (!path) { vfree(buf); |
32b7c687c
|
2812 |
return ret; |
d525e8ab0
|
2813 |
} |
32b7c687c
|
2814 |
path->reada = 2; |
c5c9cd4d1
|
2815 |
/* clone data */ |
33345d015
|
2816 |
key.objectid = btrfs_ino(src); |
ae01a0abf
|
2817 2818 |
key.type = BTRFS_EXTENT_DATA_KEY; key.offset = 0; |
f46b5a66b
|
2819 2820 2821 2822 2823 2824 |
while (1) { /* * note the key will change type as we walk through the * tree. */ |
e4355f34e
|
2825 |
path->leave_spinning = 1; |
362a20c5e
|
2826 2827 |
ret = btrfs_search_slot(NULL, BTRFS_I(src)->root, &key, path, 0, 0); |
f46b5a66b
|
2828 2829 |
if (ret < 0) goto out; |
ae01a0abf
|
2830 |
nritems = btrfs_header_nritems(path->nodes[0]); |
e4355f34e
|
2831 |
process_slot: |
ae01a0abf
|
2832 |
if (path->slots[0] >= nritems) { |
362a20c5e
|
2833 |
ret = btrfs_next_leaf(BTRFS_I(src)->root, path); |
f46b5a66b
|
2834 2835 2836 2837 |
if (ret < 0) goto out; if (ret > 0) break; |
ae01a0abf
|
2838 |
nritems = btrfs_header_nritems(path->nodes[0]); |
f46b5a66b
|
2839 2840 2841 |
} leaf = path->nodes[0]; slot = path->slots[0]; |
f46b5a66b
|
2842 |
|
ae01a0abf
|
2843 |
btrfs_item_key_to_cpu(leaf, &key, slot); |
d20f7043f
|
2844 |
if (btrfs_key_type(&key) > BTRFS_EXTENT_DATA_KEY || |
33345d015
|
2845 |
key.objectid != btrfs_ino(src)) |
f46b5a66b
|
2846 |
break; |
c5c9cd4d1
|
2847 2848 2849 |
if (btrfs_key_type(&key) == BTRFS_EXTENT_DATA_KEY) { struct btrfs_file_extent_item *extent; int type; |
31840ae1a
|
2850 2851 |
u32 size; struct btrfs_key new_key; |
c5c9cd4d1
|
2852 2853 2854 |
u64 disko = 0, diskl = 0; u64 datao = 0, datal = 0; u8 comp; |
b5384d48f
|
2855 |
u64 endoff; |
31840ae1a
|
2856 |
|
c5c9cd4d1
|
2857 2858 2859 2860 |
extent = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item); comp = btrfs_file_extent_compression(leaf, extent); type = btrfs_file_extent_type(leaf, extent); |
c8a894d77
|
2861 2862 |
if (type == BTRFS_FILE_EXTENT_REG || type == BTRFS_FILE_EXTENT_PREALLOC) { |
d397712bc
|
2863 2864 2865 2866 |
disko = btrfs_file_extent_disk_bytenr(leaf, extent); diskl = btrfs_file_extent_disk_num_bytes(leaf, extent); |
c5c9cd4d1
|
2867 |
datao = btrfs_file_extent_offset(leaf, extent); |
d397712bc
|
2868 2869 |
datal = btrfs_file_extent_num_bytes(leaf, extent); |
c5c9cd4d1
|
2870 2871 2872 2873 2874 |
} else if (type == BTRFS_FILE_EXTENT_INLINE) { /* take upper bound, may be compressed */ datal = btrfs_file_extent_ram_bytes(leaf, extent); } |
31840ae1a
|
2875 |
|
050006a75
|
2876 |
if (key.offset + datal <= off || |
e4355f34e
|
2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 |
key.offset >= off + len - 1) { path->slots[0]++; goto process_slot; } size = btrfs_item_size_nr(leaf, slot); read_extent_buffer(leaf, buf, btrfs_item_ptr_offset(leaf, slot), size); btrfs_release_path(path); path->leave_spinning = 0; |
c5c9cd4d1
|
2889 |
|
31840ae1a
|
2890 |
memcpy(&new_key, &key, sizeof(new_key)); |
33345d015
|
2891 |
new_key.objectid = btrfs_ino(inode); |
4d728ec7a
|
2892 2893 2894 2895 |
if (off <= key.offset) new_key.offset = key.offset + destoff - off; else new_key.offset = destoff; |
31840ae1a
|
2896 |
|
b6f3409b2
|
2897 2898 2899 2900 2901 2902 |
/* * 1 - adjusting old extent (we may have to split it) * 1 - add new extent * 1 - inode update */ trans = btrfs_start_transaction(root, 3); |
a22285a6a
|
2903 2904 2905 2906 |
if (IS_ERR(trans)) { ret = PTR_ERR(trans); goto out; } |
c8a894d77
|
2907 2908 |
if (type == BTRFS_FILE_EXTENT_REG || type == BTRFS_FILE_EXTENT_PREALLOC) { |
d72c0842f
|
2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 |
/* * a | --- range to clone ---| b * | ------------- extent ------------- | */ /* substract range b */ if (key.offset + datal > off + len) datal = off + len - key.offset; /* substract range a */ |
a22285a6a
|
2919 2920 2921 2922 |
if (off > key.offset) { datao += off - key.offset; datal -= off - key.offset; } |
5dc562c54
|
2923 |
ret = btrfs_drop_extents(trans, root, inode, |
a22285a6a
|
2924 2925 |
new_key.offset, new_key.offset + datal, |
2671485d3
|
2926 |
1); |
79787eaab
|
2927 |
if (ret) { |
00fdf13a2
|
2928 2929 2930 |
if (ret != -EINVAL) btrfs_abort_transaction(trans, root, ret); |
79787eaab
|
2931 2932 2933 |
btrfs_end_transaction(trans, root); goto out; } |
a22285a6a
|
2934 |
|
c5c9cd4d1
|
2935 2936 |
ret = btrfs_insert_empty_item(trans, root, path, &new_key, size); |
79787eaab
|
2937 2938 2939 2940 2941 2942 |
if (ret) { btrfs_abort_transaction(trans, root, ret); btrfs_end_transaction(trans, root); goto out; } |
c5c9cd4d1
|
2943 2944 2945 2946 |
leaf = path->nodes[0]; slot = path->slots[0]; write_extent_buffer(leaf, buf, |
31840ae1a
|
2947 2948 |
btrfs_item_ptr_offset(leaf, slot), size); |
ae01a0abf
|
2949 |
|
c5c9cd4d1
|
2950 |
extent = btrfs_item_ptr(leaf, slot, |
f46b5a66b
|
2951 |
struct btrfs_file_extent_item); |
c5c9cd4d1
|
2952 |
|
c5c9cd4d1
|
2953 2954 2955 |
/* disko == 0 means it's a hole */ if (!disko) datao = 0; |
c5c9cd4d1
|
2956 2957 2958 2959 2960 2961 2962 |
btrfs_set_file_extent_offset(leaf, extent, datao); btrfs_set_file_extent_num_bytes(leaf, extent, datal); if (disko) { inode_add_bytes(inode, datal); |
ae01a0abf
|
2963 |
ret = btrfs_inc_extent_ref(trans, root, |
5d4f98a28
|
2964 2965 |
disko, diskl, 0, root->root_key.objectid, |
33345d015
|
2966 |
btrfs_ino(inode), |
66d7e7f09
|
2967 2968 |
new_key.offset - datao, 0); |
79787eaab
|
2969 2970 2971 2972 2973 2974 2975 2976 2977 |
if (ret) { btrfs_abort_transaction(trans, root, ret); btrfs_end_transaction(trans, root); goto out; } |
f46b5a66b
|
2978 |
} |
c5c9cd4d1
|
2979 2980 2981 2982 2983 2984 2985 |
} else if (type == BTRFS_FILE_EXTENT_INLINE) { u64 skip = 0; u64 trim = 0; if (off > key.offset) { skip = off - key.offset; new_key.offset += skip; } |
d397712bc
|
2986 |
|
aa42ffd91
|
2987 2988 |
if (key.offset + datal > off + len) trim = key.offset + datal - (off + len); |
d397712bc
|
2989 |
|
c5c9cd4d1
|
2990 |
if (comp && (skip || trim)) { |
c5c9cd4d1
|
2991 |
ret = -EINVAL; |
a22285a6a
|
2992 |
btrfs_end_transaction(trans, root); |
c5c9cd4d1
|
2993 2994 2995 2996 |
goto out; } size -= skip + trim; datal -= skip + trim; |
a22285a6a
|
2997 |
|
5dc562c54
|
2998 |
ret = btrfs_drop_extents(trans, root, inode, |
a22285a6a
|
2999 3000 |
new_key.offset, new_key.offset + datal, |
2671485d3
|
3001 |
1); |
79787eaab
|
3002 |
if (ret) { |
3a29bc092
|
3003 3004 3005 |
if (ret != -EINVAL) btrfs_abort_transaction(trans, root, ret); |
79787eaab
|
3006 3007 3008 |
btrfs_end_transaction(trans, root); goto out; } |
a22285a6a
|
3009 |
|
c5c9cd4d1
|
3010 3011 |
ret = btrfs_insert_empty_item(trans, root, path, &new_key, size); |
79787eaab
|
3012 3013 3014 3015 3016 3017 |
if (ret) { btrfs_abort_transaction(trans, root, ret); btrfs_end_transaction(trans, root); goto out; } |
c5c9cd4d1
|
3018 3019 |
if (skip) { |
d397712bc
|
3020 3021 |
u32 start = btrfs_file_extent_calc_inline_size(0); |
c5c9cd4d1
|
3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 |
memmove(buf+start, buf+start+skip, datal); } leaf = path->nodes[0]; slot = path->slots[0]; write_extent_buffer(leaf, buf, btrfs_item_ptr_offset(leaf, slot), size); inode_add_bytes(inode, datal); |
f46b5a66b
|
3032 |
} |
c5c9cd4d1
|
3033 3034 |
btrfs_mark_buffer_dirty(leaf); |
b3b4aa74b
|
3035 |
btrfs_release_path(path); |
c5c9cd4d1
|
3036 |
|
0c4d2d95d
|
3037 |
inode_inc_iversion(inode); |
a22285a6a
|
3038 |
inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
b5384d48f
|
3039 3040 3041 3042 3043 3044 3045 |
/* * we round up to the block size at eof when * determining which extents to clone above, * but shouldn't round up the file size */ endoff = new_key.offset + datal; |
5f3888ff6
|
3046 3047 |
if (endoff > destoff+olen) endoff = destoff+olen; |
b5384d48f
|
3048 3049 |
if (endoff > inode->i_size) btrfs_i_size_write(inode, endoff); |
