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fs/fuse/inode.c
41.2 KB
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/* FUSE: Filesystem in Userspace |
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Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu> |
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This program can be distributed under the terms of the GNU GPL. See the file COPYING. */ #include "fuse_i.h" #include <linux/pagemap.h> #include <linux/slab.h> #include <linux/file.h> |
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#include <linux/seq_file.h> #include <linux/init.h> #include <linux/module.h> |
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#include <linux/moduleparam.h> |
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#include <linux/fs_context.h> #include <linux/fs_parser.h> |
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#include <linux/statfs.h> |
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#include <linux/random.h> |
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#include <linux/sched.h> |
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#include <linux/exportfs.h> |
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#include <linux/posix_acl.h> |
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#include <linux/pid_namespace.h> |
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MODULE_AUTHOR("Miklos Szeredi <miklos@szeredi.hu>"); MODULE_DESCRIPTION("Filesystem in Userspace"); MODULE_LICENSE("GPL"); |
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static struct kmem_cache *fuse_inode_cachep; |
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struct list_head fuse_conn_list; DEFINE_MUTEX(fuse_mutex); |
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|
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static int set_global_limit(const char *val, const struct kernel_param *kp); |
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|
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unsigned max_user_bgreq; |
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module_param_call(max_user_bgreq, set_global_limit, param_get_uint, &max_user_bgreq, 0644); __MODULE_PARM_TYPE(max_user_bgreq, "uint"); MODULE_PARM_DESC(max_user_bgreq, "Global limit for the maximum number of backgrounded requests an " "unprivileged user can set"); |
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unsigned max_user_congthresh; |
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module_param_call(max_user_congthresh, set_global_limit, param_get_uint, &max_user_congthresh, 0644); __MODULE_PARM_TYPE(max_user_congthresh, "uint"); MODULE_PARM_DESC(max_user_congthresh, "Global limit for the maximum congestion threshold an " "unprivileged user can set"); |
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#define FUSE_SUPER_MAGIC 0x65735546 |
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#define FUSE_DEFAULT_BLKSIZE 512 |
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/** Maximum number of outstanding background requests */ #define FUSE_DEFAULT_MAX_BACKGROUND 12 /** Congestion starts at 75% of maximum */ #define FUSE_DEFAULT_CONGESTION_THRESHOLD (FUSE_DEFAULT_MAX_BACKGROUND * 3 / 4) |
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#ifdef CONFIG_BLOCK static struct file_system_type fuseblk_fs_type; #endif |
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struct fuse_forget_link *fuse_alloc_forget(void) |
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{ |
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return kzalloc(sizeof(struct fuse_forget_link), GFP_KERNEL_ACCOUNT); |
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} |
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static struct inode *fuse_alloc_inode(struct super_block *sb) { |
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struct fuse_inode *fi; |
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fi = kmem_cache_alloc(fuse_inode_cachep, GFP_KERNEL); if (!fi) |
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return NULL; |
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fi->i_time = 0; |
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fi->inval_mask = 0; |
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fi->nodeid = 0; |
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fi->nlookup = 0; |
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fi->attr_version = 0; |
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fi->orig_ino = 0; |
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fi->state = 0; |
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mutex_init(&fi->mutex); |
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init_rwsem(&fi->i_mmap_sem); |
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spin_lock_init(&fi->lock); |
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fi->forget = fuse_alloc_forget(); |
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if (!fi->forget) goto out_free; if (IS_ENABLED(CONFIG_FUSE_DAX) && !fuse_dax_inode_alloc(sb, fi)) goto out_free_forget; |
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|
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return &fi->inode; |
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out_free_forget: kfree(fi->forget); out_free: kmem_cache_free(fuse_inode_cachep, fi); return NULL; |
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} |
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static void fuse_free_inode(struct inode *inode) |
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{ |
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struct fuse_inode *fi = get_fuse_inode(inode); |
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|
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mutex_destroy(&fi->mutex); |
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kfree(fi->forget); |
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#ifdef CONFIG_FUSE_DAX kfree(fi->dax); #endif |
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kmem_cache_free(fuse_inode_cachep, fi); |
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} |
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static void fuse_evict_inode(struct inode *inode) |
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{ |
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struct fuse_inode *fi = get_fuse_inode(inode); |
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truncate_inode_pages_final(&inode->i_data); |
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clear_inode(inode); |
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if (inode->i_sb->s_flags & SB_ACTIVE) { |
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struct fuse_conn *fc = get_fuse_conn(inode); |
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if (FUSE_IS_DAX(inode)) fuse_dax_inode_cleanup(inode); |
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if (fi->nlookup) { fuse_queue_forget(fc, fi->forget, fi->nodeid, fi->nlookup); fi->forget = NULL; } |
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} |
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if (S_ISREG(inode->i_mode) && !fuse_is_bad(inode)) { |
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WARN_ON(!list_empty(&fi->write_files)); WARN_ON(!list_empty(&fi->queued_writes)); } |
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} |
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static int fuse_reconfigure(struct fs_context *fc) |
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{ |
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struct super_block *sb = fc->root->d_sb; |
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sync_filesystem(sb); |
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if (fc->sb_flags & SB_MANDLOCK) |
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return -EINVAL; return 0; } |
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/* * ino_t is 32-bits on 32-bit arch. We have to squash the 64-bit value down * so that it will fit. */ static ino_t fuse_squash_ino(u64 ino64) { ino_t ino = (ino_t) ino64; if (sizeof(ino_t) < sizeof(u64)) ino ^= ino64 >> (sizeof(u64) - sizeof(ino_t)) * 8; return ino; } |
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void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr, u64 attr_valid) |
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{ |
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struct fuse_conn *fc = get_fuse_conn(inode); |
