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fs/nilfs2/ioctl.c
20.7 KB
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/* * ioctl.c - NILFS ioctl operations. * * Copyright (C) 2007, 2008 Nippon Telegraph and Telephone Corporation. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * * Written by Koji Sato <koji@osrg.net>. */ #include <linux/fs.h> #include <linux/wait.h> |
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#include <linux/slab.h> |
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#include <linux/capability.h> /* capable() */ #include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */ |
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#include <linux/vmalloc.h> |
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#include <linux/compat.h> /* compat_ptr() */ |
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#include <linux/mount.h> /* mnt_want_write(), mnt_drop_write() */ |
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#include <linux/buffer_head.h> |
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#include <linux/nilfs2_fs.h> #include "nilfs.h" #include "segment.h" #include "bmap.h" #include "cpfile.h" #include "sufile.h" #include "dat.h" |
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static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs, struct nilfs_argv *argv, int dir, ssize_t (*dofunc)(struct the_nilfs *, |
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__u64 *, int, |
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void *, size_t, size_t)) { void *buf; |
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void __user *base = (void __user *)(unsigned long)argv->v_base; |
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size_t maxmembs, total, n; |
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ssize_t nr; int ret, i; |
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__u64 pos, ppos; |
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if (argv->v_nmembs == 0) return 0; |
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if (argv->v_size > PAGE_SIZE) return -EINVAL; buf = (void *)__get_free_pages(GFP_NOFS, 0); if (unlikely(!buf)) |
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return -ENOMEM; |
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maxmembs = PAGE_SIZE / argv->v_size; |
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ret = 0; total = 0; |
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pos = argv->v_index; |
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for (i = 0; i < argv->v_nmembs; i += n) { n = (argv->v_nmembs - i < maxmembs) ? argv->v_nmembs - i : maxmembs; if ((dir & _IOC_WRITE) && |
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copy_from_user(buf, base + argv->v_size * i, argv->v_size * n)) { |
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ret = -EFAULT; break; } |
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ppos = pos; |
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nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size, |
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n); |
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if (nr < 0) { ret = nr; break; } if ((dir & _IOC_READ) && |
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copy_to_user(base + argv->v_size * i, buf, argv->v_size * nr)) { |
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ret = -EFAULT; break; } total += nr; |
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if ((size_t)nr < n) break; if (pos == ppos) pos += n; |
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} argv->v_nmembs = total; |
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free_pages((unsigned long)buf, 0); |
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return ret; } |
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static int nilfs_ioctl_getflags(struct inode *inode, void __user *argp) { unsigned int flags = NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE; return put_user(flags, (int __user *)argp); } static int nilfs_ioctl_setflags(struct inode *inode, struct file *filp, void __user *argp) { struct nilfs_transaction_info ti; unsigned int flags, oldflags; int ret; |
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if (!inode_owner_or_capable(inode)) |