a22285a6a
|
3050 |
ret = btrfs_update_inode(trans, root, inode); |
79787eaab
|
3051 3052 3053 3054 3055 3056 |
if (ret) { btrfs_abort_transaction(trans, root, ret); btrfs_end_transaction(trans, root); goto out; } ret = btrfs_end_transaction(trans, root); |
a22285a6a
|
3057 |
} |
b3b4aa74b
|
3058 |
btrfs_release_path(path); |
f46b5a66b
|
3059 |
key.offset++; |
f46b5a66b
|
3060 |
} |
f46b5a66b
|
3061 |
ret = 0; |
32b7c687c
|
3062 |
|
f46b5a66b
|
3063 |
out: |
b3b4aa74b
|
3064 |
btrfs_release_path(path); |
32b7c687c
|
3065 3066 3067 3068 3069 3070 3071 3072 |
btrfs_free_path(path); vfree(buf); return ret; } static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, u64 off, u64 olen, u64 destoff) { |
54563d41a
|
3073 |
struct inode *inode = file_inode(file); |
32b7c687c
|
3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 |
struct btrfs_root *root = BTRFS_I(inode)->root; struct fd src_file; struct inode *src; int ret; u64 len = olen; u64 bs = root->fs_info->sb->s_blocksize; int same_inode = 0; /* * TODO: * - split compressed inline extents. annoying: we need to * decompress into destination's address_space (the file offset * may change, so source mapping won't do), then recompress (or * otherwise reinsert) a subrange. |
00fdf13a2
|
3088 3089 3090 |
* * - split destination inode's inline extents. The inline extents can * be either compressed or non-compressed. |
32b7c687c
|
3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 |
*/ /* the destination must be opened for writing */ if (!(file->f_mode & FMODE_WRITE) || (file->f_flags & O_APPEND)) return -EINVAL; if (btrfs_root_readonly(root)) return -EROFS; ret = mnt_want_write_file(file); if (ret) return ret; src_file = fdget(srcfd); if (!src_file.file) { ret = -EBADF; goto out_drop_write; } ret = -EXDEV; if (src_file.file->f_path.mnt != file->f_path.mnt) goto out_fput; src = file_inode(src_file.file); ret = -EINVAL; if (src == inode) same_inode = 1; /* the src must be open for reading */ if (!(src_file.file->f_mode & FMODE_READ)) goto out_fput; /* don't make the dst file partly checksummed */ if ((BTRFS_I(src)->flags & BTRFS_INODE_NODATASUM) != (BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM)) goto out_fput; ret = -EISDIR; if (S_ISDIR(src->i_mode) || S_ISDIR(inode->i_mode)) goto out_fput; ret = -EXDEV; if (src->i_sb != inode->i_sb) goto out_fput; if (!same_inode) { if (inode < src) { mutex_lock_nested(&inode->i_mutex, I_MUTEX_PARENT); mutex_lock_nested(&src->i_mutex, I_MUTEX_CHILD); } else { mutex_lock_nested(&src->i_mutex, I_MUTEX_PARENT); mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD); } } else { mutex_lock(&src->i_mutex); } /* determine range to clone */ ret = -EINVAL; if (off + len > src->i_size || off + len < off) goto out_unlock; if (len == 0) olen = len = src->i_size - off; /* if we extend to eof, continue to block boundary */ if (off + len == src->i_size) len = ALIGN(src->i_size, bs) - off; /* verify the end result is block aligned */ if (!IS_ALIGNED(off, bs) || !IS_ALIGNED(off + len, bs) || !IS_ALIGNED(destoff, bs)) goto out_unlock; /* verify if ranges are overlapped within the same file */ if (same_inode) { if (destoff + len > off && destoff < off + len) goto out_unlock; } if (destoff > inode->i_size) { ret = btrfs_cont_expand(inode, inode->i_size, destoff); if (ret) goto out_unlock; } /* truncate page cache pages from target inode range */ truncate_inode_pages_range(&inode->i_data, destoff, PAGE_CACHE_ALIGN(destoff + len) - 1); lock_extent_range(src, off, len); ret = btrfs_clone(src, inode, off, olen, len, destoff); |
aa42ffd91
|
3183 |
unlock_extent(&BTRFS_I(src)->io_tree, off, off + len - 1); |
f46b5a66b
|
3184 |
out_unlock: |
c57c2b3ed
|
3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 |
if (!same_inode) { if (inode < src) { mutex_unlock(&src->i_mutex); mutex_unlock(&inode->i_mutex); } else { mutex_unlock(&inode->i_mutex); mutex_unlock(&src->i_mutex); } } else { mutex_unlock(&src->i_mutex); } |
f46b5a66b
|
3196 |
out_fput: |
2903ff019
|
3197 |
fdput(src_file); |
ab67b7c1f
|
3198 |
out_drop_write: |
2a79f17e4
|
3199 |
mnt_drop_write_file(file); |
f46b5a66b
|
3200 3201 |
return ret; } |
7a865e8ac
|
3202 |
static long btrfs_ioctl_clone_range(struct file *file, void __user *argp) |
c5c9cd4d1
|
3203 3204 |
{ struct btrfs_ioctl_clone_range_args args; |
7a865e8ac
|
3205 |
if (copy_from_user(&args, argp, sizeof(args))) |
c5c9cd4d1
|
3206 3207 3208 3209 |
return -EFAULT; return btrfs_ioctl_clone(file, args.src_fd, args.src_offset, args.src_length, args.dest_offset); } |
f46b5a66b
|
3210 3211 3212 3213 3214 3215 |
/* * there are many ways the trans_start and trans_end ioctls can lead * to deadlocks. They should only be used by applications that * basically own the machine, and have a very in depth understanding * of all the possible deadlocks and enospc problems. */ |
b2950863c
|
3216 |
static long btrfs_ioctl_trans_start(struct file *file) |
f46b5a66b
|
3217 |
{ |
496ad9aa8
|
3218 |
struct inode *inode = file_inode(file); |
f46b5a66b
|
3219 3220 |
struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_trans_handle *trans; |
1ab86aedb
|
3221 |
int ret; |
f46b5a66b
|
3222 |
|
1ab86aedb
|
3223 |
ret = -EPERM; |
df5b5520b
|
3224 |
if (!capable(CAP_SYS_ADMIN)) |
1ab86aedb
|
3225 |
goto out; |
df5b5520b
|
3226 |
|
1ab86aedb
|
3227 3228 |
ret = -EINPROGRESS; if (file->private_data) |
f46b5a66b
|
3229 |
goto out; |
9ca9ee09c
|
3230 |
|
b83cc9693
|
3231 3232 3233 |
ret = -EROFS; if (btrfs_root_readonly(root)) goto out; |
a561be710
|
3234 |
ret = mnt_want_write_file(file); |
c146afad2
|
3235 3236 |
if (ret) goto out; |
a4abeea41
|
3237 |
atomic_inc(&root->fs_info->open_ioctl_trans); |
9ca9ee09c
|
3238 |
|
1ab86aedb
|
3239 |
ret = -ENOMEM; |
7a7eaa40a
|
3240 |
trans = btrfs_start_ioctl_transaction(root); |
abd30bb0a
|
3241 |
if (IS_ERR(trans)) |
1ab86aedb
|
3242 3243 3244 3245 3246 3247 |
goto out_drop; file->private_data = trans; return 0; out_drop: |
a4abeea41
|
3248 |
atomic_dec(&root->fs_info->open_ioctl_trans); |
2a79f17e4
|
3249 |
mnt_drop_write_file(file); |
f46b5a66b
|
3250 |
out: |
f46b5a66b
|
3251 3252 |
return ret; } |
6ef5ed0d3
|
3253 3254 |
static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp) { |
496ad9aa8
|
3255 |
struct inode *inode = file_inode(file); |
6ef5ed0d3
|
3256 3257 3258 3259 3260 3261 3262 |
struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_root *new_root; struct btrfs_dir_item *di; struct btrfs_trans_handle *trans; struct btrfs_path *path; struct btrfs_key location; struct btrfs_disk_key disk_key; |
6ef5ed0d3
|
3263 3264 |
u64 objectid = 0; u64 dir_id; |
3c04ce010
|
3265 |
int ret; |
6ef5ed0d3
|
3266 3267 3268 |
if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
3c04ce010
|
3269 3270 3271 3272 3273 3274 3275 3276 |
ret = mnt_want_write_file(file); if (ret) return ret; if (copy_from_user(&objectid, argp, sizeof(objectid))) { ret = -EFAULT; goto out; } |
6ef5ed0d3
|
3277 3278 |
if (!objectid) |
1cecf579d
|
3279 |
objectid = BTRFS_FS_TREE_OBJECTID; |
6ef5ed0d3
|
3280 3281 3282 3283 3284 3285 |
location.objectid = objectid; location.type = BTRFS_ROOT_ITEM_KEY; location.offset = (u64)-1; new_root = btrfs_read_fs_root_no_name(root->fs_info, &location); |
3c04ce010
|
3286 3287 3288 3289 |
if (IS_ERR(new_root)) { ret = PTR_ERR(new_root); goto out; } |
6ef5ed0d3
|
3290 |
|
6ef5ed0d3
|
3291 |
path = btrfs_alloc_path(); |
3c04ce010
|
3292 3293 3294 3295 |
if (!path) { ret = -ENOMEM; goto out; } |
6ef5ed0d3
|
3296 3297 3298 |
path->leave_spinning = 1; trans = btrfs_start_transaction(root, 1); |
98d5dc13e
|
3299 |
if (IS_ERR(trans)) { |
6ef5ed0d3
|
3300 |
btrfs_free_path(path); |
3c04ce010
|
3301 3302 |
ret = PTR_ERR(trans); goto out; |
6ef5ed0d3
|
3303 |
} |
6c41761fc
|
3304 |