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struct fuse_inode *fi = get_fuse_inode(inode); |
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|
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lockdep_assert_held(&fi->lock); |
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fi->attr_version = atomic64_inc_return(&fc->attr_version); |
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fi->i_time = attr_valid; |
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WRITE_ONCE(fi->inval_mask, 0); |
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|
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inode->i_ino = fuse_squash_ino(attr->ino); |
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inode->i_mode = (inode->i_mode & S_IFMT) | (attr->mode & 07777); |
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set_nlink(inode, attr->nlink); |
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inode->i_uid = make_kuid(fc->user_ns, attr->uid); inode->i_gid = make_kgid(fc->user_ns, attr->gid); |
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inode->i_blocks = attr->blocks; inode->i_atime.tv_sec = attr->atime; inode->i_atime.tv_nsec = attr->atimensec; |
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/* mtime from server may be stale due to local buffered write */ if (!fc->writeback_cache || !S_ISREG(inode->i_mode)) { inode->i_mtime.tv_sec = attr->mtime; inode->i_mtime.tv_nsec = attr->mtimensec; |
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inode->i_ctime.tv_sec = attr->ctime; inode->i_ctime.tv_nsec = attr->ctimensec; |
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} |
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if (attr->blksize != 0) inode->i_blkbits = ilog2(attr->blksize); else inode->i_blkbits = inode->i_sb->s_blocksize_bits; |
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/* * Don't set the sticky bit in i_mode, unless we want the VFS * to check permissions. This prevents failures due to the * check in may_delete(). */ fi->orig_i_mode = inode->i_mode; |
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if (!fc->default_permissions) |
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inode->i_mode &= ~S_ISVTX; |
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fi->orig_ino = attr->ino; |
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} void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr, u64 attr_valid, u64 attr_version) { struct fuse_conn *fc = get_fuse_conn(inode); struct fuse_inode *fi = get_fuse_inode(inode); |
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bool is_wb = fc->writeback_cache; |
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loff_t oldsize; |
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struct timespec64 old_mtime; |
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spin_lock(&fi->lock); |
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if ((attr_version != 0 && fi->attr_version > attr_version) || test_bit(FUSE_I_SIZE_UNSTABLE, &fi->state)) { |
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spin_unlock(&fi->lock); |
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return; } |
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old_mtime = inode->i_mtime; |
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fuse_change_attributes_common(inode, attr, attr_valid); |
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|
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oldsize = inode->i_size; |
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/* * In case of writeback_cache enabled, the cached writes beyond EOF * extend local i_size without keeping userspace server in sync. So, * attr->size coming from server can be stale. We cannot trust it. */ if (!is_wb || !S_ISREG(inode->i_mode)) i_size_write(inode, attr->size); |
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spin_unlock(&fi->lock); |
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|
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if (!is_wb && S_ISREG(inode->i_mode)) { |
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bool inval = false; if (oldsize != attr->size) { |
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truncate_pagecache(inode, attr->size); |
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if (!fc->explicit_inval_data) inval = true; |
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} else if (fc->auto_inval_data) { |
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struct timespec64 new_mtime = { |
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.tv_sec = attr->mtime, .tv_nsec = attr->mtimensec, }; /* * Auto inval mode also checks and invalidates if mtime * has changed. */ |
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if (!timespec64_equal(&old_mtime, &new_mtime)) |
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inval = true; } if (inval) invalidate_inode_pages2(inode->i_mapping); |
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} |
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} static void fuse_init_inode(struct inode *inode, struct fuse_attr *attr) { inode->i_mode = attr->mode & S_IFMT; |
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inode->i_size = attr->size; |
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inode->i_mtime.tv_sec = attr->mtime; inode->i_mtime.tv_nsec = attr->mtimensec; |
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inode->i_ctime.tv_sec = attr->ctime; inode->i_ctime.tv_nsec = attr->ctimensec; |
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if (S_ISREG(inode->i_mode)) { fuse_init_common(inode); |
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fuse_init_file_inode(inode); |
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} else if (S_ISDIR(inode->i_mode)) fuse_init_dir(inode); else if (S_ISLNK(inode->i_mode)) fuse_init_symlink(inode); else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { fuse_init_common(inode); init_special_inode(inode, inode->i_mode, new_decode_dev(attr->rdev)); |
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} else BUG(); |
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} |
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static int fuse_inode_eq(struct inode *inode, void *_nodeidp) |
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{ |
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u64 nodeid = *(u64 *) _nodeidp; |
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if (get_node_id(inode) == nodeid) return 1; else return 0; } static int fuse_inode_set(struct inode *inode, void *_nodeidp) { |
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u64 nodeid = *(u64 *) _nodeidp; |
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get_fuse_inode(inode)->nodeid = nodeid; return 0; } |
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struct inode *fuse_iget(struct super_block *sb, u64 nodeid, |
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int generation, struct fuse_attr *attr, u64 attr_valid, u64 attr_version) |
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{ struct inode *inode; |
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struct fuse_inode *fi; |
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struct fuse_conn *fc = get_fuse_conn_super(sb); |
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|
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/* * Auto mount points get their node id from the submount root, which is * not a unique identifier within this filesystem. * * To avoid conflicts, do not place submount points into the inode hash * table. */ if (fc->auto_submounts && (attr->flags & FUSE_ATTR_SUBMOUNT) && S_ISDIR(attr->mode)) { inode = new_inode(sb); if (!inode) return NULL; fuse_init_inode(inode, attr); get_fuse_inode(inode)->nodeid = nodeid; inode->i_flags |= S_AUTOMOUNT; goto done; } retry: |
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inode = iget5_locked(sb, nodeid, fuse_inode_eq, fuse_inode_set, &nodeid); if (!inode) return NULL; if ((inode->i_state & I_NEW)) { |
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inode->i_flags |= S_NOATIME; |
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if (!fc->writeback_cache || !S_ISREG(attr->mode)) |
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inode->i_flags |= S_NOCMTIME; |
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inode->i_generation = generation; |
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fuse_init_inode(inode, attr); unlock_new_inode(inode); } else if ((inode->i_mode ^ attr->mode) & S_IFMT) { |