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return -EACCES; if (get_user(flags, (int __user *)argp)) return -EFAULT; ret = mnt_want_write(filp->f_path.mnt); if (ret) return ret; flags = nilfs_mask_flags(inode->i_mode, flags); mutex_lock(&inode->i_mutex); oldflags = NILFS_I(inode)->i_flags; /* * The IMMUTABLE and APPEND_ONLY flags can only be changed by the * relevant capability. */ ret = -EPERM; if (((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) && !capable(CAP_LINUX_IMMUTABLE)) goto out; ret = nilfs_transaction_begin(inode->i_sb, &ti, 0); if (ret) goto out; NILFS_I(inode)->i_flags = (oldflags & ~FS_FL_USER_MODIFIABLE) | (flags & FS_FL_USER_MODIFIABLE); nilfs_set_inode_flags(inode); inode->i_ctime = CURRENT_TIME; if (IS_SYNC(inode)) nilfs_set_transaction_flag(NILFS_TI_SYNC); nilfs_mark_inode_dirty(inode); ret = nilfs_transaction_commit(inode->i_sb); out: mutex_unlock(&inode->i_mutex); mnt_drop_write(filp->f_path.mnt); return ret; } static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp) { return put_user(inode->i_generation, (int __user *)argp); } |
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static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp, unsigned int cmd, void __user *argp) { |
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struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
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struct nilfs_transaction_info ti; struct nilfs_cpmode cpmode; int ret; if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
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ret = mnt_want_write(filp->f_path.mnt); if (ret) return ret; ret = -EFAULT; |
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if (copy_from_user(&cpmode, argp, sizeof(cpmode))) |
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goto out; |
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|
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down_read(&inode->i_sb->s_umount); |
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|
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nilfs_transaction_begin(inode->i_sb, &ti, 0); ret = nilfs_cpfile_change_cpmode( |
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nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode); |
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if (unlikely(ret < 0)) |
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nilfs_transaction_abort(inode->i_sb); |
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else nilfs_transaction_commit(inode->i_sb); /* never fails */ |
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up_read(&inode->i_sb->s_umount); |
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out: mnt_drop_write(filp->f_path.mnt); |
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return ret; } static int nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp, unsigned int cmd, void __user *argp) { |
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struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
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struct nilfs_transaction_info ti; __u64 cno; int ret; if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
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ret = mnt_want_write(filp->f_path.mnt); if (ret) return ret; ret = -EFAULT; |
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if (copy_from_user(&cno, argp, sizeof(cno))) |
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goto out; |
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nilfs_transaction_begin(inode->i_sb, &ti, 0); |
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ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno); |
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if (unlikely(ret < 0)) |
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nilfs_transaction_abort(inode->i_sb); |
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else nilfs_transaction_commit(inode->i_sb); /* never fails */ out: mnt_drop_write(filp->f_path.mnt); |
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return ret; } static ssize_t |
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nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, |
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void *buf, size_t size, size_t nmembs) { |
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int ret; |
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down_read(&nilfs->ns_segctor_sem); |
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ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf, |
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size, nmembs); |
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up_read(&nilfs->ns_segctor_sem); |