dir_id = btrfs_super_root_dir(root->fs_info->super_copy); |
6ef5ed0d3
|
3305 3306 |
di = btrfs_lookup_dir_item(trans, root->fs_info->tree_root, path, dir_id, "default", 7, 1); |
cf1e99a4e
|
3307 |
if (IS_ERR_OR_NULL(di)) { |
6ef5ed0d3
|
3308 3309 |
btrfs_free_path(path); btrfs_end_transaction(trans, root); |
efe120a06
|
3310 3311 |
btrfs_err(new_root->fs_info, "Umm, you don't have the default dir" "item, this isn't going to work"); |
3c04ce010
|
3312 3313 |
ret = -ENOENT; goto out; |
6ef5ed0d3
|
3314 3315 3316 3317 3318 3319 |
} btrfs_cpu_key_to_disk(&disk_key, &new_root->root_key); btrfs_set_dir_item_key(path->nodes[0], di, &disk_key); btrfs_mark_buffer_dirty(path->nodes[0]); btrfs_free_path(path); |
2b0ce2c29
|
3320 |
btrfs_set_fs_incompat(root->fs_info, DEFAULT_SUBVOL); |
6ef5ed0d3
|
3321 |
btrfs_end_transaction(trans, root); |
3c04ce010
|
3322 3323 3324 |
out: mnt_drop_write_file(file); return ret; |
6ef5ed0d3
|
3325 |
} |
5af3e8cce
|
3326 3327 |
void btrfs_get_block_group_info(struct list_head *groups_list, struct btrfs_ioctl_space_info *space) |
bf5fc093c
|
3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 |
{ struct btrfs_block_group_cache *block_group; space->total_bytes = 0; space->used_bytes = 0; space->flags = 0; list_for_each_entry(block_group, groups_list, list) { space->flags = block_group->flags; space->total_bytes += block_group->key.offset; space->used_bytes += btrfs_block_group_used(&block_group->item); } } |
48a3b6366
|
3341 |
static long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg) |
1406e4327
|
3342 3343 3344 3345 |
{ struct btrfs_ioctl_space_args space_args; struct btrfs_ioctl_space_info space; struct btrfs_ioctl_space_info *dest; |
7fde62bff
|
3346 |
struct btrfs_ioctl_space_info *dest_orig; |
13f2696f1
|
3347 |
struct btrfs_ioctl_space_info __user *user_dest; |
1406e4327
|
3348 |
struct btrfs_space_info *info; |
bf5fc093c
|
3349 3350 3351 3352 3353 |
u64 types[] = {BTRFS_BLOCK_GROUP_DATA, BTRFS_BLOCK_GROUP_SYSTEM, BTRFS_BLOCK_GROUP_METADATA, BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; int num_types = 4; |
7fde62bff
|
3354 |
int alloc_size; |
1406e4327
|
3355 |
int ret = 0; |
51788b1bd
|
3356 |
u64 slot_count = 0; |
bf5fc093c
|
3357 |
int i, c; |
1406e4327
|
3358 3359 3360 3361 3362 |
if (copy_from_user(&space_args, (struct btrfs_ioctl_space_args __user *)arg, sizeof(space_args))) return -EFAULT; |
bf5fc093c
|
3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 |
for (i = 0; i < num_types; i++) { struct btrfs_space_info *tmp; info = NULL; rcu_read_lock(); list_for_each_entry_rcu(tmp, &root->fs_info->space_info, list) { if (tmp->flags == types[i]) { info = tmp; break; } } rcu_read_unlock(); if (!info) continue; down_read(&info->groups_sem); for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { if (!list_empty(&info->block_groups[c])) slot_count++; } up_read(&info->groups_sem); } |
7fde62bff
|
3387 |
|
36523e951
|
3388 3389 3390 3391 |
/* * Global block reserve, exported as a space_info */ slot_count++; |
7fde62bff
|
3392 3393 3394 3395 3396 |
/* space_slots == 0 means they are asking for a count */ if (space_args.space_slots == 0) { space_args.total_spaces = slot_count; goto out; } |
bf5fc093c
|
3397 |
|
51788b1bd
|
3398 |
slot_count = min_t(u64, space_args.space_slots, slot_count); |
bf5fc093c
|
3399 |
|
7fde62bff
|
3400 |
alloc_size = sizeof(*dest) * slot_count; |
bf5fc093c
|
3401 |
|
7fde62bff
|
3402 3403 3404 3405 3406 |
/* we generally have at most 6 or so space infos, one for each raid * level. So, a whole page should be more than enough for everyone */ if (alloc_size > PAGE_CACHE_SIZE) return -ENOMEM; |
1406e4327
|
3407 |
space_args.total_spaces = 0; |
7fde62bff
|
3408 3409 3410 3411 |
dest = kmalloc(alloc_size, GFP_NOFS); if (!dest) return -ENOMEM; dest_orig = dest; |
1406e4327
|
3412 |
|
7fde62bff
|
3413 |
/* now we have a buffer to copy into */ |
bf5fc093c
|
3414 3415 |
for (i = 0; i < num_types; i++) { struct btrfs_space_info *tmp; |
51788b1bd
|
3416 3417 |
if (!slot_count) break; |
bf5fc093c
|
3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 |
info = NULL; rcu_read_lock(); list_for_each_entry_rcu(tmp, &root->fs_info->space_info, list) { if (tmp->flags == types[i]) { info = tmp; break; } } rcu_read_unlock(); |
7fde62bff
|
3428 |
|
bf5fc093c
|
3429 3430 3431 3432 3433 |
if (!info) continue; down_read(&info->groups_sem); for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { if (!list_empty(&info->block_groups[c])) { |
5af3e8cce
|
3434 3435 |
btrfs_get_block_group_info( &info->block_groups[c], &space); |
bf5fc093c
|
3436 3437 3438 |
memcpy(dest, &space, sizeof(space)); dest++; space_args.total_spaces++; |
51788b1bd
|
3439 |
slot_count--; |
bf5fc093c
|
3440 |
} |
51788b1bd
|
3441 3442 |
if (!slot_count) break; |
bf5fc093c
|
3443 3444 |
} up_read(&info->groups_sem); |
1406e4327
|
3445 |
} |
1406e4327
|
3446 |
|
36523e951
|
3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 |
/* * Add global block reserve */ if (slot_count) { struct btrfs_block_rsv *block_rsv = &root->fs_info->global_block_rsv; spin_lock(&block_rsv->lock); space.total_bytes = block_rsv->size; space.used_bytes = block_rsv->size - block_rsv->reserved; spin_unlock(&block_rsv->lock); space.flags = BTRFS_SPACE_INFO_GLOBAL_RSV; memcpy(dest, &space, sizeof(space)); space_args.total_spaces++; } |
2eec6c810
|
3461 |
user_dest = (struct btrfs_ioctl_space_info __user *) |
7fde62bff
|
3462 3463 3464 3465 3466 3467 3468 3469 |
(arg + sizeof(struct btrfs_ioctl_space_args)); if (copy_to_user(user_dest, dest_orig, alloc_size)) ret = -EFAULT; kfree(dest_orig); out: if (ret == 0 && copy_to_user(arg, &space_args, sizeof(space_args))) |
1406e4327
|
3470 3471 3472 3473 |
ret = -EFAULT; return ret; } |
f46b5a66b
|
3474 3475 3476 3477 3478 3479 3480 3481 |
/* * there are many ways the trans_start and trans_end ioctls can lead * to deadlocks. They should only be used by applications that * basically own the machine, and have a very in depth understanding * of all the possible deadlocks and enospc problems. */ long btrfs_ioctl_trans_end(struct file *file) { |
496ad9aa8
|
3482 |
struct inode *inode = file_inode(file); |
f46b5a66b
|
3483 3484 |
struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_trans_handle *trans; |
f46b5a66b
|
3485 |
|
f46b5a66b
|
3486 |
trans = file->private_data; |
1ab86aedb
|
3487 3488 |
if (!trans) return -EINVAL; |
b214107ed
|
3489 |
file->private_data = NULL; |
9ca9ee09c
|
3490 |
|
1ab86aedb
|
3491 |
btrfs_end_transaction(trans, root); |
a4abeea41
|
3492 |
atomic_dec(&root->fs_info->open_ioctl_trans); |
9ca9ee09c
|
3493 |
|
2a79f17e4
|
3494 |
mnt_drop_write_file(file); |
1ab86aedb
|
3495 |
return 0; |
f46b5a66b
|
3496 |
} |
9a8c28bec
|
3497 3498 |
static noinline long btrfs_ioctl_start_sync(struct btrfs_root *root, void __user *argp) |
462045928
|
3499 |
{ |
462045928
|
3500 3501 |
struct btrfs_trans_handle *trans; u64 transid; |
db5b493ac
|
3502 |
int ret; |
462045928
|
3503 |
|
d4edf39bd
|
3504 |
trans = btrfs_attach_transaction_barrier(root); |
ff7c1d335
|
3505 3506 3507 3508 3509 3510 3511 3512 |
if (IS_ERR(trans)) { if (PTR_ERR(trans) != -ENOENT) return PTR_ERR(trans); /* No running transaction, don't bother */ transid = root->fs_info->last_trans_committed; goto out; } |
462045928
|
3513 |
transid = trans->transid; |
db5b493ac
|
3514 |
ret = btrfs_commit_transaction_async(trans, root, 0); |
8b2b2d3cb
|
3515 3516 |
if (ret) { btrfs_end_transaction(trans, root); |
db5b493ac
|
3517 |
return ret; |
8b2b2d3cb
|
3518 |
} |
ff7c1d335
|
3519 |
out: |
462045928
|
3520 3521 3522 3523 3524 |
if (argp) if (copy_to_user(argp, &transid, sizeof(transid))) return -EFAULT; return 0; } |
9a8c28bec
|
3525 3526 |
static noinline long btrfs_ioctl_wait_sync(struct btrfs_root *root, void __user *argp) |