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/* Inode has changed type, any I/O on the old should fail */ |
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fuse_make_bad(inode); |
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iput(inode); |
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goto retry; } |
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done: |
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fi = get_fuse_inode(inode); |
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spin_lock(&fi->lock); |
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fi->nlookup++; |
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spin_unlock(&fi->lock); |
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fuse_change_attributes(inode, attr, attr_valid, attr_version); |
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return inode; } |
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struct inode *fuse_ilookup(struct fuse_conn *fc, u64 nodeid, struct fuse_mount **fm) { struct fuse_mount *fm_iter; struct inode *inode; WARN_ON(!rwsem_is_locked(&fc->killsb)); list_for_each_entry(fm_iter, &fc->mounts, fc_entry) { if (!fm_iter->sb) continue; inode = ilookup5(fm_iter->sb, nodeid, fuse_inode_eq, &nodeid); if (inode) { if (fm) *fm = fm_iter; return inode; } } return NULL; } int fuse_reverse_inval_inode(struct fuse_conn *fc, u64 nodeid, |
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loff_t offset, loff_t len) { |
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struct fuse_inode *fi; |
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struct inode *inode; pgoff_t pg_start; pgoff_t pg_end; |
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inode = fuse_ilookup(fc, nodeid, NULL); |
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if (!inode) return -ENOENT; |
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fi = get_fuse_inode(inode); spin_lock(&fi->lock); fi->attr_version = atomic64_inc_return(&fc->attr_version); spin_unlock(&fi->lock); |
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fuse_invalidate_attr(inode); |
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forget_all_cached_acls(inode); |
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if (offset >= 0) { |
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pg_start = offset >> PAGE_SHIFT; |
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if (len <= 0) pg_end = -1; else |
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pg_end = (offset + len - 1) >> PAGE_SHIFT; |
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invalidate_inode_pages2_range(inode->i_mapping, pg_start, pg_end); } iput(inode); return 0; } |
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bool fuse_lock_inode(struct inode *inode) |
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{ |
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bool locked = false; if (!get_fuse_conn(inode)->parallel_dirops) { |
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mutex_lock(&get_fuse_inode(inode)->mutex); |
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locked = true; } return locked; |
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} |
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void fuse_unlock_inode(struct inode *inode, bool locked) |
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{ |
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if (locked) |
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mutex_unlock(&get_fuse_inode(inode)->mutex); } |
42faad996 [PATCH] restore s... |
401 |
static void fuse_umount_begin(struct super_block *sb) |
69a53bf26 [PATCH] fuse: add... |
402 |
{ |
15c8e72e8 fuse: allow skipp... |
403 404 405 406 |
struct fuse_conn *fc = get_fuse_conn_super(sb); if (!fc->no_force_umount) fuse_abort_conn(fc); |
69a53bf26 [PATCH] fuse: add... |
407 |
} |
fcee216be fuse: split fuse_... |
408 |
static void fuse_send_destroy(struct fuse_mount *fm) |
0ec7ca41f [PATCH] fuse: add... |
409 |
{ |
fcee216be fuse: split fuse_... |
410 |
if (fm->fc->conn_init) { |
1ccd1ea24 fuse: convert des... |
411 412 413 414 415 |
FUSE_ARGS(args); args.opcode = FUSE_DESTROY; args.force = true; args.nocreds = true; |
fcee216be fuse: split fuse_... |
416 |
fuse_simple_request(fm, &args); |
0ec7ca41f [PATCH] fuse: add... |
417 418 |
} } |
a325f9b92 fuse: update fuse... |
419 420 |
static void fuse_put_super(struct super_block *sb) { |
fcee216be fuse: split fuse_... |
421 |
struct fuse_mount *fm = get_fuse_mount_super(sb); |
a325f9b92 fuse: update fuse... |
422 |
|
fcee216be fuse: split fuse_... |
423 |
fuse_mount_put(fm); |
d8a5ba454 [PATCH] FUSE - core |
424 |
} |
e5e5558e9 [PATCH] FUSE - re... |
425 426 427 428 |
static void convert_fuse_statfs(struct kstatfs *stbuf, struct fuse_kstatfs *attr) { stbuf->f_type = FUSE_SUPER_MAGIC; stbuf->f_bsize = attr->bsize; |
de5f12025 [PATCH] fuse: add... |
429 |
stbuf->f_frsize = attr->frsize; |
e5e5558e9 [PATCH] FUSE - re... |
430 431 432 433 434 435 436 437 |
stbuf->f_blocks = attr->blocks; stbuf->f_bfree = attr->bfree; stbuf->f_bavail = attr->bavail; stbuf->f_files = attr->files; stbuf->f_ffree = attr->ffree; stbuf->f_namelen = attr->namelen; /* fsid is left zero */ } |
726c33422 [PATCH] VFS: Perm... |
438 |
static int fuse_statfs(struct dentry *dentry, struct kstatfs *buf) |
e5e5558e9 [PATCH] FUSE - re... |
439 |
{ |
726c33422 [PATCH] VFS: Perm... |
440 |
struct super_block *sb = dentry->d_sb; |
fcee216be fuse: split fuse_... |
441 |
struct fuse_mount *fm = get_fuse_mount_super(sb); |
7078187a7 fuse: introduce f... |
442 |
FUSE_ARGS(args); |
e5e5558e9 [PATCH] FUSE - re... |
443 444 |
struct fuse_statfs_out outarg; int err; |
fcee216be fuse: split fuse_... |
445 |
if (!fuse_allow_current_process(fm->fc)) { |
e57ac6837 fuse: fix allowin... |
446 447 448 |
buf->f_type = FUSE_SUPER_MAGIC; return 0; } |
de5f12025 [PATCH] fuse: add... |
449 |
memset(&outarg, 0, sizeof(outarg)); |
d5b485435 fuse: flatten 'st... |
450 451 452 453 454 455 |
args.in_numargs = 0; args.opcode = FUSE_STATFS; args.nodeid = get_node_id(d_inode(dentry)); args.out_numargs = 1; args.out_args[0].size = sizeof(outarg); args.out_args[0].value = &outarg; |
fcee216be fuse: split fuse_... |
456 |
err = fuse_simple_request(fm, &args); |
e5e5558e9 [PATCH] FUSE - re... |
457 458 |
if (!err) convert_fuse_statfs(buf, &outarg.st); |
e5e5558e9 [PATCH] FUSE - re... |
459 460 |
return err; } |
d8a5ba454 [PATCH] FUSE - core |
461 |
enum { |
c30da2e98 fuse: convert to ... |
462 463 |
OPT_SOURCE, OPT_SUBTYPE, |
d8a5ba454 [PATCH] FUSE - core |
464 465 466 |
OPT_FD, OPT_ROOTMODE, OPT_USER_ID, |
87729a551 [PATCH] FUSE: tig... |
467 |
OPT_GROUP_ID, |
d8a5ba454 [PATCH] FUSE - core |
468 469 |
OPT_DEFAULT_PERMISSIONS, OPT_ALLOW_OTHER, |
db50b96c0 [PATCH] FUSE - re... |
470 |
OPT_MAX_READ, |
d80916140 [PATCH] fuse: add... |
471 |
OPT_BLKSIZE, |
d8a5ba454 [PATCH] FUSE - core |
472 473 |
OPT_ERR }; |
d7167b149 fs_parse: fold fs... |
474 |
static const struct fs_parameter_spec fuse_fs_parameters[] = { |
c30da2e98 fuse: convert to ... |
475 476 477 478 479 480 481 482 483 |
fsparam_string ("source", OPT_SOURCE), fsparam_u32 ("fd", OPT_FD), fsparam_u32oct ("rootmode", OPT_ROOTMODE), fsparam_u32 ("user_id", OPT_USER_ID), fsparam_u32 ("group_id", OPT_GROUP_ID), fsparam_flag ("default_permissions", OPT_DEFAULT_PERMISSIONS), fsparam_flag ("allow_other", OPT_ALLOW_OTHER), fsparam_u32 ("max_read", OPT_MAX_READ), fsparam_u32 ("blksize", OPT_BLKSIZE), |
c7eb68696 vfs: subtype hand... |
484 |
fsparam_string ("subtype", OPT_SUBTYPE), |
c30da2e98 fuse: convert to ... |
485 486 |
{} }; |
c30da2e98 fuse: convert to ... |
487 |
static int fuse_parse_param(struct fs_context *fc, struct fs_parameter *param) |
233a01fa9 fuse: handle larg... |
488 |
{ |
c30da2e98 fuse: convert to ... |
489 490 491 |
struct fs_parse_result result; struct fuse_fs_context *ctx = fc->fs_private; int opt; |
b330966f7 fuse: reject opti... |
492 493 494 495 496 497 498 499 500 501 |
if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { /* * Ignore options coming from mount(MS_REMOUNT) for backward * compatibility. */ if (fc->oldapi) return 0; return invalfc(fc, "No changes allowed in reconfigure"); } |
e8b20a474 fuse: ignore 'dat... |
502 |
|
d7167b149 fs_parse: fold fs... |
503 |
opt = fs_parse(fc, fuse_fs_parameters, param, &result); |
c30da2e98 fuse: convert to ... |
504 505 506 507 508 509 |
if (opt < 0) return opt; switch (opt) { case OPT_SOURCE: if (fc->source) |
2e28c49ea fuse: switch to u... |