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return ret; } static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp, unsigned int cmd, void __user *argp) { |
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struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
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struct nilfs_cpstat cpstat; |
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int ret; |
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down_read(&nilfs->ns_segctor_sem); ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat); up_read(&nilfs->ns_segctor_sem); |
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if (ret < 0) return ret; if (copy_to_user(argp, &cpstat, sizeof(cpstat))) ret = -EFAULT; return ret; } static ssize_t |
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nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, |
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void *buf, size_t size, size_t nmembs) { |
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int ret; |
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down_read(&nilfs->ns_segctor_sem); |
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ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size, nmembs); |
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up_read(&nilfs->ns_segctor_sem); |
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return ret; } static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp, unsigned int cmd, void __user *argp) { |
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struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
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struct nilfs_sustat sustat; |
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int ret; |
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down_read(&nilfs->ns_segctor_sem); ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat); up_read(&nilfs->ns_segctor_sem); |
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if (ret < 0) return ret; if (copy_to_user(argp, &sustat, sizeof(sustat))) ret = -EFAULT; return ret; } static ssize_t |
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nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, |
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void *buf, size_t size, size_t nmembs) { |
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int ret; |
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down_read(&nilfs->ns_segctor_sem); |
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ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs); |
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up_read(&nilfs->ns_segctor_sem); |
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return ret; } static ssize_t |
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nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags, |
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void *buf, size_t size, size_t nmembs) { |
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struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; |
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struct nilfs_bdesc *bdescs = buf; int ret, i; |
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down_read(&nilfs->ns_segctor_sem); |
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for (i = 0; i < nmembs; i++) { ret = nilfs_bmap_lookup_at_level(bmap, bdescs[i].bd_offset, bdescs[i].bd_level + 1, &bdescs[i].bd_blocknr); if (ret < 0) { |
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if (ret != -ENOENT) { up_read(&nilfs->ns_segctor_sem); |
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return ret; |
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} |
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bdescs[i].bd_blocknr = 0; } } |
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up_read(&nilfs->ns_segctor_sem); |
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return nmembs; } static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp, unsigned int cmd, void __user *argp) { |
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struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
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struct nilfs_argv argv; |
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int ret; if (copy_from_user(&argv, argp, sizeof(argv))) return -EFAULT; |
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if (argv.v_size != sizeof(struct nilfs_bdesc)) return -EINVAL; |