462045928
|
3527 |
{ |
462045928
|
3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 |
u64 transid; if (argp) { if (copy_from_user(&transid, argp, sizeof(transid))) return -EFAULT; } else { transid = 0; /* current trans */ } return btrfs_wait_for_commit(root, transid); } |
b8e95489b
|
3538 |
static long btrfs_ioctl_scrub(struct file *file, void __user *arg) |
475f63874
|
3539 |
{ |
496ad9aa8
|
3540 |
struct btrfs_root *root = BTRFS_I(file_inode(file))->root; |
475f63874
|
3541 |
struct btrfs_ioctl_scrub_args *sa; |
b8e95489b
|
3542 |
int ret; |
475f63874
|
3543 3544 3545 3546 3547 3548 3549 |
if (!capable(CAP_SYS_ADMIN)) return -EPERM; sa = memdup_user(arg, sizeof(*sa)); if (IS_ERR(sa)) return PTR_ERR(sa); |
b8e95489b
|
3550 3551 3552 3553 3554 |
if (!(sa->flags & BTRFS_SCRUB_READONLY)) { ret = mnt_want_write_file(file); if (ret) goto out; } |
aa1b8cd40
|
3555 |
ret = btrfs_scrub_dev(root->fs_info, sa->devid, sa->start, sa->end, |
63a212abc
|
3556 3557 |
&sa->progress, sa->flags & BTRFS_SCRUB_READONLY, 0); |
475f63874
|
3558 3559 3560 |
if (copy_to_user(arg, sa, sizeof(*sa))) ret = -EFAULT; |
b8e95489b
|
3561 3562 3563 |
if (!(sa->flags & BTRFS_SCRUB_READONLY)) mnt_drop_write_file(file); out: |
475f63874
|
3564 3565 3566 3567 3568 3569 3570 3571 |
kfree(sa); return ret; } static long btrfs_ioctl_scrub_cancel(struct btrfs_root *root, void __user *arg) { if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
aa1b8cd40
|
3572 |
return btrfs_scrub_cancel(root->fs_info); |
475f63874
|
3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 |
} static long btrfs_ioctl_scrub_progress(struct btrfs_root *root, void __user *arg) { struct btrfs_ioctl_scrub_args *sa; int ret; if (!capable(CAP_SYS_ADMIN)) return -EPERM; sa = memdup_user(arg, sizeof(*sa)); if (IS_ERR(sa)) return PTR_ERR(sa); ret = btrfs_scrub_progress(root, sa->devid, &sa->progress); if (copy_to_user(arg, sa, sizeof(*sa))) ret = -EFAULT; kfree(sa); return ret; } |
c11d2c236
|
3596 |
static long btrfs_ioctl_get_dev_stats(struct btrfs_root *root, |
b27f7c0c1
|
3597 |
void __user *arg) |
c11d2c236
|
3598 3599 3600 |
{ struct btrfs_ioctl_get_dev_stats *sa; int ret; |
c11d2c236
|
3601 3602 3603 |
sa = memdup_user(arg, sizeof(*sa)); if (IS_ERR(sa)) return PTR_ERR(sa); |
b27f7c0c1
|
3604 3605 3606 3607 3608 3609 |
if ((sa->flags & BTRFS_DEV_STATS_RESET) && !capable(CAP_SYS_ADMIN)) { kfree(sa); return -EPERM; } ret = btrfs_get_dev_stats(root, sa); |
c11d2c236
|
3610 3611 3612 3613 3614 3615 3616 |
if (copy_to_user(arg, sa, sizeof(*sa))) ret = -EFAULT; kfree(sa); return ret; } |
3f6bcfbd4
|
3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 |
static long btrfs_ioctl_dev_replace(struct btrfs_root *root, void __user *arg) { struct btrfs_ioctl_dev_replace_args *p; int ret; if (!capable(CAP_SYS_ADMIN)) return -EPERM; p = memdup_user(arg, sizeof(*p)); if (IS_ERR(p)) return PTR_ERR(p); switch (p->cmd) { case BTRFS_IOCTL_DEV_REPLACE_CMD_START: |
adfa97cbd
|
3631 3632 3633 3634 |
if (root->fs_info->sb->s_flags & MS_RDONLY) { ret = -EROFS; goto out; } |
3f6bcfbd4
|
3635 3636 3637 |
if (atomic_xchg( &root->fs_info->mutually_exclusive_operation_running, 1)) { |
e57138b3e
|
3638 |
ret = BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS; |
3f6bcfbd4
|
3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 |
} else { ret = btrfs_dev_replace_start(root, p); atomic_set( &root->fs_info->mutually_exclusive_operation_running, 0); } break; case BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS: btrfs_dev_replace_status(root->fs_info, p); ret = 0; break; case BTRFS_IOCTL_DEV_REPLACE_CMD_CANCEL: ret = btrfs_dev_replace_cancel(root->fs_info, p); break; default: ret = -EINVAL; break; } if (copy_to_user(arg, p, sizeof(*p))) ret = -EFAULT; |
adfa97cbd
|
3660 |
out: |
3f6bcfbd4
|
3661 3662 3663 |
kfree(p); return ret; } |
d7728c960
|
3664 3665 3666 3667 |
static long btrfs_ioctl_ino_to_path(struct btrfs_root *root, void __user *arg) { int ret = 0; int i; |
740c3d226
|
3668 |
u64 rel_ptr; |
d7728c960
|
3669 |
int size; |
806468f8b
|
3670 |
struct btrfs_ioctl_ino_path_args *ipa = NULL; |
d7728c960
|
3671 3672 |
struct inode_fs_paths *ipath = NULL; struct btrfs_path *path; |
82b22ac8f
|
3673 |
if (!capable(CAP_DAC_READ_SEARCH)) |
d7728c960
|
3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 |
return -EPERM; path = btrfs_alloc_path(); if (!path) { ret = -ENOMEM; goto out; } ipa = memdup_user(arg, sizeof(*ipa)); if (IS_ERR(ipa)) { ret = PTR_ERR(ipa); ipa = NULL; goto out; } size = min_t(u32, ipa->size, 4096); ipath = init_ipath(size, root, path); if (IS_ERR(ipath)) { ret = PTR_ERR(ipath); ipath = NULL; goto out; } ret = paths_from_inode(ipa->inum, ipath); if (ret < 0) goto out; for (i = 0; i < ipath->fspath->elem_cnt; ++i) { |
745c4d8e1
|
3702 3703 |
rel_ptr = ipath->fspath->val[i] - (u64)(unsigned long)ipath->fspath->val; |
740c3d226
|
3704 |
ipath->fspath->val[i] = rel_ptr; |
d7728c960
|
3705 |
} |
745c4d8e1
|
3706 3707 |
ret = copy_to_user((void *)(unsigned long)ipa->fspath, (void *)(unsigned long)ipath->fspath, size); |
d7728c960
|
3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 |
if (ret) { ret = -EFAULT; goto out; } out: btrfs_free_path(path); free_ipath(ipath); kfree(ipa); return ret; } static int build_ino_list(u64 inum, u64 offset, u64 root, void *ctx) { struct btrfs_data_container *inodes = ctx; const size_t c = 3 * sizeof(u64); if (inodes->bytes_left >= c) { inodes->bytes_left -= c; inodes->val[inodes->elem_cnt] = inum; inodes->val[inodes->elem_cnt + 1] = offset; inodes->val[inodes->elem_cnt + 2] = root; inodes->elem_cnt += 3; } else { inodes->bytes_missing += c - inodes->bytes_left; inodes->bytes_left = 0; inodes->elem_missed += 3; } return 0; } static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root, void __user *arg) { int ret = 0; int size; |
d7728c960
|
3746 3747 3748 |
struct btrfs_ioctl_logical_ino_args *loi; struct btrfs_data_container *inodes = NULL; struct btrfs_path *path = NULL; |
d7728c960
|
3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 |
if (!capable(CAP_SYS_ADMIN)) return -EPERM; loi = memdup_user(arg, sizeof(*loi)); if (IS_ERR(loi)) { ret = PTR_ERR(loi); loi = NULL; goto out; } path = btrfs_alloc_path(); if (!path) { ret = -ENOMEM; goto out; } |
425d17a29
|
3765 |
size = min_t(u32, loi->size, 64 * 1024); |
d7728c960
|
3766 3767 3768 3769 3770 3771 |
inodes = init_data_container(size); if (IS_ERR(inodes)) { ret = PTR_ERR(inodes); inodes = NULL; goto out; } |
df031f075
|
3772 3773 3774 |
ret = iterate_inodes_from_logical(loi->logical, root->fs_info, path, build_ino_list, inodes); if (ret == -EINVAL) |
d7728c960
|
3775 3776 3777 |
ret = -ENOENT; if (ret < 0) goto out; |
745c4d8e1
|
3778 3779 |
ret = copy_to_user((void *)(unsigned long)loi->inodes, (void *)(unsigned long)inodes, size); |
d7728c960
|
3780 3781 3782 3783 3784 |
if (ret) ret = -EFAULT; out: btrfs_free_path(path); |
425d17a29
|
3785 |
vfree(inodes); |
d7728c960
|
3786 3787 3788 3789 |
kfree(loi); return ret; } |
19a39dce3
|
3790 |
void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock, |
c9e9f97bd
|
3791 3792 3793 3794 3795 |
struct btrfs_ioctl_balance_args *bargs) { struct btrfs_balance_control *bctl = fs_info->balance_ctl; bargs->flags = bctl->flags; |
837d5b6e4
|
3796 3797 3798 3799 |
if (atomic_read(&fs_info->balance_running)) bargs->state |= BTRFS_BALANCE_STATE_RUNNING; if (atomic_read(&fs_info->balance_pause_req)) bargs->state |= BTRFS_BALANCE_STATE_PAUSE_REQ; |
a7e99c691
|
3800 3801 |
if (atomic_read(&fs_info->balance_cancel_req)) bargs->state |= BTRFS_BALANCE_STATE_CANCEL_REQ; |
837d5b6e4
|
3802 |
|
c9e9f97bd
|
3803 3804 3805 |