510 |
return invalfc(fc, "Multiple sources specified"); |
c30da2e98 fuse: convert to ... |
511 512 513 514 515 516 |
fc->source = param->string; param->string = NULL; break; case OPT_SUBTYPE: if (ctx->subtype) |
2e28c49ea fuse: switch to u... |
517 |
return invalfc(fc, "Multiple subtypes specified"); |
c30da2e98 fuse: convert to ... |
518 519 520 521 522 523 |
ctx->subtype = param->string; param->string = NULL; return 0; case OPT_FD: ctx->fd = result.uint_32; |
cabdb4fa2 fuse: use true,fa... |
524 |
ctx->fd_present = true; |
c30da2e98 fuse: convert to ... |
525 526 527 528 |
break; case OPT_ROOTMODE: if (!fuse_valid_type(result.uint_32)) |
2e28c49ea fuse: switch to u... |
529 |
return invalfc(fc, "Invalid rootmode"); |
c30da2e98 fuse: convert to ... |
530 |
ctx->rootmode = result.uint_32; |
cabdb4fa2 fuse: use true,fa... |
531 |
ctx->rootmode_present = true; |
c30da2e98 fuse: convert to ... |
532 533 534 535 536 |
break; case OPT_USER_ID: ctx->user_id = make_kuid(fc->user_ns, result.uint_32); if (!uid_valid(ctx->user_id)) |
2e28c49ea fuse: switch to u... |
537 |
return invalfc(fc, "Invalid user_id"); |
cabdb4fa2 fuse: use true,fa... |
538 |
ctx->user_id_present = true; |
c30da2e98 fuse: convert to ... |
539 540 541 542 543 |
break; case OPT_GROUP_ID: ctx->group_id = make_kgid(fc->user_ns, result.uint_32); if (!gid_valid(ctx->group_id)) |
2e28c49ea fuse: switch to u... |
544 |
return invalfc(fc, "Invalid group_id"); |
cabdb4fa2 fuse: use true,fa... |
545 |
ctx->group_id_present = true; |
c30da2e98 fuse: convert to ... |
546 547 548 |
break; case OPT_DEFAULT_PERMISSIONS: |
cabdb4fa2 fuse: use true,fa... |
549 |
ctx->default_permissions = true; |
c30da2e98 fuse: convert to ... |
550 551 552 |
break; case OPT_ALLOW_OTHER: |
cabdb4fa2 fuse: use true,fa... |
553 |
ctx->allow_other = true; |
c30da2e98 fuse: convert to ... |
554 555 556 557 558 559 560 561 |
break; case OPT_MAX_READ: ctx->max_read = result.uint_32; break; case OPT_BLKSIZE: if (!ctx->is_bdev) |
2e28c49ea fuse: switch to u... |
562 |
return invalfc(fc, "blksize only supported for fuseblk"); |
c30da2e98 fuse: convert to ... |
563 564 565 566 567 |
ctx->blksize = result.uint_32; break; default: return -EINVAL; |
233a01fa9 fuse: handle larg... |
568 |
} |
c30da2e98 fuse: convert to ... |
569 570 |
return 0; |
233a01fa9 fuse: handle larg... |
571 |
} |
c30da2e98 fuse: convert to ... |
572 |
static void fuse_free_fc(struct fs_context *fc) |
d8a5ba454 [PATCH] FUSE - core |
573 |
{ |
c30da2e98 fuse: convert to ... |
574 |
struct fuse_fs_context *ctx = fc->fs_private; |
5a5336827 [PATCH] fuse: str... |
575 |
|
c30da2e98 fuse: convert to ... |
576 577 578 579 |
if (ctx) { kfree(ctx->subtype); kfree(ctx); } |
d8a5ba454 [PATCH] FUSE - core |
580 |
} |
34c80b1d9 vfs: switch ->sho... |
581 |
static int fuse_show_options(struct seq_file *m, struct dentry *root) |
d8a5ba454 [PATCH] FUSE - core |
582 |
{ |
34c80b1d9 vfs: switch ->sho... |
583 584 |
struct super_block *sb = root->d_sb; struct fuse_conn *fc = get_fuse_conn_super(sb); |
d8a5ba454 [PATCH] FUSE - core |
585 |
|
f4fd4ae35 virtiofs: get rid... |
586 587 588 589 590 591 592 593 594 595 596 597 598 599 |
if (fc->legacy_opts_show) { seq_printf(m, ",user_id=%u", from_kuid_munged(fc->user_ns, fc->user_id)); seq_printf(m, ",group_id=%u", from_kgid_munged(fc->user_ns, fc->group_id)); if (fc->default_permissions) seq_puts(m, ",default_permissions"); if (fc->allow_other) seq_puts(m, ",allow_other"); if (fc->max_read != ~0) seq_printf(m, ",max_read=%u", fc->max_read); if (sb->s_bdev && sb->s_blocksize != FUSE_DEFAULT_BLKSIZE) seq_printf(m, ",blksize=%lu", sb->s_blocksize); } |
1dd539577 virtiofs: add a m... |
600 601 602 603 |
#ifdef CONFIG_FUSE_DAX if (fc->dax) seq_puts(m, ",dax"); #endif |
3f22c7467 virtio-fs: don't ... |
604 |
|
d8a5ba454 [PATCH] FUSE - core |
605 606 |
return 0; } |
ae3aad77f fuse: add fuse_iq... |
607 608 609 |
static void fuse_iqueue_init(struct fuse_iqueue *fiq, const struct fuse_iqueue_ops *ops, void *priv) |
f88996a93 fuse: separate ou... |
610 611 |
{ memset(fiq, 0, sizeof(struct fuse_iqueue)); |
76e43c8cc fuse: fix deadloc... |
612 |
spin_lock_init(&fiq->lock); |
f88996a93 fuse: separate ou... |
613 614 615 616 |
init_waitqueue_head(&fiq->waitq); INIT_LIST_HEAD(&fiq->pending); INIT_LIST_HEAD(&fiq->interrupts); fiq->forget_list_tail = &fiq->forget_list_head; |
e16714d87 fuse: duplicate -... |
617 |
fiq->connected = 1; |
ae3aad77f fuse: add fuse_iq... |
618 619 |
fiq->ops = ops; fiq->priv = priv; |
f88996a93 fuse: separate ou... |
620 |
} |
3a2b5b9cd fuse: separate ou... |
621 622 |
static void fuse_pqueue_init(struct fuse_pqueue *fpq) { |
be2ff42c5 fuse: Use hash ta... |
623 |
unsigned int i; |
45a91cb1a fuse: pqueue locking |
624 |
spin_lock_init(&fpq->lock); |
be2ff42c5 fuse: Use hash ta... |
625 626 |
for (i = 0; i < FUSE_PQ_HASH_SIZE; i++) INIT_LIST_HEAD(&fpq->processing[i]); |
3a2b5b9cd fuse: separate ou... |
627 |
INIT_LIST_HEAD(&fpq->io); |
e96edd94d fuse: duplicate -... |
628 |
fpq->connected = 1; |
3a2b5b9cd fuse: separate ou... |
629 |
} |
fcee216be fuse: split fuse_... |
630 631 |
void fuse_conn_init(struct fuse_conn *fc, struct fuse_mount *fm, struct user_namespace *user_ns, |
ae3aad77f fuse: add fuse_iq... |
632 |
const struct fuse_iqueue_ops *fiq_ops, void *fiq_priv) |
d8a5ba454 [PATCH] FUSE - core |
633 |
{ |
0d179aa59 fuse: separate ou... |
634 635 |
memset(fc, 0, sizeof(*fc)); spin_lock_init(&fc->lock); |
ae2dffa39 fuse: introduce f... |
636 |
spin_lock_init(&fc->bg_lock); |
314603f83 FROMLIST: fuse: D... |
637 |
spin_lock_init(&fc->passthrough_req_lock); |
3b463ae0c fuse: invalidatio... |
638 |
init_rwsem(&fc->killsb); |
095fc40ac fuse: convert fus... |
639 |
refcount_set(&fc->count, 1); |
c3696046b fuse: separate pq... |
640 |
atomic_set(&fc->dev_count, 1); |
0d179aa59 fuse: separate ou... |
641 |
init_waitqueue_head(&fc->blocked_waitq); |
ae3aad77f fuse: add fuse_iq... |
642 |
fuse_iqueue_init(&fc->iq, fiq_ops, fiq_priv); |
0d179aa59 fuse: separate ou... |
643 644 |
INIT_LIST_HEAD(&fc->bg_queue); INIT_LIST_HEAD(&fc->entry); |
cc080e9e9 fuse: introduce p... |
645 |
INIT_LIST_HEAD(&fc->devices); |
314603f83 FROMLIST: fuse: D... |
646 |
idr_init(&fc->passthrough_req); |
0d179aa59 fuse: separate ou... |
647 |
atomic_set(&fc->num_waiting, 0); |
7a6d3c8b3 fuse: make the nu... |
648 649 |
fc->max_background = FUSE_DEFAULT_MAX_BACKGROUND; fc->congestion_threshold = FUSE_DEFAULT_CONGESTION_THRESHOLD; |
75126f550 fuse: use atomic6... |
650 |
atomic64_set(&fc->khctr, 0); |
0d179aa59 fuse: separate ou... |
651 |
fc->polled_files = RB_ROOT; |
0aada8847 fuse: skip blocki... |
652 |
fc->blocked = 0; |
796523fb2 fuse: add flag fc... |
653 |
fc->initialized = 0; |
e16714d87 fuse: duplicate -... |
654 |
fc->connected = 1; |
4510d86fb fuse: Convert fc-... |
655 |
atomic64_set(&fc->attr_version, 1); |
0d179aa59 fuse: separate ou... |
656 |
get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key)); |
0b6e9ea04 fuse: Add support... |
657 |
fc->pid_ns = get_pid_ns(task_active_pid_ns(current)); |
8cb08329b fuse: Support fus... |
658 |
fc->user_ns = get_user_ns(user_ns); |
8a3177db5 cuse: fix ioctl |
659 |
fc->max_pages = FUSE_DEFAULT_MAX_PAGES_PER_REQ; |
fcee216be fuse: split fuse_... |
660 661 662 663 664 |
INIT_LIST_HEAD(&fc->mounts); list_add(&fm->fc_entry, &fc->mounts); fm->fc = fc; refcount_set(&fm->count, 1); |
d8a5ba454 [PATCH] FUSE - core |
665 |
} |
0d179aa59 fuse: separate ou... |
666 |
EXPORT_SYMBOL_GPL(fuse_conn_init); |
d8a5ba454 [PATCH] FUSE - core |
667 |
|
bafa96541 [PATCH] fuse: add... |
668 669 |
void fuse_conn_put(struct fuse_conn *fc) { |
095fc40ac fuse: convert fus... |
670 |
if (refcount_dec_and_test(&fc->count)) { |
a62a8ef9d virtio-fs: add vi... |
671 |
struct fuse_iqueue *fiq = &fc->iq; |
1dd539577 virtiofs: add a m... |
672 673 |
if (IS_ENABLED(CONFIG_FUSE_DAX)) fuse_dax_conn_free(fc); |
a62a8ef9d virtio-fs: add vi... |
674 675 |
if (fiq->ops->release) fiq->ops->release(fiq); |
0b6e9ea04 fuse: Add support... |
676 |
put_pid_ns(fc->pid_ns); |
8cb08329b fuse: Support fus... |
677 |
put_user_ns(fc->user_ns); |
43901aabd fuse: add fuse_co... |
678 |
fc->release(fc); |
d2a85164a [PATCH] fuse: fix... |
679 |
} |
bafa96541 [PATCH] fuse: add... |
680 |
} |
08cbf542b fuse: export symb... |
681 |
EXPORT_SYMBOL_GPL(fuse_conn_put); |
bafa96541 [PATCH] fuse: add... |
682 683 684 |
struct fuse_conn *fuse_conn_get(struct fuse_conn *fc) { |
095fc40ac fuse: convert fus... |
685 |
refcount_inc(&fc->count); |
bafa96541 [PATCH] fuse: add... |
686 687 |
return fc; } |