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ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), nilfs_ioctl_do_get_bdescs); |
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if (ret < 0) return ret; |
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if (copy_to_user(argp, &argv, sizeof(argv))) ret = -EFAULT; return ret; } static int nilfs_ioctl_move_inode_block(struct inode *inode, struct nilfs_vdesc *vdesc, struct list_head *buffers) { struct buffer_head *bh; int ret; if (vdesc->vd_flags == 0) ret = nilfs_gccache_submit_read_data( inode, vdesc->vd_offset, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh); else ret = nilfs_gccache_submit_read_node( inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh); if (unlikely(ret < 0)) { if (ret == -ENOENT) printk(KERN_CRIT "%s: invalid virtual block address (%s): " "ino=%llu, cno=%llu, offset=%llu, " "blocknr=%llu, vblocknr=%llu ", __func__, vdesc->vd_flags ? "node" : "data", (unsigned long long)vdesc->vd_ino, (unsigned long long)vdesc->vd_cno, (unsigned long long)vdesc->vd_offset, (unsigned long long)vdesc->vd_blocknr, (unsigned long long)vdesc->vd_vblocknr); return ret; } |
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if (unlikely(!list_empty(&bh->b_assoc_buffers))) { printk(KERN_CRIT "%s: conflicting %s buffer: ino=%llu, " "cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu ", __func__, vdesc->vd_flags ? "node" : "data", (unsigned long long)vdesc->vd_ino, (unsigned long long)vdesc->vd_cno, (unsigned long long)vdesc->vd_offset, (unsigned long long)vdesc->vd_blocknr, (unsigned long long)vdesc->vd_vblocknr); brelse(bh); return -EEXIST; } |
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list_add_tail(&bh->b_assoc_buffers, buffers); return 0; } |
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static int nilfs_ioctl_move_blocks(struct super_block *sb, |
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struct nilfs_argv *argv, void *buf) |
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{ |
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size_t nmembs = argv->v_nmembs; |
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struct the_nilfs *nilfs = sb->s_fs_info; |
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struct inode *inode; struct nilfs_vdesc *vdesc; struct buffer_head *bh, *n; LIST_HEAD(buffers); ino_t ino; __u64 cno; int i, ret; for (i = 0, vdesc = buf; i < nmembs; ) { ino = vdesc->vd_ino; cno = vdesc->vd_cno; |
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inode = nilfs_iget_for_gc(sb, ino, cno); |
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if (IS_ERR(inode)) { ret = PTR_ERR(inode); |
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goto failed; } |
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if (list_empty(&NILFS_I(inode)->i_dirty)) { /* * Add the inode to GC inode list. Garbage Collection * is serialized and no two processes manipulate the * list simultaneously. */ igrab(inode); list_add(&NILFS_I(inode)->i_dirty, &nilfs->ns_gc_inodes); } |
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do { ret = nilfs_ioctl_move_inode_block(inode, vdesc, &buffers); |
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if (unlikely(ret < 0)) { iput(inode); |
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goto failed; |
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} |
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vdesc++; } while (++i < nmembs && vdesc->vd_ino == ino && vdesc->vd_cno == cno); |
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iput(inode); /* The inode still remains in GC inode list */ |
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} list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { ret = nilfs_gccache_wait_and_mark_dirty(bh); if (unlikely(ret < 0)) { |
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WARN_ON(ret == -EEXIST); |
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goto failed; } list_del_init(&bh->b_assoc_buffers); |
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brelse(bh); } return nmembs; failed: list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { list_del_init(&bh->b_assoc_buffers); |
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brelse(bh); } return ret; } |
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static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs, struct nilfs_argv *argv, void *buf) |
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{ |
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size_t nmembs = argv->v_nmembs; |