memcpy(&bargs->data, &bctl->data, sizeof(bargs->data)); memcpy(&bargs->meta, &bctl->meta, sizeof(bargs->meta)); memcpy(&bargs->sys, &bctl->sys, sizeof(bargs->sys)); |
19a39dce3
|
3806 3807 3808 3809 3810 3811 3812 3813 |
if (lock) { spin_lock(&fs_info->balance_lock); memcpy(&bargs->stat, &bctl->stat, sizeof(bargs->stat)); spin_unlock(&fs_info->balance_lock); } else { memcpy(&bargs->stat, &bctl->stat, sizeof(bargs->stat)); } |
c9e9f97bd
|
3814 |
} |
9ba1f6e44
|
3815 |
static long btrfs_ioctl_balance(struct file *file, void __user *arg) |
c9e9f97bd
|
3816 |
{ |
496ad9aa8
|
3817 |
struct btrfs_root *root = BTRFS_I(file_inode(file))->root; |
c9e9f97bd
|
3818 3819 3820 |
struct btrfs_fs_info *fs_info = root->fs_info; struct btrfs_ioctl_balance_args *bargs; struct btrfs_balance_control *bctl; |
ed0fb78fb
|
3821 |
bool need_unlock; /* for mut. excl. ops lock */ |
c9e9f97bd
|
3822 3823 3824 3825 |
int ret; if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
e54bfa310
|
3826 |
ret = mnt_want_write_file(file); |
9ba1f6e44
|
3827 3828 |
if (ret) return ret; |
ed0fb78fb
|
3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 |
again: if (!atomic_xchg(&fs_info->mutually_exclusive_operation_running, 1)) { mutex_lock(&fs_info->volume_mutex); mutex_lock(&fs_info->balance_mutex); need_unlock = true; goto locked; } /* * mut. excl. ops lock is locked. Three possibilites: * (1) some other op is running * (2) balance is running * (3) balance is paused -- special case (think resume) */ |
c9e9f97bd
|
3843 |
mutex_lock(&fs_info->balance_mutex); |
ed0fb78fb
|
3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 |
if (fs_info->balance_ctl) { /* this is either (2) or (3) */ if (!atomic_read(&fs_info->balance_running)) { mutex_unlock(&fs_info->balance_mutex); if (!mutex_trylock(&fs_info->volume_mutex)) goto again; mutex_lock(&fs_info->balance_mutex); if (fs_info->balance_ctl && !atomic_read(&fs_info->balance_running)) { /* this is (3) */ need_unlock = false; goto locked; } mutex_unlock(&fs_info->balance_mutex); mutex_unlock(&fs_info->volume_mutex); goto again; } else { /* this is (2) */ mutex_unlock(&fs_info->balance_mutex); ret = -EINPROGRESS; goto out; } } else { /* this is (1) */ mutex_unlock(&fs_info->balance_mutex); |
e57138b3e
|
3871 |
ret = BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS; |
ed0fb78fb
|
3872 3873 3874 3875 3876 |
goto out; } locked: BUG_ON(!atomic_read(&fs_info->mutually_exclusive_operation_running)); |
c9e9f97bd
|
3877 3878 3879 3880 3881 |
if (arg) { bargs = memdup_user(arg, sizeof(*bargs)); if (IS_ERR(bargs)) { ret = PTR_ERR(bargs); |
ed0fb78fb
|
3882 |
goto out_unlock; |
c9e9f97bd
|
3883 |
} |
de322263d
|
3884 3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 |
if (bargs->flags & BTRFS_BALANCE_RESUME) { if (!fs_info->balance_ctl) { ret = -ENOTCONN; goto out_bargs; } bctl = fs_info->balance_ctl; spin_lock(&fs_info->balance_lock); bctl->flags |= BTRFS_BALANCE_RESUME; spin_unlock(&fs_info->balance_lock); goto do_balance; } |
c9e9f97bd
|
3898 3899 3900 |
} else { bargs = NULL; } |
ed0fb78fb
|
3901 |
if (fs_info->balance_ctl) { |
837d5b6e4
|
3902 3903 3904 |
ret = -EINPROGRESS; goto out_bargs; } |
c9e9f97bd
|
3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 |
bctl = kzalloc(sizeof(*bctl), GFP_NOFS); if (!bctl) { ret = -ENOMEM; goto out_bargs; } bctl->fs_info = fs_info; if (arg) { memcpy(&bctl->data, &bargs->data, sizeof(bctl->data)); memcpy(&bctl->meta, &bargs->meta, sizeof(bctl->meta)); memcpy(&bctl->sys, &bargs->sys, sizeof(bctl->sys)); bctl->flags = bargs->flags; |
f43ffb60f
|
3918 3919 3920 |
} else { /* balance everything - no filters */ bctl->flags |= BTRFS_BALANCE_TYPE_MASK; |
c9e9f97bd
|
3921 |
} |
de322263d
|
3922 |
do_balance: |
c9e9f97bd
|
3923 |
/* |
ed0fb78fb
|
3924 3925 3926 3927 3928 |
* Ownership of bctl and mutually_exclusive_operation_running * goes to to btrfs_balance. bctl is freed in __cancel_balance, * or, if restriper was paused all the way until unmount, in * free_fs_info. mutually_exclusive_operation_running is * cleared in __cancel_balance. |
c9e9f97bd
|
3929 |
*/ |
ed0fb78fb
|
3930 3931 3932 |
need_unlock = false; ret = btrfs_balance(bctl, bargs); |
c9e9f97bd
|
3933 3934 3935 3936 3937 3938 3939 |
if (arg) { if (copy_to_user(arg, bargs, sizeof(*bargs))) ret = -EFAULT; } out_bargs: kfree(bargs); |
ed0fb78fb
|
3940 |
out_unlock: |
c9e9f97bd
|
3941 3942 |
mutex_unlock(&fs_info->balance_mutex); mutex_unlock(&fs_info->volume_mutex); |
ed0fb78fb
|
3943 3944 3945 |
if (need_unlock) atomic_set(&fs_info->mutually_exclusive_operation_running, 0); out: |
e54bfa310
|
3946 |
mnt_drop_write_file(file); |
c9e9f97bd
|
3947 3948 |
return ret; } |
837d5b6e4
|
3949 3950 3951 3952 3953 3954 3955 3956 |
static long btrfs_ioctl_balance_ctl(struct btrfs_root *root, int cmd) { if (!capable(CAP_SYS_ADMIN)) return -EPERM; switch (cmd) { case BTRFS_BALANCE_CTL_PAUSE: return btrfs_pause_balance(root->fs_info); |
a7e99c691
|
3957 3958 |
case BTRFS_BALANCE_CTL_CANCEL: return btrfs_cancel_balance(root->fs_info); |
837d5b6e4
|
3959 3960 3961 3962 |
} return -EINVAL; } |
19a39dce3
|
3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 |
static long btrfs_ioctl_balance_progress(struct btrfs_root *root, void __user *arg) { struct btrfs_fs_info *fs_info = root->fs_info; struct btrfs_ioctl_balance_args *bargs; int ret = 0; if (!capable(CAP_SYS_ADMIN)) return -EPERM; mutex_lock(&fs_info->balance_mutex); if (!fs_info->balance_ctl) { ret = -ENOTCONN; goto out; } bargs = kzalloc(sizeof(*bargs), GFP_NOFS); if (!bargs) { ret = -ENOMEM; goto out; } update_ioctl_balance_args(fs_info, 1, bargs); if (copy_to_user(arg, bargs, sizeof(*bargs))) ret = -EFAULT; kfree(bargs); out: mutex_unlock(&fs_info->balance_mutex); return ret; } |
905b0dda0
|
3995 |
static long btrfs_ioctl_quota_ctl(struct file *file, void __user *arg) |
5d13a37bd
|
3996 |
{ |
496ad9aa8
|
3997 |
struct btrfs_root *root = BTRFS_I(file_inode(file))->root; |
5d13a37bd
|
3998 3999 4000 4001 4002 4003 4004 |
struct btrfs_ioctl_quota_ctl_args *sa; struct btrfs_trans_handle *trans = NULL; int ret; int err; if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
905b0dda0
|
4005 4006 4007 |
ret = mnt_want_write_file(file); if (ret) return ret; |
5d13a37bd
|
4008 4009 |
sa = memdup_user(arg, sizeof(*sa)); |
905b0dda0
|
4010 4011 4012 4013 |
if (IS_ERR(sa)) { ret = PTR_ERR(sa); goto drop_write; } |
5d13a37bd
|
4014 |
|
7708f029d
|
4015 |
down_write(&root->fs_info->subvol_sem); |
2f2320360
|
4016 4017 4018 4019 |
trans = btrfs_start_transaction(root->fs_info->tree_root, 2); if (IS_ERR(trans)) { ret = PTR_ERR(trans); goto out; |
5d13a37bd
|
4020 4021 4022 4023 4024 4025 4026 4027 4028 |
} switch (sa->cmd) { case BTRFS_QUOTA_CTL_ENABLE: ret = btrfs_quota_enable(trans, root->fs_info); break; case BTRFS_QUOTA_CTL_DISABLE: ret = btrfs_quota_disable(trans, root->fs_info); break; |
5d13a37bd
|
4029 4030 4031 4032 |
default: ret = -EINVAL; break; } |
2f2320360
|
4033 4034 4035 |
err = btrfs_commit_transaction(trans, root->fs_info->tree_root); if (err && !ret) ret = err; |
5d13a37bd
|
4036 4037 |
out: kfree(sa); |
7708f029d
|
4038 |
up_write(&root->fs_info->subvol_sem); |
905b0dda0
|
4039 4040 |
drop_write: mnt_drop_write_file(file); |
5d13a37bd
|
4041 4042 |
return ret; } |
905b0dda0
|
4043 |
static long btrfs_ioctl_qgroup_assign(struct file *file, void __user *arg) |
5d13a37bd
|
4044 |
{ |
496ad9aa8
|
4045 |
struct btrfs_root *root = BTRFS_I(file_inode(file))->root; |
5d13a37bd
|
4046 4047 4048 4049 4050 4051 4052 |
struct btrfs_ioctl_qgroup_assign_args *sa; struct btrfs_trans_handle *trans; int ret; int err; if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
905b0dda0
|
4053 4054 4055 |
ret = mnt_want_write_file(file); if (ret) return ret; |
5d13a37bd
|
4056 4057 |
sa = memdup_user(arg, sizeof(*sa)); |
905b0dda0
|
4058 4059 4060 4061 |