08cbf542b fuse: export symb... |
688 |
EXPORT_SYMBOL_GPL(fuse_conn_get); |
bafa96541 [PATCH] fuse: add... |
689 |
|
fcee216be fuse: split fuse_... |
690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 |
void fuse_mount_put(struct fuse_mount *fm) { if (refcount_dec_and_test(&fm->count)) { if (fm->fc) fuse_conn_put(fm->fc); kfree(fm); } } EXPORT_SYMBOL_GPL(fuse_mount_put); struct fuse_mount *fuse_mount_get(struct fuse_mount *fm) { refcount_inc(&fm->count); return fm; } EXPORT_SYMBOL_GPL(fuse_mount_get); |
b93f858ab fuse: add fuse_ p... |
706 |
static struct inode *fuse_get_root_inode(struct super_block *sb, unsigned mode) |
d8a5ba454 [PATCH] FUSE - core |
707 708 709 710 711 712 |
{ struct fuse_attr attr; memset(&attr, 0, sizeof(attr)); attr.mode = mode; attr.ino = FUSE_ROOT_ID; |
074406fa6 fuse: set i_nlink... |
713 |
attr.nlink = 1; |
1fb69e781 fuse: fix race be... |
714 |
return fuse_iget(sb, 1, 0, &attr, 0, 0); |
d8a5ba454 [PATCH] FUSE - core |
715 |
} |
1729a16c2 fuse: style fixes |
716 |
struct fuse_inode_handle { |
dbd561d23 fuse: add export ... |
717 718 719 720 721 722 723 |
u64 nodeid; u32 generation; }; static struct dentry *fuse_get_dentry(struct super_block *sb, struct fuse_inode_handle *handle) { |
33670fa29 fuse: nfs export ... |
724 |
struct fuse_conn *fc = get_fuse_conn_super(sb); |
dbd561d23 fuse: add export ... |
725 726 727 728 729 730 731 732 |
struct inode *inode; struct dentry *entry; int err = -ESTALE; if (handle->nodeid == 0) goto out_err; inode = ilookup5(sb, handle->nodeid, fuse_inode_eq, &handle->nodeid); |
33670fa29 fuse: nfs export ... |
733 734 |
if (!inode) { struct fuse_entry_out outarg; |
13983d062 qstr: constify in... |
735 |
const struct qstr name = QSTR_INIT(".", 1); |
33670fa29 fuse: nfs export ... |
736 737 738 |
if (!fc->export_support) goto out_err; |
33670fa29 fuse: nfs export ... |
739 740 741 742 743 744 745 746 747 748 749 750 |
err = fuse_lookup_name(sb, handle->nodeid, &name, &outarg, &inode); if (err && err != -ENOENT) goto out_err; if (err || !inode) { err = -ESTALE; goto out_err; } err = -EIO; if (get_node_id(inode) != handle->nodeid) goto out_iput; } |
dbd561d23 fuse: add export ... |
751 752 753 |
err = -ESTALE; if (inode->i_generation != handle->generation) goto out_iput; |
440037287 [PATCH] switch al... |
754 |
entry = d_obtain_alias(inode); |
c35eebe99 switch fuse |
755 |
if (!IS_ERR(entry) && get_node_id(inode) != FUSE_ROOT_ID) |
dbd561d23 fuse: add export ... |
756 |
fuse_invalidate_entry_cache(entry); |
dbd561d23 fuse: add export ... |
757 758 759 760 761 762 763 764 |
return entry; out_iput: iput(inode); out_err: return ERR_PTR(err); } |
b0b0382bb ->encode_fh() API... |
765 766 |
static int fuse_encode_fh(struct inode *inode, u32 *fh, int *max_len, struct inode *parent) |
dbd561d23 fuse: add export ... |
767 |
{ |
b0b0382bb ->encode_fh() API... |
768 |
int len = parent ? 6 : 3; |
dbd561d23 fuse: add export ... |
769 770 |
u64 nodeid; u32 generation; |
5fe0c2378 exportfs: Return ... |
771 772 |
if (*max_len < len) { *max_len = len; |
94e07a759 fs: encode_fh: re... |
773 |
return FILEID_INVALID; |
5fe0c2378 exportfs: Return ... |
774 |
} |
dbd561d23 fuse: add export ... |
775 776 777 778 779 780 781 |
nodeid = get_fuse_inode(inode)->nodeid; generation = inode->i_generation; fh[0] = (u32)(nodeid >> 32); fh[1] = (u32)(nodeid & 0xffffffff); fh[2] = generation; |
b0b0382bb ->encode_fh() API... |
782 |
if (parent) { |
dbd561d23 fuse: add export ... |
783 784 |
nodeid = get_fuse_inode(parent)->nodeid; generation = parent->i_generation; |
dbd561d23 fuse: add export ... |
785 786 787 788 789 790 791 |
fh[3] = (u32)(nodeid >> 32); fh[4] = (u32)(nodeid & 0xffffffff); fh[5] = generation; } *max_len = len; |
b0b0382bb ->encode_fh() API... |
792 |
return parent ? 0x82 : 0x81; |
dbd561d23 fuse: add export ... |
793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 |
} static struct dentry *fuse_fh_to_dentry(struct super_block *sb, struct fid *fid, int fh_len, int fh_type) { struct fuse_inode_handle handle; if ((fh_type != 0x81 && fh_type != 0x82) || fh_len < 3) return NULL; handle.nodeid = (u64) fid->raw[0] << 32; handle.nodeid |= (u64) fid->raw[1]; handle.generation = fid->raw[2]; return fuse_get_dentry(sb, &handle); } static struct dentry *fuse_fh_to_parent(struct super_block *sb, struct fid *fid, int fh_len, int fh_type) { struct fuse_inode_handle parent; if (fh_type != 0x82 || fh_len < 6) return NULL; parent.nodeid = (u64) fid->raw[3] << 32; parent.nodeid |= (u64) fid->raw[4]; parent.generation = fid->raw[5]; return fuse_get_dentry(sb, &parent); } |
33670fa29 fuse: nfs export ... |
822 823 |
static struct dentry *fuse_get_parent(struct dentry *child) { |
2b0143b5c VFS: normal files... |
824 |
struct inode *child_inode = d_inode(child); |
33670fa29 fuse: nfs export ... |
825 826 827 828 |
struct fuse_conn *fc = get_fuse_conn(child_inode); struct inode *inode; struct dentry *parent; struct fuse_entry_out outarg; |
13983d062 qstr: constify in... |
829 |
const struct qstr name = QSTR_INIT("..", 2); |
33670fa29 fuse: nfs export ... |
830 831 832 833 |
int err; if (!fc->export_support) return ERR_PTR(-ESTALE); |
33670fa29 fuse: nfs export ... |
834 835 |
err = fuse_lookup_name(child_inode->i_sb, get_node_id(child_inode), &name, &outarg, &inode); |
440037287 [PATCH] switch al... |
836 837 838 |
if (err) { if (err == -ENOENT) return ERR_PTR(-ESTALE); |
33670fa29 fuse: nfs export ... |
839 |
return ERR_PTR(err); |
33670fa29 fuse: nfs export ... |
840 |
} |
440037287 [PATCH] switch al... |
841 842 |
parent = d_obtain_alias(inode); |
c35eebe99 switch fuse |
843 |
if (!IS_ERR(parent) && get_node_id(inode) != FUSE_ROOT_ID) |
33670fa29 fuse: nfs export ... |
844 |
fuse_invalidate_entry_cache(parent); |
33670fa29 fuse: nfs export ... |
845 846 847 |
return parent; } |
dbd561d23 fuse: add export ... |
848 849 850 851 852 |
static const struct export_operations fuse_export_operations = { .fh_to_dentry = fuse_fh_to_dentry, .fh_to_parent = fuse_fh_to_parent, .encode_fh = fuse_encode_fh, |
33670fa29 fuse: nfs export ... |
853 |
.get_parent = fuse_get_parent, |
dbd561d23 fuse: add export ... |
854 |
}; |
ee9b6d61a [PATCH] Mark stru... |
855 |
static const struct super_operations fuse_super_operations = { |
d8a5ba454 [PATCH] FUSE - core |
856 |
.alloc_inode = fuse_alloc_inode, |
9baf28bbf fuse: switch to -... |
857 |
.free_inode = fuse_free_inode, |
b57922d97 convert remaining... |
858 |
.evict_inode = fuse_evict_inode, |
1e18bda86 fuse: add .write_... |
859 |
.write_inode = fuse_write_inode, |
ead5f0b5f fuse: delete inod... |
860 |
.drop_inode = generic_delete_inode, |
d8a5ba454 [PATCH] FUSE - core |
861 |
.put_super = fuse_put_super, |
69a53bf26 [PATCH] fuse: add... |
862 |
.umount_begin = fuse_umount_begin, |
e5e5558e9 [PATCH] FUSE - re... |
863 |
.statfs = fuse_statfs, |
d8a5ba454 [PATCH] FUSE - core |
864 865 |
.show_options = fuse_show_options, }; |
487ea5af6 fuse: limit user-... |
866 867 |
static void sanitize_global_limit(unsigned *limit) { |
f22f812d5 fuse: fix request... |
868 869 870 871 |
/* * The default maximum number of async requests is calculated to consume * 1/2^13 of the total memory, assuming 392 bytes per request. */ |
487ea5af6 fuse: limit user-... |
872 |
if (*limit == 0) |
f22f812d5 fuse: fix request... |
873 |
*limit = ((totalram_pages() << PAGE_SHIFT) >> 13) / 392; |
487ea5af6 fuse: limit user-... |
874 875 876 877 |
if (*limit >= 1 << 16) *limit = (1 << 16) - 1; } |
e4dca7b7a treewide: Fix fun... |
878 |
static int set_global_limit(const char *val, const struct kernel_param *kp) |
487ea5af6 fuse: limit user-... |
879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 |
{ int rv; rv = param_set_uint(val, kp); if (rv) return rv; sanitize_global_limit((unsigned *)kp->arg); return 0; } static void process_init_limits(struct fuse_conn *fc, struct fuse_init_out *arg) { int cap_sys_admin = capable(CAP_SYS_ADMIN); if (arg->minor < 13) return; sanitize_global_limit(&max_user_bgreq); sanitize_global_limit(&max_user_congthresh); |
ae2dffa39 fuse: introduce f... |
900 |
spin_lock(&fc->bg_lock); |
487ea5af6 fuse: limit user-... |
901 902 903 904 905 906 907 908 909 910 911 912 913 |
if (arg->max_background) { fc->max_background = arg->max_background; if (!cap_sys_admin && fc->max_background > max_user_bgreq) fc->max_background = max_user_bgreq; } if (arg->congestion_threshold) { fc->congestion_threshold = arg->congestion_threshold; if (!cap_sys_admin && fc->congestion_threshold > max_user_congthresh) fc->congestion_threshold = max_user_congthresh; } |
ae2dffa39 fuse: introduce f... |