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struct inode *cpfile = nilfs->ns_cpfile; struct nilfs_period *periods = buf; int ret, i; for (i = 0; i < nmembs; i++) { ret = nilfs_cpfile_delete_checkpoints( cpfile, periods[i].p_start, periods[i].p_end); if (ret < 0) return ret; } return nmembs; } |
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static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs, struct nilfs_argv *argv, void *buf) |
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{ |
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size_t nmembs = argv->v_nmembs; int ret; |
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|
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470 |
ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs); |
7942b919f nilfs2: ioctl ope... |
471 472 473 |
return (ret < 0) ? ret : nmembs; } |
4f6b82883 nilfs2: fix lock ... |
474 475 |
static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs, struct nilfs_argv *argv, void *buf) |
7942b919f nilfs2: ioctl ope... |
476 |
{ |
4f6b82883 nilfs2: fix lock ... |
477 |
size_t nmembs = argv->v_nmembs; |
365e215ce nilfs2: unfold ni... |
478 |
struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; |
7942b919f nilfs2: ioctl ope... |
479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 |
struct nilfs_bdesc *bdescs = buf; int ret, i; for (i = 0; i < nmembs; i++) { /* XXX: use macro or inline func to check liveness */ ret = nilfs_bmap_lookup_at_level(bmap, bdescs[i].bd_offset, bdescs[i].bd_level + 1, &bdescs[i].bd_blocknr); if (ret < 0) { if (ret != -ENOENT) return ret; bdescs[i].bd_blocknr = 0; } if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr) /* skip dead block */ continue; if (bdescs[i].bd_level == 0) { |
365e215ce nilfs2: unfold ni... |
497 |
ret = nilfs_mdt_mark_block_dirty(nilfs->ns_dat, |
7942b919f nilfs2: ioctl ope... |
498 499 |
bdescs[i].bd_offset); if (ret < 0) { |
1f5abe7e7 nilfs2: replace B... |
500 |
WARN_ON(ret == -ENOENT); |
7942b919f nilfs2: ioctl ope... |
501 502 503 504 505 506 |
return ret; } } else { ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset, bdescs[i].bd_level); if (ret < 0) { |
1f5abe7e7 nilfs2: replace B... |
507 |
WARN_ON(ret == -ENOENT); |
7942b919f nilfs2: ioctl ope... |
508 509 510 511 512 513 |
return ret; } } } return nmembs; } |
7942b919f nilfs2: ioctl ope... |
514 |
int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs, |
4f6b82883 nilfs2: fix lock ... |
515 |
struct nilfs_argv *argv, void **kbufs) |
7942b919f nilfs2: ioctl ope... |
516 |
{ |
1f5abe7e7 nilfs2: replace B... |
517 |
const char *msg; |
4f6b82883 nilfs2: fix lock ... |
518 |
int ret; |
7942b919f nilfs2: ioctl ope... |
519 |
|
4f6b82883 nilfs2: fix lock ... |
520 |
ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]); |
1f5abe7e7 nilfs2: replace B... |
521 522 523 524 525 526 527 528 |
if (ret < 0) { /* * can safely abort because checkpoints can be removed * independently. */ msg = "cannot delete checkpoints"; goto failed; } |
4f6b82883 nilfs2: fix lock ... |
529 |
ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]); |
1f5abe7e7 nilfs2: replace B... |
530 531 532 533 534 535 536 537 |
if (ret < 0) { /* * can safely abort because DAT file is updated atomically * using a copy-on-write technique. */ msg = "cannot delete virtual blocks from DAT file"; goto failed; } |
4f6b82883 nilfs2: fix lock ... |
538 |
ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]); |
1f5abe7e7 nilfs2: replace B... |
539 540 541 542 543 544 545 |
if (ret < 0) { /* * can safely abort because the operation is nondestructive. */ msg = "cannot mark copying blocks dirty"; goto failed; } |
7942b919f nilfs2: ioctl ope... |
546 |
return 0; |
1f5abe7e7 nilfs2: replace B... |
547 |
failed: |
1f5abe7e7 nilfs2: replace B... |
548 549 550 |
printk(KERN_ERR "NILFS: GC failed during preparation: %s: err=%d ", msg, ret); |
7942b919f nilfs2: ioctl ope... |
551 552 553 554 555 556 |
return ret; } static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp, unsigned int cmd, void __user *argp) { |
4f6b82883 nilfs2: fix lock ... |
557 |
struct nilfs_argv argv[5]; |
33e189bd5 nilfs2: Storage c... |
558 |
static const size_t argsz[5] = { |
4f6b82883 nilfs2: fix lock ... |
559 560 561 562 563 564 565 566 567 568 569 |
sizeof(struct nilfs_vdesc), sizeof(struct nilfs_period), sizeof(__u64), sizeof(struct nilfs_bdesc), sizeof(__u64), }; void __user *base; void *kbufs[5]; struct the_nilfs *nilfs; size_t len, nsegs; int n, ret; |
7942b919f nilfs2: ioctl ope... |
570 571 |
if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