if (IS_ERR(sa)) { ret = PTR_ERR(sa); goto drop_write; } |
5d13a37bd
|
4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 |
trans = btrfs_join_transaction(root); if (IS_ERR(trans)) { ret = PTR_ERR(trans); goto out; } /* FIXME: check if the IDs really exist */ if (sa->assign) { ret = btrfs_add_qgroup_relation(trans, root->fs_info, sa->src, sa->dst); } else { ret = btrfs_del_qgroup_relation(trans, root->fs_info, sa->src, sa->dst); } err = btrfs_end_transaction(trans, root); if (err && !ret) ret = err; out: kfree(sa); |
905b0dda0
|
4084 4085 |
drop_write: mnt_drop_write_file(file); |
5d13a37bd
|
4086 4087 |
return ret; } |
905b0dda0
|
4088 |
static long btrfs_ioctl_qgroup_create(struct file *file, void __user *arg) |
5d13a37bd
|
4089 |
{ |
496ad9aa8
|
4090 |
struct btrfs_root *root = BTRFS_I(file_inode(file))->root; |
5d13a37bd
|
4091 4092 4093 4094 4095 4096 4097 |
struct btrfs_ioctl_qgroup_create_args *sa; struct btrfs_trans_handle *trans; int ret; int err; if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
905b0dda0
|
4098 4099 4100 |
ret = mnt_want_write_file(file); if (ret) return ret; |
5d13a37bd
|
4101 4102 |
sa = memdup_user(arg, sizeof(*sa)); |
905b0dda0
|
4103 4104 4105 4106 |
if (IS_ERR(sa)) { ret = PTR_ERR(sa); goto drop_write; } |
5d13a37bd
|
4107 |
|
d86e56cf7
|
4108 4109 4110 4111 |
if (!sa->qgroupid) { ret = -EINVAL; goto out; } |
5d13a37bd
|
4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 |
trans = btrfs_join_transaction(root); if (IS_ERR(trans)) { ret = PTR_ERR(trans); goto out; } /* FIXME: check if the IDs really exist */ if (sa->create) { ret = btrfs_create_qgroup(trans, root->fs_info, sa->qgroupid, NULL); } else { ret = btrfs_remove_qgroup(trans, root->fs_info, sa->qgroupid); } err = btrfs_end_transaction(trans, root); if (err && !ret) ret = err; out: kfree(sa); |
905b0dda0
|
4132 4133 |
drop_write: mnt_drop_write_file(file); |
5d13a37bd
|
4134 4135 |
return ret; } |
905b0dda0
|
4136 |
static long btrfs_ioctl_qgroup_limit(struct file *file, void __user *arg) |
5d13a37bd
|
4137 |
{ |
496ad9aa8
|
4138 |
struct btrfs_root *root = BTRFS_I(file_inode(file))->root; |
5d13a37bd
|
4139 4140 4141 4142 4143 4144 4145 4146 |
struct btrfs_ioctl_qgroup_limit_args *sa; struct btrfs_trans_handle *trans; int ret; int err; u64 qgroupid; if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
905b0dda0
|
4147 4148 4149 |
ret = mnt_want_write_file(file); if (ret) return ret; |
5d13a37bd
|
4150 4151 |
sa = memdup_user(arg, sizeof(*sa)); |
905b0dda0
|
4152 4153 4154 4155 |
if (IS_ERR(sa)) { ret = PTR_ERR(sa); goto drop_write; } |
5d13a37bd
|
4156 4157 4158 4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 |
trans = btrfs_join_transaction(root); if (IS_ERR(trans)) { ret = PTR_ERR(trans); goto out; } qgroupid = sa->qgroupid; if (!qgroupid) { /* take the current subvol as qgroup */ qgroupid = root->root_key.objectid; } /* FIXME: check if the IDs really exist */ ret = btrfs_limit_qgroup(trans, root->fs_info, qgroupid, &sa->lim); err = btrfs_end_transaction(trans, root); if (err && !ret) ret = err; out: kfree(sa); |
905b0dda0
|
4178 4179 |
drop_write: mnt_drop_write_file(file); |
5d13a37bd
|
4180 4181 |
return ret; } |
2f2320360
|
4182 4183 |
static long btrfs_ioctl_quota_rescan(struct file *file, void __user *arg) { |
6d0379ec4
|
4184 |
struct btrfs_root *root = BTRFS_I(file_inode(file))->root; |
2f2320360
|
4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 |
struct btrfs_ioctl_quota_rescan_args *qsa; int ret; if (!capable(CAP_SYS_ADMIN)) return -EPERM; ret = mnt_want_write_file(file); if (ret) return ret; qsa = memdup_user(arg, sizeof(*qsa)); if (IS_ERR(qsa)) { ret = PTR_ERR(qsa); goto drop_write; } if (qsa->flags) { ret = -EINVAL; goto out; } ret = btrfs_qgroup_rescan(root->fs_info); out: kfree(qsa); drop_write: mnt_drop_write_file(file); return ret; } static long btrfs_ioctl_quota_rescan_status(struct file *file, void __user *arg) { |
6d0379ec4
|
4217 |
struct btrfs_root *root = BTRFS_I(file_inode(file))->root; |
2f2320360
|
4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 |
struct btrfs_ioctl_quota_rescan_args *qsa; int ret = 0; if (!capable(CAP_SYS_ADMIN)) return -EPERM; qsa = kzalloc(sizeof(*qsa), GFP_NOFS); if (!qsa) return -ENOMEM; if (root->fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) { qsa->flags = 1; qsa->progress = root->fs_info->qgroup_rescan_progress.objectid; } if (copy_to_user(arg, qsa, sizeof(*qsa))) ret = -EFAULT; kfree(qsa); return ret; } |
57254b6eb
|
4239 4240 |
static long btrfs_ioctl_quota_rescan_wait(struct file *file, void __user *arg) { |
54563d41a
|
4241 |
struct btrfs_root *root = BTRFS_I(file_inode(file))->root; |
57254b6eb
|
4242 4243 4244 4245 4246 4247 |
if (!capable(CAP_SYS_ADMIN)) return -EPERM; return btrfs_qgroup_wait_for_completion(root->fs_info); } |
abccd00f8
|
4248 4249 |
static long _btrfs_ioctl_set_received_subvol(struct file *file, struct btrfs_ioctl_received_subvol_args *sa) |
8ea05e3a4
|
4250 |
{ |
496ad9aa8
|
4251 |
struct inode *inode = file_inode(file); |
8ea05e3a4
|
4252 4253 4254 4255 4256 |
struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_root_item *root_item = &root->root_item; struct btrfs_trans_handle *trans; struct timespec ct = CURRENT_TIME; int ret = 0; |
dd5f9615f
|
4257 |
int received_uuid_changed; |
8ea05e3a4
|
4258 |
|
bd60ea0fe
|
4259 4260 |
if (!inode_owner_or_capable(inode)) return -EPERM; |
8ea05e3a4
|
4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 |
ret = mnt_want_write_file(file); if (ret < 0) return ret; down_write(&root->fs_info->subvol_sem); if (btrfs_ino(inode) != BTRFS_FIRST_FREE_OBJECTID) { ret = -EINVAL; goto out; } if (btrfs_root_readonly(root)) { ret = -EROFS; goto out; } |
dd5f9615f
|
4276 4277 4278 4279 4280 |
/* * 1 - root item * 2 - uuid items (received uuid + subvol uuid) */ trans = btrfs_start_transaction(root, 3); |
8ea05e3a4
|
4281 4282 4283 4284 4285 4286 4287 4288 4289 |
if (IS_ERR(trans)) { ret = PTR_ERR(trans); trans = NULL; goto out; } sa->rtransid = trans->transid; sa->rtime.sec = ct.tv_sec; sa->rtime.nsec = ct.tv_nsec; |
dd5f9615f
|
4290 4291 4292 4293 4294 4295 4296 4297 |
received_uuid_changed = memcmp(root_item->received_uuid, sa->uuid, BTRFS_UUID_SIZE); if (received_uuid_changed && !btrfs_is_empty_uuid(root_item->received_uuid)) btrfs_uuid_tree_rem(trans, root->fs_info->uuid_root, root_item->received_uuid, BTRFS_UUID_KEY_RECEIVED_SUBVOL, root->root_key.objectid); |
8ea05e3a4
|
4298 4299 4300 |
memcpy(root_item->received_uuid, sa->uuid, BTRFS_UUID_SIZE); btrfs_set_root_stransid(root_item, sa->stransid); btrfs_set_root_rtransid(root_item, sa->rtransid); |
3cae210fa
|
4301 4302 4303 4304 |
btrfs_set_stack_timespec_sec(&root_item->stime, sa->stime.sec); btrfs_set_stack_timespec_nsec(&root_item->stime, sa->stime.nsec); btrfs_set_stack_timespec_sec(&root_item->rtime, sa->rtime.sec); btrfs_set_stack_timespec_nsec(&root_item->rtime, sa->rtime.nsec); |
8ea05e3a4
|
4305 4306 4307 4308 4309 |
ret = btrfs_update_root(trans, root->fs_info->tree_root, &root->root_key, &root->root_item); if (ret < 0) { btrfs_end_transaction(trans, root); |
8ea05e3a4
|
4310 |
goto out; |
dd5f9615f
|
4311 4312 4313 4314 4315 4316 4317 4318 |
} if (received_uuid_changed && !btrfs_is_empty_uuid(sa->uuid)) { ret = btrfs_uuid_tree_add(trans, root->fs_info->uuid_root, sa->uuid, BTRFS_UUID_KEY_RECEIVED_SUBVOL, root->root_key.objectid); if (ret < 0 && ret != -EEXIST) { btrfs_abort_transaction(trans, root, ret); |
8ea05e3a4
|
4319 |
goto out; |
dd5f9615f
|
4320 4321 4322 4323 4324 4325 |
} } ret = btrfs_commit_transaction(trans, root); if (ret < 0) { btrfs_abort_transaction(trans, root, ret); goto out; |
8ea05e3a4
|
4326 |
} |
abccd00f8
|