914 |
spin_unlock(&fc->bg_lock); |
487ea5af6 fuse: limit user-... |
915 |
} |
615047eff fuse: convert ini... |
916 917 918 919 920 |
struct fuse_init_args { struct fuse_args args; struct fuse_init_in in; struct fuse_init_out out; }; |
fcee216be fuse: split fuse_... |
921 |
static void process_init_reply(struct fuse_mount *fm, struct fuse_args *args, |
615047eff fuse: convert ini... |
922 |
int error) |
9b9a04693 [PATCH] fuse: mov... |
923 |
{ |
fcee216be fuse: split fuse_... |
924 |
struct fuse_conn *fc = fm->fc; |
615047eff fuse: convert ini... |
925 926 |
struct fuse_init_args *ia = container_of(args, typeof(*ia), args); struct fuse_init_out *arg = &ia->out; |
fd1a1dc6f virtiofs: impleme... |
927 |
bool ok = true; |
9b9a04693 [PATCH] fuse: mov... |
928 |
|
615047eff fuse: convert ini... |
929 |
if (error || arg->major != FUSE_KERNEL_VERSION) |
fd1a1dc6f virtiofs: impleme... |
930 |
ok = false; |
9b9a04693 [PATCH] fuse: mov... |
931 |
else { |
9cd684551 [PATCH] fuse: fix... |
932 |
unsigned long ra_pages; |
487ea5af6 fuse: limit user-... |
933 |
process_init_limits(fc, arg); |
9cd684551 [PATCH] fuse: fix... |
934 |
if (arg->minor >= 6) { |
09cbfeaf1 mm, fs: get rid o... |
935 |
ra_pages = arg->max_readahead / PAGE_SIZE; |
9cd684551 [PATCH] fuse: fix... |
936 937 |
if (arg->flags & FUSE_ASYNC_READ) fc->async_read = 1; |
714212593 [PATCH] fuse: add... |
938 939 |
if (!(arg->flags & FUSE_POSIX_LOCKS)) fc->no_lock = 1; |
37fb3a30b fuse: fix flock |
940 941 942 |
if (arg->minor >= 17) { if (!(arg->flags & FUSE_FLOCK_LOCKS)) fc->no_flock = 1; |
24114504c fuse: fix flock b... |
943 944 945 |
} else { if (!(arg->flags & FUSE_POSIX_LOCKS)) fc->no_flock = 1; |
37fb3a30b fuse: fix flock |
946 |
} |
6ff958edb fuse: add atomic ... |
947 948 |
if (arg->flags & FUSE_ATOMIC_O_TRUNC) fc->atomic_o_trunc = 1; |
33670fa29 fuse: nfs export ... |
949 950 951 952 953 |
if (arg->minor >= 9) { /* LOOKUP has dependency on proto version */ if (arg->flags & FUSE_EXPORT_SUPPORT) fc->export_support = 1; } |
78bb6cb9a fuse: add flag to... |
954 955 |
if (arg->flags & FUSE_BIG_WRITES) fc->big_writes = 1; |
e0a43ddcc fuse: allow umask... |
956 957 |
if (arg->flags & FUSE_DONT_MASK) fc->dont_mask = 1; |
72d0d248c fuse: add FUSE_AU... |
958 959 |
if (arg->flags & FUSE_AUTO_INVAL_DATA) fc->auto_inval_data = 1; |
ad2ba64dd fuse: allow files... |
960 961 |
else if (arg->flags & FUSE_EXPLICIT_INVAL_DATA) fc->explicit_inval_data = 1; |
28420dad2 fuse: fix readdir... |
962 |
if (arg->flags & FUSE_DO_READDIRPLUS) { |
0b05b1838 fuse: implement N... |
963 |
fc->do_readdirplus = 1; |
28420dad2 fuse: fix readdir... |
964 965 966 |
if (arg->flags & FUSE_READDIRPLUS_AUTO) fc->readdirplus_auto = 1; } |
60b9df7a5 fuse: add flag to... |
967 968 |
if (arg->flags & FUSE_ASYNC_DIO) fc->async_dio = 1; |
4d99ff8f1 fuse: Turn writeb... |
969 970 |
if (arg->flags & FUSE_WRITEBACK_CACHE) fc->writeback_cache = 1; |
5c672ab3f fuse: serialize d... |
971 972 |
if (arg->flags & FUSE_PARALLEL_DIROPS) fc->parallel_dirops = 1; |
5e940c1dd fuse: handle kill... |
973 974 |
if (arg->flags & FUSE_HANDLE_KILLPRIV) fc->handle_killpriv = 1; |
e27c9d387 fuse: fuse: add t... |
975 |
if (arg->time_gran && arg->time_gran <= 1000000000) |
fcee216be fuse: split fuse_... |
976 |
fm->sb->s_time_gran = arg->time_gran; |
60bcc88ad fuse: Add posix A... |
977 |
if ((arg->flags & FUSE_POSIX_ACL)) { |
29433a299 fuse: get rid of ... |
978 |
fc->default_permissions = 1; |
60bcc88ad fuse: Add posix A... |
979 |
fc->posix_acl = 1; |
fcee216be fuse: split fuse_... |
980 |
fm->sb->s_xattr = fuse_acl_xattr_handlers; |
60bcc88ad fuse: Add posix A... |
981 |
} |
5571f1e65 fuse: enable cach... |
982 983 |
if (arg->flags & FUSE_CACHE_SYMLINKS) fc->cache_symlinks = 1; |
3b7008b22 fuse: return -ECO... |
984 985 |
if (arg->flags & FUSE_ABORT_ERROR) fc->abort_err = 1; |
5da784cce fuse: add max_pag... |
986 987 988 989 990 |
if (arg->flags & FUSE_MAX_PAGES) { fc->max_pages = min_t(unsigned int, FUSE_MAX_MAX_PAGES, max_t(unsigned int, arg->max_pages, 1)); } |
fd1a1dc6f virtiofs: impleme... |
991 992 993 994 995 |
if (IS_ENABLED(CONFIG_FUSE_DAX) && arg->flags & FUSE_MAP_ALIGNMENT && !fuse_dax_check_alignment(fc, arg->map_alignment)) { ok = false; } |
314603f83 FROMLIST: fuse: D... |
996 997 998 999 1000 1001 |
if (arg->flags & FUSE_PASSTHROUGH) { fc->passthrough = 1; /* Prevent further stacking */ fm->sb->s_stack_depth = FILESYSTEM_MAX_STACK_DEPTH; } |
714212593 [PATCH] fuse: add... |
1002 |
} else { |
09cbfeaf1 mm, fs: get rid o... |
1003 |
ra_pages = fc->max_read / PAGE_SIZE; |
714212593 [PATCH] fuse: add... |
1004 |
fc->no_lock = 1; |
37fb3a30b fuse: fix flock |
1005 |
fc->no_flock = 1; |
714212593 [PATCH] fuse: add... |
1006 |
} |
9cd684551 [PATCH] fuse: fix... |
1007 |
|
fcee216be fuse: split fuse_... |
1008 1009 |
fm->sb->s_bdi->ra_pages = min(fm->sb->s_bdi->ra_pages, ra_pages); |
9b9a04693 [PATCH] fuse: mov... |
1010 1011 |
fc->minor = arg->minor; fc->max_write = arg->minor < 5 ? 4096 : arg->max_write; |
f948d5643 fuse: fix thinko ... |
1012 |
fc->max_write = max_t(unsigned, 4096, fc->max_write); |
0ec7ca41f [PATCH] fuse: add... |
1013 |
fc->conn_init = 1; |
9b9a04693 [PATCH] fuse: mov... |
1014 |
} |
615047eff fuse: convert ini... |
1015 |
kfree(ia); |
fd1a1dc6f virtiofs: impleme... |
1016 1017 1018 1019 |
if (!ok) { fc->conn_init = 0; fc->conn_error = 1; } |
9759bd518 fuse: add memory ... |
1020 |
fuse_set_initialized(fc); |
08a53cdce [PATCH] fuse: acc... |
1021 |
wake_up_all(&fc->blocked_waitq); |
9b9a04693 [PATCH] fuse: mov... |
1022 |
} |
fcee216be fuse: split fuse_... |
1023 |
void fuse_send_init(struct fuse_mount *fm) |
9b9a04693 [PATCH] fuse: mov... |
1024 |
{ |
615047eff fuse: convert ini... |
1025 |
struct fuse_init_args *ia; |
095da6cbb [PATCH] fuse: fix... |
1026 |
|
615047eff fuse: convert ini... |
1027 1028 1029 1030 |
ia = kzalloc(sizeof(*ia), GFP_KERNEL | __GFP_NOFAIL); ia->in.major = FUSE_KERNEL_VERSION; ia->in.minor = FUSE_KERNEL_MINOR_VERSION; |
fcee216be fuse: split fuse_... |
1031 |
ia->in.max_readahead = fm->sb->s_bdi->ra_pages * PAGE_SIZE; |
615047eff fuse: convert ini... |
1032 1033 |
ia->in.flags |= FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_ATOMIC_O_TRUNC | |
37fb3a30b fuse: fix flock |
1034 |
FUSE_EXPORT_SUPPORT | FUSE_BIG_WRITES | FUSE_DONT_MASK | |
69fe05c90 fuse: add missing... |
1035 |
FUSE_SPLICE_WRITE | FUSE_SPLICE_MOVE | FUSE_SPLICE_READ | |
9446385f0 fuse: fix wrong a... |
1036 |
FUSE_FLOCK_LOCKS | FUSE_HAS_IOCTL_DIR | FUSE_AUTO_INVAL_DATA | |
4d99ff8f1 fuse: Turn writeb... |
1037 |
FUSE_DO_READDIRPLUS | FUSE_READDIRPLUS_AUTO | FUSE_ASYNC_DIO | |
5c672ab3f fuse: serialize d... |
1038 |
FUSE_WRITEBACK_CACHE | FUSE_NO_OPEN_SUPPORT | |
3b7008b22 fuse: return -ECO... |
1039 |
FUSE_PARALLEL_DIROPS | FUSE_HANDLE_KILLPRIV | FUSE_POSIX_ACL | |
d9a9ea94f fuse: support cli... |
1040 |
FUSE_ABORT_ERROR | FUSE_MAX_PAGES | FUSE_CACHE_SYMLINKS | |
314603f83 FROMLIST: fuse: D... |
1041 1042 |
FUSE_NO_OPENDIR_SUPPORT | FUSE_EXPLICIT_INVAL_DATA | FUSE_PASSTHROUGH; |
fd1a1dc6f virtiofs: impleme... |
1043 |
#ifdef CONFIG_FUSE_DAX |
fcee216be fuse: split fuse_... |
1044 |
if (fm->fc->dax) |
fd1a1dc6f virtiofs: impleme... |
1045 1046 |
ia->in.flags |= FUSE_MAP_ALIGNMENT; #endif |
bf109c640 fuse: implement c... |
1047 1048 |
if (fm->fc->auto_submounts) ia->in.flags |= FUSE_SUBMOUNTS; |
615047eff fuse: convert ini... |
1049 1050 1051 1052 1053 |
ia->args.opcode = FUSE_INIT; ia->args.in_numargs = 1; ia->args.in_args[0].size = sizeof(ia->in); ia->args.in_args[0].value = &ia->in; ia->args.out_numargs = 1; |
3ad2f3fbb tree-wide: Assort... |
1054 |
/* Variable length argument used for backward compatibility |
9b9a04693 [PATCH] fuse: mov... |
1055 1056 |
with interface version < 7.5. Rest of init_out is zeroed by do_get_request(), so a short reply is not a problem */ |
cabdb4fa2 fuse: use true,fa... |
1057 |
ia->args.out_argvar = true; |
615047eff fuse: convert ini... |
1058 1059 1060 1061 1062 |
ia->args.out_args[0].size = sizeof(ia->out); ia->args.out_args[0].value = &ia->out; ia->args.force = true; ia->args.nocreds = true; ia->args.end = process_init_reply; |
fcee216be fuse: split fuse_... |
1063 1064 |
if (fuse_simple_background(fm, &ia->args, GFP_KERNEL) != 0) process_init_reply(fm, &ia->args, -ENOTCONN); |
9b9a04693 [PATCH] fuse: mov... |
1065 |
} |
95a84cdb1 fuse: export fuse... |
1066 |
EXPORT_SYMBOL_GPL(fuse_send_init); |
9b9a04693 [PATCH] fuse: mov... |
1067 |
|
314603f83 FROMLIST: fuse: D... |
1068 1069 |
static int free_fuse_passthrough(int id, void *p, void *data) { |