4f6b82883 nilfs2: fix lock ... |
572 |
|
7512487e6 nilfs2: use mnt_w... |
573 574 575 576 577 |
ret = mnt_want_write(filp->f_path.mnt); if (ret) return ret; ret = -EFAULT; |
4f6b82883 nilfs2: fix lock ... |
578 |
if (copy_from_user(argv, argp, sizeof(argv))) |
7512487e6 nilfs2: use mnt_w... |
579 |
goto out; |
4f6b82883 nilfs2: fix lock ... |
580 |
|
7512487e6 nilfs2: use mnt_w... |
581 |
ret = -EINVAL; |
4f6b82883 nilfs2: fix lock ... |
582 583 |
nsegs = argv[4].v_nmembs; if (argv[4].v_size != argsz[4]) |
7512487e6 nilfs2: use mnt_w... |
584 |
goto out; |
4f6b82883 nilfs2: fix lock ... |
585 586 587 588 589 590 591 |
/* * argv[4] points to segment numbers this ioctl cleans. We * use kmalloc() for its buffer because memory used for the * segment numbers is enough small. */ kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base, nsegs * sizeof(__u64)); |
7512487e6 nilfs2: use mnt_w... |
592 593 594 595 |
if (IS_ERR(kbufs[4])) { ret = PTR_ERR(kbufs[4]); goto out; } |
e3154e974 nilfs2: get rid o... |
596 |
nilfs = inode->i_sb->s_fs_info; |
4f6b82883 nilfs2: fix lock ... |
597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 |
for (n = 0; n < 4; n++) { ret = -EINVAL; if (argv[n].v_size != argsz[n]) goto out_free; if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment) goto out_free; len = argv[n].v_size * argv[n].v_nmembs; base = (void __user *)(unsigned long)argv[n].v_base; if (len == 0) { kbufs[n] = NULL; continue; } kbufs[n] = vmalloc(len); if (!kbufs[n]) { ret = -ENOMEM; goto out_free; } if (copy_from_user(kbufs[n], base, len)) { ret = -EFAULT; vfree(kbufs[n]); goto out_free; } } |
1cf58fa84 nilfs2: shorten f... |
624 |
/* |
263d90cef nilfs2: remove ow... |
625 |
* nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(), |
1cf58fa84 nilfs2: shorten f... |
626 627 628 629 630 631 632 633 |
* which will operates an inode list without blocking. * To protect the list from concurrent operations, * nilfs_ioctl_move_blocks should be atomic operation. */ if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) { ret = -EBUSY; goto out_free; } |
5beb6e0b2 nilfs2: add bdev ... |
634 |
vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); |
263d90cef nilfs2: remove ow... |
635 |
ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]); |
1cf58fa84 nilfs2: shorten f... |
636 637 638 639 640 641 |
if (ret < 0) printk(KERN_ERR "NILFS: GC failed during preparation: " "cannot read source blocks: err=%d ", ret); else ret = nilfs_clean_segments(inode->i_sb, argv, kbufs); |
263d90cef nilfs2: remove ow... |
642 |
nilfs_remove_all_gcinodes(nilfs); |
1cf58fa84 nilfs2: shorten f... |
643 |
clear_nilfs_gc_running(nilfs); |
4f6b82883 nilfs2: fix lock ... |
644 |
|
7512487e6 nilfs2: use mnt_w... |
645 |
out_free: |
d50468536 nilfs2: fix memor... |
646 |
while (--n >= 0) |
4f6b82883 nilfs2: fix lock ... |
647 648 |
vfree(kbufs[n]); kfree(kbufs[4]); |
7512487e6 nilfs2: use mnt_w... |
649 650 |
out: mnt_drop_write(filp->f_path.mnt); |
4f6b82883 nilfs2: fix lock ... |
651 |
return ret; |
7942b919f nilfs2: ioctl ope... |
652 653 654 655 656 657 658 |
} static int nilfs_ioctl_sync(struct inode *inode, struct file *filp, unsigned int cmd, void __user *argp) { __u64 cno; int ret; |
0d561f12b nilfs2: add reade... |
659 |
struct the_nilfs *nilfs; |
7942b919f nilfs2: ioctl ope... |
660 661 662 663 664 665 |
ret = nilfs_construct_segment(inode->i_sb); if (ret < 0) return ret; if (argp != NULL) { |
e3154e974 nilfs2: get rid o... |
666 |
nilfs = inode->i_sb->s_fs_info; |
0d561f12b nilfs2: add reade... |
667 668 669 |
down_read(&nilfs->ns_segctor_sem); cno = nilfs->ns_cno - 1; up_read(&nilfs->ns_segctor_sem); |
7942b919f nilfs2: ioctl ope... |
670 671 672 673 674 |
if (copy_to_user(argp, &cno, sizeof(cno))) return -EFAULT; } return 0; } |
4e33f9eab nilfs2: implement... |
675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 |
static int nilfs_ioctl_resize(struct inode *inode, struct file *filp, void __user *argp) { __u64 newsize; int ret = -EPERM; if (!capable(CAP_SYS_ADMIN)) goto out; ret = mnt_want_write(filp->f_path.mnt); if (ret) goto out; ret = -EFAULT; if (copy_from_user(&newsize, argp, sizeof(newsize))) goto out_drop_write; ret = nilfs_resize_fs(inode->i_sb, newsize); out_drop_write: mnt_drop_write(filp->f_path.mnt); out: return ret; } |
619205da5 nilfs2: add ioctl... |
699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 |