4327 4328 4329 4330 4331 4332 4333 4334 4335 4336 4337 4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 |
out: up_write(&root->fs_info->subvol_sem); mnt_drop_write_file(file); return ret; } #ifdef CONFIG_64BIT static long btrfs_ioctl_set_received_subvol_32(struct file *file, void __user *arg) { struct btrfs_ioctl_received_subvol_args_32 *args32 = NULL; struct btrfs_ioctl_received_subvol_args *args64 = NULL; int ret = 0; args32 = memdup_user(arg, sizeof(*args32)); if (IS_ERR(args32)) { ret = PTR_ERR(args32); args32 = NULL; goto out; } args64 = kmalloc(sizeof(*args64), GFP_NOFS); |
84dbeb87d
|
4349 4350 |
if (!args64) { ret = -ENOMEM; |
abccd00f8
|
4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403 |
goto out; } memcpy(args64->uuid, args32->uuid, BTRFS_UUID_SIZE); args64->stransid = args32->stransid; args64->rtransid = args32->rtransid; args64->stime.sec = args32->stime.sec; args64->stime.nsec = args32->stime.nsec; args64->rtime.sec = args32->rtime.sec; args64->rtime.nsec = args32->rtime.nsec; args64->flags = args32->flags; ret = _btrfs_ioctl_set_received_subvol(file, args64); if (ret) goto out; memcpy(args32->uuid, args64->uuid, BTRFS_UUID_SIZE); args32->stransid = args64->stransid; args32->rtransid = args64->rtransid; args32->stime.sec = args64->stime.sec; args32->stime.nsec = args64->stime.nsec; args32->rtime.sec = args64->rtime.sec; args32->rtime.nsec = args64->rtime.nsec; args32->flags = args64->flags; ret = copy_to_user(arg, args32, sizeof(*args32)); if (ret) ret = -EFAULT; out: kfree(args32); kfree(args64); return ret; } #endif static long btrfs_ioctl_set_received_subvol(struct file *file, void __user *arg) { struct btrfs_ioctl_received_subvol_args *sa = NULL; int ret = 0; sa = memdup_user(arg, sizeof(*sa)); if (IS_ERR(sa)) { ret = PTR_ERR(sa); sa = NULL; goto out; } ret = _btrfs_ioctl_set_received_subvol(file, sa); if (ret) goto out; |
8ea05e3a4
|
4404 4405 4406 4407 4408 4409 |
ret = copy_to_user(arg, sa, sizeof(*sa)); if (ret) ret = -EFAULT; out: kfree(sa); |
8ea05e3a4
|
4410 4411 |
return ret; } |
867ab667e
|
4412 4413 |
static int btrfs_ioctl_get_fslabel(struct file *file, void __user *arg) { |
6d0379ec4
|
4414 |
struct btrfs_root *root = BTRFS_I(file_inode(file))->root; |
a1b83ac52
|
4415 |
size_t len; |
867ab667e
|
4416 |
int ret; |
a1b83ac52
|
4417 4418 4419 4420 4421 4422 4423 |
char label[BTRFS_LABEL_SIZE]; spin_lock(&root->fs_info->super_lock); memcpy(label, root->fs_info->super_copy->label, BTRFS_LABEL_SIZE); spin_unlock(&root->fs_info->super_lock); len = strnlen(label, BTRFS_LABEL_SIZE); |
867ab667e
|
4424 4425 |
if (len == BTRFS_LABEL_SIZE) { |
efe120a06
|
4426 4427 |
btrfs_warn(root->fs_info, "label is too long, return the first %zu bytes", --len); |
867ab667e
|
4428 |
} |
867ab667e
|
4429 |
ret = copy_to_user(arg, label, len); |
867ab667e
|
4430 4431 4432 |
return ret ? -EFAULT : 0; } |
a8bfd4abe
|
4433 4434 |
static int btrfs_ioctl_set_fslabel(struct file *file, void __user *arg) { |
6d0379ec4
|
4435 |
struct btrfs_root *root = BTRFS_I(file_inode(file))->root; |
a8bfd4abe
|
4436 4437 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447 |
struct btrfs_super_block *super_block = root->fs_info->super_copy; struct btrfs_trans_handle *trans; char label[BTRFS_LABEL_SIZE]; int ret; if (!capable(CAP_SYS_ADMIN)) return -EPERM; if (copy_from_user(label, arg, sizeof(label))) return -EFAULT; if (strnlen(label, BTRFS_LABEL_SIZE) == BTRFS_LABEL_SIZE) { |
efe120a06
|
4448 |
btrfs_err(root->fs_info, "unable to set label with more than %d bytes", |
a8bfd4abe
|
4449 4450 4451 4452 4453 4454 4455 |
BTRFS_LABEL_SIZE - 1); return -EINVAL; } ret = mnt_want_write_file(file); if (ret) return ret; |
a8bfd4abe
|
4456 4457 4458 4459 4460 |
trans = btrfs_start_transaction(root, 0); if (IS_ERR(trans)) { ret = PTR_ERR(trans); goto out_unlock; } |
a1b83ac52
|
4461 |
spin_lock(&root->fs_info->super_lock); |
a8bfd4abe
|
4462 |
strcpy(super_block->label, label); |
a1b83ac52
|
4463 |
spin_unlock(&root->fs_info->super_lock); |
d0270aca8
|
4464 |
ret = btrfs_commit_transaction(trans, root); |
a8bfd4abe
|
4465 4466 |
out_unlock: |
a8bfd4abe
|
4467 4468 4469 |
mnt_drop_write_file(file); return ret; } |
2eaa055fa
|
4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 |
#define INIT_FEATURE_FLAGS(suffix) \ { .compat_flags = BTRFS_FEATURE_COMPAT_##suffix, \ .compat_ro_flags = BTRFS_FEATURE_COMPAT_RO_##suffix, \ .incompat_flags = BTRFS_FEATURE_INCOMPAT_##suffix } static int btrfs_ioctl_get_supported_features(struct file *file, void __user *arg) { static struct btrfs_ioctl_feature_flags features[3] = { INIT_FEATURE_FLAGS(SUPP), INIT_FEATURE_FLAGS(SAFE_SET), INIT_FEATURE_FLAGS(SAFE_CLEAR) }; if (copy_to_user(arg, &features, sizeof(features))) return -EFAULT; return 0; } static int btrfs_ioctl_get_features(struct file *file, void __user *arg) { struct btrfs_root *root = BTRFS_I(file_inode(file))->root; struct btrfs_super_block *super_block = root->fs_info->super_copy; struct btrfs_ioctl_feature_flags features; features.compat_flags = btrfs_super_compat_flags(super_block); features.compat_ro_flags = btrfs_super_compat_ro_flags(super_block); features.incompat_flags = btrfs_super_incompat_flags(super_block); if (copy_to_user(arg, &features, sizeof(features))) return -EFAULT; return 0; } |
3b02a68a6
|
4505 4506 |
static int check_feature_bits(struct btrfs_root *root, enum btrfs_feature_set set, |
2eaa055fa
|
4507 4508 4509 |
u64 change_mask, u64 flags, u64 supported_flags, u64 safe_set, u64 safe_clear) { |
3b02a68a6
|
4510 4511 |
const char *type = btrfs_feature_set_names[set]; char *names; |
2eaa055fa
|
4512 4513 4514 4515 4516 4517 |
u64 disallowed, unsupported; u64 set_mask = flags & change_mask; u64 clear_mask = ~flags & change_mask; unsupported = set_mask & ~supported_flags; if (unsupported) { |
3b02a68a6
|
4518 4519 4520 4521 4522 4523 4524 4525 |
names = btrfs_printable_features(set, unsupported); if (names) { btrfs_warn(root->fs_info, "this kernel does not support the %s feature bit%s", names, strchr(names, ',') ? "s" : ""); kfree(names); } else btrfs_warn(root->fs_info, |
2eaa055fa
|
4526 4527 4528 4529 4530 4531 4532 |
"this kernel does not support %s bits 0x%llx", type, unsupported); return -EOPNOTSUPP; } disallowed = set_mask & ~safe_set; if (disallowed) { |
3b02a68a6
|
4533 4534 4535 4536 4537 4538 4539 4540 |
names = btrfs_printable_features(set, disallowed); if (names) { btrfs_warn(root->fs_info, "can't set the %s feature bit%s while mounted", names, strchr(names, ',') ? "s" : ""); kfree(names); } else btrfs_warn(root->fs_info, |
2eaa055fa
|
4541 4542 4543 4544 4545 4546 4547 |
"can't set %s bits 0x%llx while mounted", type, disallowed); return -EPERM; } disallowed = clear_mask & ~safe_clear; if (disallowed) { |
3b02a68a6
|
4548 4549 4550 4551 4552 4553 4554 4555 |
names = btrfs_printable_features(set, disallowed); if (names) { btrfs_warn(root->fs_info, "can't clear the %s feature bit%s while mounted", names, strchr(names, ',') ? "s" : ""); kfree(names); } else btrfs_warn(root->fs_info, |
2eaa055fa
|
4556 4557 4558 4559 4560 4561 4562 4563 4564 |
"can't clear %s bits 0x%llx while mounted", type, disallowed); return -EPERM; } return 0; } #define check_feature(root, change_mask, flags, mask_base) \ |
3b02a68a6
|
4565 |
check_feature_bits(root, FEAT_##mask_base, change_mask, flags, \ |
2eaa055fa
|
4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 |