89d676706 FROMLIST: fuse: P... |
1070 1071 1072 1073 |
struct fuse_passthrough *passthrough = (struct fuse_passthrough *)p; fuse_passthrough_release(passthrough); kfree(p); |
314603f83 FROMLIST: fuse: D... |
1074 1075 |
return 0; } |
783863d64 fuse: dissociate ... |
1076 |
void fuse_free_conn(struct fuse_conn *fc) |
43901aabd fuse: add fuse_co... |
1077 |
{ |
cc080e9e9 fuse: introduce p... |
1078 |
WARN_ON(!list_empty(&fc->devices)); |
314603f83 FROMLIST: fuse: D... |
1079 1080 |
idr_for_each(&fc->passthrough_req, free_fuse_passthrough, NULL); idr_destroy(&fc->passthrough_req); |
dd3e2c55a fuse: rcu-delay f... |
1081 |
kfree_rcu(fc, rcu); |
43901aabd fuse: add fuse_co... |
1082 |
} |
783863d64 fuse: dissociate ... |
1083 |
EXPORT_SYMBOL_GPL(fuse_free_conn); |
43901aabd fuse: add fuse_co... |
1084 |
|
a325f9b92 fuse: update fuse... |
1085 1086 1087 |
static int fuse_bdi_init(struct fuse_conn *fc, struct super_block *sb) { int err; |
5f7f7543f fuse: Convert to ... |
1088 |
char *suffix = ""; |
a325f9b92 fuse: update fuse... |
1089 |
|
69c8ebf83 fuseblk: Fix warn... |
1090 |
if (sb->s_bdev) { |
5f7f7543f fuse: Convert to ... |
1091 |
suffix = "-fuseblk"; |
69c8ebf83 fuseblk: Fix warn... |
1092 1093 1094 1095 1096 1097 1098 |
/* * sb->s_bdi points to blkdev's bdi however we want to redirect * it to our private bdi... */ bdi_put(sb->s_bdi); sb->s_bdi = &noop_backing_dev_info; } |
5f7f7543f fuse: Convert to ... |
1099 1100 |
err = super_setup_bdi_name(sb, "%u:%u%s", MAJOR(fc->dev), MINOR(fc->dev), suffix); |
a325f9b92 fuse: update fuse... |
1101 1102 |
if (err) return err; |
5f7f7543f fuse: Convert to ... |
1103 |
/* fuse does it's own writeback accounting */ |
823423ef5 bdi: invert BDI_C... |
1104 1105 |
sb->s_bdi->capabilities &= ~BDI_CAP_WRITEBACK_ACCT; sb->s_bdi->capabilities |= BDI_CAP_STRICTLIMIT; |
a325f9b92 fuse: update fuse... |
1106 |
|
a325f9b92 fuse: update fuse... |
1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 |
/* * For a single fuse filesystem use max 1% of dirty + * writeback threshold. * * This gives about 1M of write buffer for memory maps on a * machine with 1G and 10% dirty_ratio, which should be more * than enough. * * Privileged users can raise it by writing to * * /sys/class/bdi/<bdi>/max_ratio */ |
5f7f7543f fuse: Convert to ... |
1119 |
bdi_set_max_ratio(sb->s_bdi, 1); |
a325f9b92 fuse: update fuse... |
1120 1121 1122 |
return 0; } |
0cd1eb9a4 fuse: separate fu... |
1123 |
struct fuse_dev *fuse_dev_alloc(void) |
cc080e9e9 fuse: introduce p... |
1124 1125 |
{ struct fuse_dev *fud; |
be2ff42c5 fuse: Use hash ta... |
1126 |
struct list_head *pq; |
cc080e9e9 fuse: introduce p... |
1127 1128 |
fud = kzalloc(sizeof(struct fuse_dev), GFP_KERNEL); |
be2ff42c5 fuse: Use hash ta... |
1129 1130 |
if (!fud) return NULL; |
cc080e9e9 fuse: introduce p... |
1131 |
|
be2ff42c5 fuse: Use hash ta... |
1132 1133 1134 1135 |
pq = kcalloc(FUSE_PQ_HASH_SIZE, sizeof(struct list_head), GFP_KERNEL); if (!pq) { kfree(fud); return NULL; |
cc080e9e9 fuse: introduce p... |
1136 |
} |
be2ff42c5 fuse: Use hash ta... |
1137 |
fud->pq.processing = pq; |
be2ff42c5 fuse: Use hash ta... |
1138 |
fuse_pqueue_init(&fud->pq); |
0cd1eb9a4 fuse: separate fu... |
1139 1140 1141 1142 1143 1144 1145 |
return fud; } EXPORT_SYMBOL_GPL(fuse_dev_alloc); void fuse_dev_install(struct fuse_dev *fud, struct fuse_conn *fc) { fud->fc = fuse_conn_get(fc); |
be2ff42c5 fuse: Use hash ta... |
1146 1147 1148 |
spin_lock(&fc->lock); list_add_tail(&fud->entry, &fc->devices); spin_unlock(&fc->lock); |
0cd1eb9a4 fuse: separate fu... |
1149 1150 |
} EXPORT_SYMBOL_GPL(fuse_dev_install); |
be2ff42c5 fuse: Use hash ta... |
1151 |
|
0cd1eb9a4 fuse: separate fu... |
1152 1153 1154 1155 1156 1157 1158 1159 1160 |
struct fuse_dev *fuse_dev_alloc_install(struct fuse_conn *fc) { struct fuse_dev *fud; fud = fuse_dev_alloc(); if (!fud) return NULL; fuse_dev_install(fud, fc); |
cc080e9e9 fuse: introduce p... |
1161 1162 |
return fud; } |
0cd1eb9a4 fuse: separate fu... |
1163 |
EXPORT_SYMBOL_GPL(fuse_dev_alloc_install); |
cc080e9e9 fuse: introduce p... |
1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 |
void fuse_dev_free(struct fuse_dev *fud) { struct fuse_conn *fc = fud->fc; if (fc) { spin_lock(&fc->lock); list_del(&fud->entry); spin_unlock(&fc->lock); fuse_conn_put(fc); } |
d72f70da6 fuse: Fix memory ... |
1176 |
kfree(fud->pq.processing); |
cc080e9e9 fuse: introduce p... |
1177 1178 1179 |
kfree(fud); } EXPORT_SYMBOL_GPL(fuse_dev_free); |
1866d779d fuse: Allow fuse_... |
1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 |
static void fuse_fill_attr_from_inode(struct fuse_attr *attr, const struct fuse_inode *fi) { *attr = (struct fuse_attr){ .ino = fi->inode.i_ino, .size = fi->inode.i_size, .blocks = fi->inode.i_blocks, .atime = fi->inode.i_atime.tv_sec, .mtime = fi->inode.i_mtime.tv_sec, .ctime = fi->inode.i_ctime.tv_sec, .atimensec = fi->inode.i_atime.tv_nsec, .mtimensec = fi->inode.i_mtime.tv_nsec, .ctimensec = fi->inode.i_ctime.tv_nsec, .mode = fi->inode.i_mode, .nlink = fi->inode.i_nlink, .uid = fi->inode.i_uid.val, .gid = fi->inode.i_gid.val, .rdev = fi->inode.i_rdev, .blksize = 1u << fi->inode.i_blkbits, }; } static void fuse_sb_defaults(struct super_block *sb) { sb->s_magic = FUSE_SUPER_MAGIC; sb->s_op = &fuse_super_operations; sb->s_xattr = fuse_xattr_handlers; sb->s_maxbytes = MAX_LFS_FILESIZE; sb->s_time_gran = 1; sb->s_export_op = &fuse_export_operations; sb->s_iflags |= SB_I_IMA_UNVERIFIABLE_SIGNATURE; if (sb->s_user_ns != &init_user_ns) sb->s_iflags |= SB_I_UNTRUSTED_MOUNTER; sb->s_flags &= ~(SB_NOSEC | SB_I_VERSION); /* * If we are not in the initial user namespace posix * acls must be translated. */ if (sb->s_user_ns != &init_user_ns) sb->s_xattr = fuse_no_acl_xattr_handlers; } int fuse_fill_super_submount(struct super_block *sb, struct fuse_inode *parent_fi) { struct fuse_mount *fm = get_fuse_mount_super(sb); struct super_block *parent_sb = parent_fi->inode.i_sb; struct fuse_attr root_attr; struct inode *root; fuse_sb_defaults(sb); fm->sb = sb; WARN_ON(sb->s_bdi != &noop_backing_dev_info); sb->s_bdi = bdi_get(parent_sb->s_bdi); sb->s_xattr = parent_sb->s_xattr; sb->s_time_gran = parent_sb->s_time_gran; sb->s_blocksize = parent_sb->s_blocksize; sb->s_blocksize_bits = parent_sb->s_blocksize_bits; sb->s_subtype = kstrdup(parent_sb->s_subtype, GFP_KERNEL); if (parent_sb->s_subtype && !sb->s_subtype) return -ENOMEM; fuse_fill_attr_from_inode(&root_attr, parent_fi); root = fuse_iget(sb, parent_fi->nodeid, 0, &root_attr, 0, 0); /* * This inode is just a duplicate, so it is not looked up and * its nlookup should not be incremented. fuse_iget() does * that, though, so undo it here. */ get_fuse_inode(root)->nlookup--; sb->s_d_op = &fuse_dentry_operations; sb->s_root = d_make_root(root); if (!sb->s_root) return -ENOMEM; return 0; } |
0cc2656cd fuse: extract fus... |
1260 |
int fuse_fill_super_common(struct super_block *sb, struct fuse_fs_context *ctx) |
d8a5ba454 [PATCH] FUSE - core |
1261 |
{ |
7fd3abfa8 virtiofs: do not ... |
1262 |
struct fuse_dev *fud = NULL; |
fcee216be fuse: split fuse_... |
1263 1264 |
struct fuse_mount *fm = get_fuse_mount_super(sb); struct fuse_conn *fc = fm->fc; |
d8a5ba454 [PATCH] FUSE - core |
1265 |
struct inode *root; |
f543f253f [PATCH] fuse: mak... |
1266 |
struct dentry *root_dentry; |
d8a5ba454 [PATCH] FUSE - core |
1267 |
int err; |
c2b8f0069 fuse: fuse_fill_s... |
1268 |
err = -EINVAL; |
1751e8a6c Rename superblock... |
1269 |
if (sb->s_flags & SB_MANDLOCK) |
c2b8f0069 fuse: fuse_fill_s... |
1270 |
goto err; |
714212593 [PATCH] fuse: add... |
1271 |
|
1866d779d fuse: Allow fuse_... |
1272 |
fuse_sb_defaults(sb); |
9e1f1de02 more conservative... |
1273 |
|
0cc2656cd fuse: extract fus... |
1274 |
if (ctx->is_bdev) { |
875d95ec9 [PATCH] fuse: fix... |
1275 |
#ifdef CONFIG_BLOCK |
c2b8f0069 fuse: fuse_fill_s... |
1276 |
err = -EINVAL; |
c30da2e98 fuse: convert to ... |
1277 |
if (!sb_set_blocksize(sb, ctx->blksize)) |
c2b8f0069 fuse: fuse_fill_s... |
1278 |
goto err; |
875d95ec9 [PATCH] fuse: fix... |
1279 |
#endif |
d80916140 [PATCH] fuse: add... |
1280 |
} else { |
09cbfeaf1 mm, fs: get rid o... |
1281 1282 |
sb->s_blocksize = PAGE_SIZE; sb->s_blocksize_bits = PAGE_SHIFT; |
d80916140 [PATCH] fuse: add... |
1283 |
} |
c30da2e98 fuse: convert to ... |
1284 1285 1286 |
sb->s_subtype = ctx->subtype; ctx->subtype = NULL; |
1dd539577 virtiofs: add a m... |
1287 1288 1289 1290 1291 |
if (IS_ENABLED(CONFIG_FUSE_DAX)) { err = fuse_dax_conn_alloc(fc, ctx->dax_dev); if (err) goto err; } |