static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp) { struct the_nilfs *nilfs = inode->i_sb->s_fs_info; __u64 range[2]; __u64 minseg, maxseg; unsigned long segbytes; int ret = -EPERM; if (!capable(CAP_SYS_ADMIN)) goto out; ret = -EFAULT; if (copy_from_user(range, argp, sizeof(__u64[2]))) goto out; ret = -ERANGE; if (range[1] > i_size_read(inode->i_sb->s_bdev->bd_inode)) goto out; segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize; minseg = range[0] + segbytes - 1; do_div(minseg, segbytes); maxseg = NILFS_SB2_OFFSET_BYTES(range[1]); do_div(maxseg, segbytes); maxseg--; ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg); out: return ret; } |
47eb6b9c8 nilfs2: fix possi... |
730 731 |
static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp, unsigned int cmd, void __user *argp, |
83aca8f48 nilfs2: check siz... |
732 |
size_t membsz, |
47eb6b9c8 nilfs2: fix possi... |
733 734 735 736 737 |
ssize_t (*dofunc)(struct the_nilfs *, __u64 *, int, void *, size_t, size_t)) { |
e3154e974 nilfs2: get rid o... |
738 |
struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
47eb6b9c8 nilfs2: fix possi... |
739 740 741 742 743 |
struct nilfs_argv argv; int ret; if (copy_from_user(&argv, argp, sizeof(argv))) return -EFAULT; |
003ff182f nilfs2: allow fut... |
744 |
if (argv.v_size < membsz) |
83aca8f48 nilfs2: check siz... |
745 |
return -EINVAL; |
47eb6b9c8 nilfs2: fix possi... |
746 747 748 749 750 751 752 753 |
ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc); if (ret < 0) return ret; if (copy_to_user(argp, &argv, sizeof(argv))) ret = -EFAULT; return ret; } |
7a9461939 nilfs2: use unloc... |
754 |
long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
7942b919f nilfs2: ioctl ope... |
755 |
{ |
7a9461939 nilfs2: use unloc... |
756 |
struct inode *inode = filp->f_dentry->d_inode; |
753234007 nilfs2: fix a wro... |
757 |
void __user *argp = (void __user *)arg; |
7942b919f nilfs2: ioctl ope... |
758 759 |
switch (cmd) { |
cde98f0f8 nilfs2: implement... |
760 761 762 763 764 765 |
case FS_IOC_GETFLAGS: return nilfs_ioctl_getflags(inode, argp); case FS_IOC_SETFLAGS: return nilfs_ioctl_setflags(inode, filp, argp); case FS_IOC_GETVERSION: return nilfs_ioctl_getversion(inode, argp); |
7942b919f nilfs2: ioctl ope... |
766 767 768 769 770 |
case NILFS_IOCTL_CHANGE_CPMODE: return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp); case NILFS_IOCTL_DELETE_CHECKPOINT: return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp); case NILFS_IOCTL_GET_CPINFO: |
47eb6b9c8 nilfs2: fix possi... |
771 |
return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
83aca8f48 nilfs2: check siz... |
772 |
sizeof(struct nilfs_cpinfo), |
47eb6b9c8 nilfs2: fix possi... |
773 |
nilfs_ioctl_do_get_cpinfo); |
7942b919f nilfs2: ioctl ope... |
774 775 776 |
case NILFS_IOCTL_GET_CPSTAT: return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp); case NILFS_IOCTL_GET_SUINFO: |
47eb6b9c8 nilfs2: fix possi... |
777 |
return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
83aca8f48 nilfs2: check siz... |
778 |
sizeof(struct nilfs_suinfo), |
47eb6b9c8 nilfs2: fix possi... |
779 |
nilfs_ioctl_do_get_suinfo); |
7942b919f nilfs2: ioctl ope... |
780 781 782 |
case NILFS_IOCTL_GET_SUSTAT: return nilfs_ioctl_get_sustat(inode, filp, cmd, argp); case NILFS_IOCTL_GET_VINFO: |
47eb6b9c8 nilfs2: fix possi... |
783 |
return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
83aca8f48 nilfs2: check siz... |
784 |
sizeof(struct nilfs_vinfo), |
47eb6b9c8 nilfs2: fix possi... |
785 |
nilfs_ioctl_do_get_vinfo); |
7942b919f nilfs2: ioctl ope... |
786 787 788 789 |
case NILFS_IOCTL_GET_BDESCS: return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp); case NILFS_IOCTL_CLEAN_SEGMENTS: return nilfs_ioctl_clean_segments(inode, filp, cmd, argp); |
7942b919f nilfs2: ioctl ope... |
790 791 |
case NILFS_IOCTL_SYNC: return nilfs_ioctl_sync(inode, filp, cmd, argp); |
4e33f9eab nilfs2: implement... |
792 793 |
case NILFS_IOCTL_RESIZE: return nilfs_ioctl_resize(inode, filp, argp); |
619205da5 nilfs2: add ioctl... |
794 795 |
case NILFS_IOCTL_SET_ALLOC_RANGE: return nilfs_ioctl_set_alloc_range(inode, argp); |
7942b919f nilfs2: ioctl ope... |
796 797 798 799 |
default: return -ENOTTY; } } |
828b1c50a nilfs2: add compa... |
800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 |
#ifdef CONFIG_COMPAT long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { switch (cmd) { case FS_IOC32_GETFLAGS: cmd = FS_IOC_GETFLAGS; break; case FS_IOC32_SETFLAGS: cmd = FS_IOC_SETFLAGS; break; case FS_IOC32_GETVERSION: cmd = FS_IOC_GETVERSION; break; default: return -ENOIOCTLCMD; } return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); } #endif |