BTRFS_FEATURE_ ## mask_base ## _SUPP, \ BTRFS_FEATURE_ ## mask_base ## _SAFE_SET, \ BTRFS_FEATURE_ ## mask_base ## _SAFE_CLEAR) static int btrfs_ioctl_set_features(struct file *file, void __user *arg) { struct btrfs_root *root = BTRFS_I(file_inode(file))->root; struct btrfs_super_block *super_block = root->fs_info->super_copy; struct btrfs_ioctl_feature_flags flags[2]; struct btrfs_trans_handle *trans; u64 newflags; int ret; if (!capable(CAP_SYS_ADMIN)) return -EPERM; if (copy_from_user(flags, arg, sizeof(flags))) return -EFAULT; /* Nothing to do */ if (!flags[0].compat_flags && !flags[0].compat_ro_flags && !flags[0].incompat_flags) return 0; ret = check_feature(root, flags[0].compat_flags, flags[1].compat_flags, COMPAT); if (ret) return ret; ret = check_feature(root, flags[0].compat_ro_flags, flags[1].compat_ro_flags, COMPAT_RO); if (ret) return ret; ret = check_feature(root, flags[0].incompat_flags, flags[1].incompat_flags, INCOMPAT); if (ret) return ret; |
8051aa1a3
|
4604 |
trans = btrfs_start_transaction(root, 0); |
2eaa055fa
|
4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 |
if (IS_ERR(trans)) return PTR_ERR(trans); spin_lock(&root->fs_info->super_lock); newflags = btrfs_super_compat_flags(super_block); newflags |= flags[0].compat_flags & flags[1].compat_flags; newflags &= ~(flags[0].compat_flags & ~flags[1].compat_flags); btrfs_set_super_compat_flags(super_block, newflags); newflags = btrfs_super_compat_ro_flags(super_block); newflags |= flags[0].compat_ro_flags & flags[1].compat_ro_flags; newflags &= ~(flags[0].compat_ro_flags & ~flags[1].compat_ro_flags); btrfs_set_super_compat_ro_flags(super_block, newflags); newflags = btrfs_super_incompat_flags(super_block); newflags |= flags[0].incompat_flags & flags[1].incompat_flags; newflags &= ~(flags[0].incompat_flags & ~flags[1].incompat_flags); btrfs_set_super_incompat_flags(super_block, newflags); spin_unlock(&root->fs_info->super_lock); |
d0270aca8
|
4624 |
return btrfs_commit_transaction(trans, root); |
2eaa055fa
|
4625 |
} |
f46b5a66b
|
4626 4627 4628 |
long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { |
496ad9aa8
|
4629 |
struct btrfs_root *root = BTRFS_I(file_inode(file))->root; |
4bcabaa30
|
4630 |
void __user *argp = (void __user *)arg; |
f46b5a66b
|
4631 4632 |
switch (cmd) { |
6cbff00f4
|
4633 4634 4635 4636 4637 4638 |
case FS_IOC_GETFLAGS: return btrfs_ioctl_getflags(file, argp); case FS_IOC_SETFLAGS: return btrfs_ioctl_setflags(file, argp); case FS_IOC_GETVERSION: return btrfs_ioctl_getversion(file, argp); |
f7039b1d5
|
4639 4640 |
case FITRIM: return btrfs_ioctl_fitrim(file, argp); |
f46b5a66b
|
4641 |
case BTRFS_IOC_SNAP_CREATE: |
fa0d2b9bd
|
4642 |
return btrfs_ioctl_snap_create(file, argp, 0); |
fdfb1e4f6
|
4643 |
case BTRFS_IOC_SNAP_CREATE_V2: |
fa0d2b9bd
|
4644 |
return btrfs_ioctl_snap_create_v2(file, argp, 0); |
3de4586c5
|
4645 |
case BTRFS_IOC_SUBVOL_CREATE: |
fa0d2b9bd
|
4646 |
return btrfs_ioctl_snap_create(file, argp, 1); |
6f72c7e20
|
4647 4648 |
case BTRFS_IOC_SUBVOL_CREATE_V2: return btrfs_ioctl_snap_create_v2(file, argp, 1); |
76dda93c6
|
4649 4650 |
case BTRFS_IOC_SNAP_DESTROY: return btrfs_ioctl_snap_destroy(file, argp); |
0caa102da
|
4651 4652 4653 4654 |
case BTRFS_IOC_SUBVOL_GETFLAGS: return btrfs_ioctl_subvol_getflags(file, argp); case BTRFS_IOC_SUBVOL_SETFLAGS: return btrfs_ioctl_subvol_setflags(file, argp); |
6ef5ed0d3
|
4655 4656 |
case BTRFS_IOC_DEFAULT_SUBVOL: return btrfs_ioctl_default_subvol(file, argp); |
f46b5a66b
|
4657 |
case BTRFS_IOC_DEFRAG: |
1e701a329
|
4658 4659 4660 |
return btrfs_ioctl_defrag(file, NULL); case BTRFS_IOC_DEFRAG_RANGE: return btrfs_ioctl_defrag(file, argp); |
f46b5a66b
|
4661 |
case BTRFS_IOC_RESIZE: |
198605a8e
|
4662 |
return btrfs_ioctl_resize(file, argp); |
f46b5a66b
|
4663 |
case BTRFS_IOC_ADD_DEV: |
4bcabaa30
|
4664 |
return btrfs_ioctl_add_dev(root, argp); |
f46b5a66b
|
4665 |
case BTRFS_IOC_RM_DEV: |
da24927b1
|
4666 |
return btrfs_ioctl_rm_dev(file, argp); |
475f63874
|
4667 4668 4669 4670 |
case BTRFS_IOC_FS_INFO: return btrfs_ioctl_fs_info(root, argp); case BTRFS_IOC_DEV_INFO: return btrfs_ioctl_dev_info(root, argp); |
f46b5a66b
|
4671 |
case BTRFS_IOC_BALANCE: |
9ba1f6e44
|
4672 |
return btrfs_ioctl_balance(file, NULL); |
f46b5a66b
|
4673 |
case BTRFS_IOC_CLONE: |
c5c9cd4d1
|
4674 4675 |
return btrfs_ioctl_clone(file, arg, 0, 0, 0); case BTRFS_IOC_CLONE_RANGE: |
7a865e8ac
|
4676 |
return btrfs_ioctl_clone_range(file, argp); |
f46b5a66b
|
4677 4678 4679 4680 |
case BTRFS_IOC_TRANS_START: return btrfs_ioctl_trans_start(file); case BTRFS_IOC_TRANS_END: return btrfs_ioctl_trans_end(file); |
ac8e9819d
|
4681 4682 4683 4684 |
case BTRFS_IOC_TREE_SEARCH: return btrfs_ioctl_tree_search(file, argp); case BTRFS_IOC_INO_LOOKUP: return btrfs_ioctl_ino_lookup(file, argp); |
d7728c960
|
4685 4686 4687 4688 |
case BTRFS_IOC_INO_PATHS: return btrfs_ioctl_ino_to_path(root, argp); case BTRFS_IOC_LOGICAL_INO: return btrfs_ioctl_logical_to_ino(root, argp); |
1406e4327
|
4689 4690 |
case BTRFS_IOC_SPACE_INFO: return btrfs_ioctl_space_info(root, argp); |
9b1998598
|
4691 4692 |
case BTRFS_IOC_SYNC: { int ret; |
6c255e67c
|
4693 |
ret = btrfs_start_delalloc_roots(root->fs_info, 0, -1); |
9b1998598
|
4694 4695 4696 4697 4698 |
if (ret) return ret; ret = btrfs_sync_fs(file->f_dentry->d_sb, 1); return ret; } |
462045928
|
4699 |
case BTRFS_IOC_START_SYNC: |
9a8c28bec
|
4700 |
return btrfs_ioctl_start_sync(root, argp); |
462045928
|
4701 |
case BTRFS_IOC_WAIT_SYNC: |
9a8c28bec
|
4702 |
return btrfs_ioctl_wait_sync(root, argp); |
475f63874
|
4703 |
case BTRFS_IOC_SCRUB: |
b8e95489b
|
4704 |
return btrfs_ioctl_scrub(file, argp); |
475f63874
|
4705 4706 4707 4708 |
case BTRFS_IOC_SCRUB_CANCEL: return btrfs_ioctl_scrub_cancel(root, argp); case BTRFS_IOC_SCRUB_PROGRESS: return btrfs_ioctl_scrub_progress(root, argp); |
c9e9f97bd
|
4709 |
case BTRFS_IOC_BALANCE_V2: |
9ba1f6e44
|
4710 |
return btrfs_ioctl_balance(file, argp); |
837d5b6e4
|
4711 4712 |
case BTRFS_IOC_BALANCE_CTL: return btrfs_ioctl_balance_ctl(root, arg); |
19a39dce3
|
4713 4714 |
case BTRFS_IOC_BALANCE_PROGRESS: return btrfs_ioctl_balance_progress(root, argp); |
8ea05e3a4
|
4715 4716 |
case BTRFS_IOC_SET_RECEIVED_SUBVOL: return btrfs_ioctl_set_received_subvol(file, argp); |
abccd00f8
|
4717 4718 4719 4720 |
#ifdef CONFIG_64BIT case BTRFS_IOC_SET_RECEIVED_SUBVOL_32: return btrfs_ioctl_set_received_subvol_32(file, argp); #endif |
31db9f7c2
|
4721 4722 |
case BTRFS_IOC_SEND: return btrfs_ioctl_send(file, argp); |
c11d2c236
|
4723 |
case BTRFS_IOC_GET_DEV_STATS: |
b27f7c0c1
|
4724 |
return btrfs_ioctl_get_dev_stats(root, argp); |
5d13a37bd
|
4725 |
case BTRFS_IOC_QUOTA_CTL: |
905b0dda0
|
4726 |
return btrfs_ioctl_quota_ctl(file, argp); |
5d13a37bd
|
4727 |
case BTRFS_IOC_QGROUP_ASSIGN: |
905b0dda0
|
4728 |
return btrfs_ioctl_qgroup_assign(file, argp); |
5d13a37bd
|
4729 |
case BTRFS_IOC_QGROUP_CREATE: |
905b0dda0
|
4730 |
return btrfs_ioctl_qgroup_create(file, argp); |
5d13a37bd
|
4731 |
case BTRFS_IOC_QGROUP_LIMIT: |
905b0dda0
|
4732 |
return btrfs_ioctl_qgroup_limit(file, argp); |
2f2320360
|
4733 4734 4735 4736 |
case BTRFS_IOC_QUOTA_RESCAN: return btrfs_ioctl_quota_rescan(file, argp); case BTRFS_IOC_QUOTA_RESCAN_STATUS: return btrfs_ioctl_quota_rescan_status(file, argp); |
57254b6eb
|
4737 4738 |
case BTRFS_IOC_QUOTA_RESCAN_WAIT: return btrfs_ioctl_quota_rescan_wait(file, argp); |
3f6bcfbd4
|
4739 4740 |
case BTRFS_IOC_DEV_REPLACE: return btrfs_ioctl_dev_replace(root, argp); |
867ab667e
|
4741 4742 |
case BTRFS_IOC_GET_FSLABEL: return btrfs_ioctl_get_fslabel(file, argp); |
a8bfd4abe
|
4743 4744 |
case BTRFS_IOC_SET_FSLABEL: return btrfs_ioctl_set_fslabel(file, argp); |
416161db9
|
4745 4746 |
case BTRFS_IOC_FILE_EXTENT_SAME: return btrfs_ioctl_file_extent_same(file, argp); |
2eaa055fa
|
4747 4748 4749 4750 4751 4752 |
case BTRFS_IOC_GET_SUPPORTED_FEATURES: return btrfs_ioctl_get_supported_features(file, argp); case BTRFS_IOC_GET_FEATURES: return btrfs_ioctl_get_features(file, argp); case BTRFS_IOC_SET_FEATURES: return btrfs_ioctl_set_features(file, argp); |
f46b5a66b
|
4753 4754 4755 4756 |
} return -ENOTTY; } |