e45b2546e fuse: Ensure posi... |
1292 |
|
7fd3abfa8 virtiofs: do not ... |
1293 1294 1295 1296 |
if (ctx->fudptr) { err = -ENOMEM; fud = fuse_dev_alloc_install(fc); if (!fud) |
1dd539577 virtiofs: add a m... |
1297 |
goto err_free_dax; |
7fd3abfa8 virtiofs: do not ... |
1298 |
} |
cc080e9e9 fuse: introduce p... |
1299 |
|
a325f9b92 fuse: update fuse... |
1300 |
fc->dev = sb->s_dev; |
fcee216be fuse: split fuse_... |
1301 |
fm->sb = sb; |
a325f9b92 fuse: update fuse... |
1302 1303 |
err = fuse_bdi_init(fc, sb); if (err) |
cc080e9e9 fuse: introduce p... |
1304 |
goto err_dev_free; |
0d179aa59 fuse: separate ou... |
1305 |
|
e0a43ddcc fuse: allow umask... |
1306 |
/* Handle umasking inside the fuse code */ |
1751e8a6c Rename superblock... |
1307 |
if (sb->s_flags & SB_POSIXACL) |
e0a43ddcc fuse: allow umask... |
1308 |
fc->dont_mask = 1; |
1751e8a6c Rename superblock... |
1309 |
sb->s_flags |= SB_POSIXACL; |
e0a43ddcc fuse: allow umask... |
1310 |
|
c30da2e98 fuse: convert to ... |
1311 1312 1313 1314 |
fc->default_permissions = ctx->default_permissions; fc->allow_other = ctx->allow_other; fc->user_id = ctx->user_id; fc->group_id = ctx->group_id; |
f4fd4ae35 virtiofs: get rid... |
1315 |
fc->legacy_opts_show = ctx->legacy_opts_show; |
1866d779d fuse: Allow fuse_... |
1316 |
fc->max_read = max_t(unsigned int, 4096, ctx->max_read); |
783863d64 fuse: dissociate ... |
1317 |
fc->destroy = ctx->destroy; |
15c8e72e8 fuse: allow skipp... |
1318 1319 |
fc->no_control = ctx->no_control; fc->no_force_umount = ctx->no_force_umount; |
f543f253f [PATCH] fuse: mak... |
1320 |
|
d8a5ba454 [PATCH] FUSE - core |
1321 |
err = -ENOMEM; |
c30da2e98 fuse: convert to ... |
1322 |
root = fuse_get_root_inode(sb, ctx->rootmode); |
0ce267ff9 fuse: fix root de... |
1323 |
sb->s_d_op = &fuse_root_dentry_operations; |
48fde701a switch open-coded... |
1324 1325 |
root_dentry = d_make_root(root); if (!root_dentry) |
cc080e9e9 fuse: introduce p... |
1326 |
goto err_dev_free; |
0ce267ff9 fuse: fix root de... |
1327 |
/* Root dentry doesn't have .d_revalidate */ |
c35eebe99 switch fuse |
1328 |
sb->s_d_op = &fuse_dentry_operations; |
f543f253f [PATCH] fuse: mak... |
1329 |
|
bafa96541 [PATCH] fuse: add... |
1330 |
mutex_lock(&fuse_mutex); |
8aa09a50b [fuse] fix race b... |
1331 |
err = -EINVAL; |
7fd3abfa8 virtiofs: do not ... |
1332 |
if (ctx->fudptr && *ctx->fudptr) |
bafa96541 [PATCH] fuse: add... |
1333 |
goto err_unlock; |
8aa09a50b [fuse] fix race b... |
1334 |
|
bafa96541 [PATCH] fuse: add... |
1335 1336 1337 1338 1339 |
err = fuse_ctl_add_conn(fc); if (err) goto err_unlock; list_add_tail(&fc->entry, &fuse_conn_list); |
f543f253f [PATCH] fuse: mak... |
1340 |
sb->s_root = root_dentry; |
7fd3abfa8 virtiofs: do not ... |
1341 1342 |
if (ctx->fudptr) *ctx->fudptr = fud; |
bafa96541 [PATCH] fuse: add... |
1343 |
mutex_unlock(&fuse_mutex); |
0cc2656cd fuse: extract fus... |
1344 1345 1346 1347 1348 1349 |
return 0; err_unlock: mutex_unlock(&fuse_mutex); dput(root_dentry); err_dev_free: |
7fd3abfa8 virtiofs: do not ... |
1350 1351 |
if (fud) fuse_dev_free(fud); |
1dd539577 virtiofs: add a m... |
1352 1353 1354 |
err_free_dax: if (IS_ENABLED(CONFIG_FUSE_DAX)) fuse_dax_conn_free(fc); |
0cc2656cd fuse: extract fus... |
1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 |
err: return err; } EXPORT_SYMBOL_GPL(fuse_fill_super_common); static int fuse_fill_super(struct super_block *sb, struct fs_context *fsc) { struct fuse_fs_context *ctx = fsc->fs_private; struct file *file; int err; struct fuse_conn *fc; |
fcee216be fuse: split fuse_... |
1366 |
struct fuse_mount *fm; |
0cc2656cd fuse: extract fus... |
1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 |
err = -EINVAL; file = fget(ctx->fd); if (!file) goto err; /* * Require mount to happen from the same user namespace which * opened /dev/fuse to prevent potential attacks. */ if ((file->f_op != &fuse_dev_operations) || (file->f_cred->user_ns != sb->s_user_ns)) goto err_fput; ctx->fudptr = &file->private_data; fc = kmalloc(sizeof(*fc), GFP_KERNEL); err = -ENOMEM; if (!fc) goto err_fput; |
fcee216be fuse: split fuse_... |
1386 1387 1388 1389 1390 1391 1392 |
fm = kzalloc(sizeof(*fm), GFP_KERNEL); if (!fm) { kfree(fc); goto err_fput; } fuse_conn_init(fc, fm, sb->s_user_ns, &fuse_dev_fiq_ops, NULL); |
0cc2656cd fuse: extract fus... |
1393 |
fc->release = fuse_free_conn; |
fcee216be fuse: split fuse_... |
1394 1395 |
sb->s_fs_info = fm; |
0cc2656cd fuse: extract fus... |
1396 1397 1398 1399 |
err = fuse_fill_super_common(sb, ctx); if (err) goto err_put_conn; |
0720b3159 [PATCH] fuse: sim... |
1400 1401 1402 1403 1404 1405 |
/* * atomic_dec_and_test() in fput() provides the necessary * memory barrier for file->private_data to be visible on all * CPUs after this */ fput(file); |
fcee216be fuse: split fuse_... |
1406 |
fuse_send_init(get_fuse_mount_super(sb)); |
d8a5ba454 [PATCH] FUSE - core |
1407 |
return 0; |
c2b8f0069 fuse: fuse_fill_s... |
1408 |
err_put_conn: |
fcee216be fuse: split fuse_... |
1409 |
fuse_mount_put(fm); |
543b8f866 fuse: don't keep ... |
1410 |
sb->s_fs_info = NULL; |
c2b8f0069 fuse: fuse_fill_s... |
1411 1412 1413 |
err_fput: fput(file); err: |
d8a5ba454 [PATCH] FUSE - core |
1414 1415 |
return err; } |
c30da2e98 fuse: convert to ... |
1416 |
static int fuse_get_tree(struct fs_context *fc) |
d8a5ba454 [PATCH] FUSE - core |
1417 |
{ |
c30da2e98 fuse: convert to ... |
1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 |
struct fuse_fs_context *ctx = fc->fs_private; if (!ctx->fd_present || !ctx->rootmode_present || !ctx->user_id_present || !ctx->group_id_present) return -EINVAL; #ifdef CONFIG_BLOCK if (ctx->is_bdev) return get_tree_bdev(fc, fuse_fill_super); #endif return get_tree_nodev(fc, fuse_fill_super); } static const struct fs_context_operations fuse_context_ops = { .free = fuse_free_fc, .parse_param = fuse_parse_param, |
0189a2d36 fuse: use ->recon... |
1435 |
.reconfigure = fuse_reconfigure, |
c30da2e98 fuse: convert to ... |
1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 |
.get_tree = fuse_get_tree, }; /* * Set up the filesystem mount context. */ static int fuse_init_fs_context(struct fs_context *fc) { struct fuse_fs_context *ctx; ctx = kzalloc(sizeof(struct fuse_fs_context), GFP_KERNEL); if (!ctx) return -ENOMEM; ctx->max_read = ~0; ctx->blksize = FUSE_DEFAULT_BLKSIZE; |
f4fd4ae35 virtiofs: get rid... |
1452 |
ctx->legacy_opts_show = true; |
c30da2e98 fuse: convert to ... |
1453 1454 |
#ifdef CONFIG_BLOCK |
783863d64 fuse: dissociate ... |
1455 |
if (fc->fs_type == &fuseblk_fs_type) { |
c30da2e98 fuse: convert to ... |
1456 |
ctx->is_bdev = true; |
783863d64 fuse: dissociate ... |
1457 1458 |
ctx->destroy = true; } |
c30da2e98 fuse: convert to ... |
1459 1460 1461 1462 1463 |
#endif fc->fs_private = ctx; fc->ops = &fuse_context_ops; return 0; |
d8a5ba454 [PATCH] FUSE - core |
1464 |
} |
fcee216be fuse: split fuse_... |
1465 |
bool fuse_mount_remove(struct fuse_mount *fm) |
3b463ae0c fuse: invalidatio... |
1466 |
{ |
fcee216be fuse: split fuse_... |
1467 1468 |
struct fuse_conn *fc = fm->fc; bool last = false; |
3b463ae0c fuse: invalidatio... |
1469 |
|
fcee216be fuse: split fuse_... |
1470 1471 1472 1473 1474 |
down_write(&fc->killsb); list_del_init(&fm->fc_entry); if (list_empty(&fc->mounts)) last = true; up_write(&fc->killsb); |
e8f3bd773 fuse: Fix oops at... |
1475 |
|
fcee216be fuse: split fuse_... |
1476 1477 1478 |
return last; } EXPORT_SYMBOL_GPL(fuse_mount_remove); |
e8f3bd773 fuse: Fix oops at... |
1479 |
|
fcee216be fuse: split fuse_... |
1480 1481 1482 1483 1484 1485 1486 1487 1488 |
void fuse_conn_destroy(struct fuse_mount *fm) { struct fuse_conn *fc = fm->fc; if (fc->destroy) fuse_send_destroy(fm); fuse_abort_conn(fc); fuse_wait_aborted(fc); |
413daa1a3 fuse: connection ... |
1489 1490 1491 1492 1493 1494 |
if (!list_empty(&fc->entry)) { mutex_lock(&fuse_mutex); list_del(&fc->entry); fuse_ctl_remove_conn(fc); mutex_unlock(&fuse_mutex); |
3b463ae0c fuse: invalidatio... |
1495 |
} |
e8f3bd773 fuse: Fix oops at... |
1496 |
} |
fcee216be fuse: split fuse_... |
1497 |
EXPORT_SYMBOL_GPL(fuse_conn_destroy); |
3b463ae0c fuse: invalidatio... |
1498 |
|
fcee216be fuse: split fuse_... |
1499 |
static void fuse_kill_sb_anon(struct super_block *sb) |
e8f3bd773 fuse: Fix oops at... |
1500 |
{ |
fcee216be fuse: split fuse_... |
1501 1502 1503 1504 1505 1506 1507 1508 |
struct fuse_mount *fm = get_fuse_mount_super(sb); bool last; if (fm) { last = fuse_mount_remove(fm); if (last) fuse_conn_destroy(fm); } |
3b463ae0c fuse: invalidatio... |
1509 1510 |
kill_anon_super(sb); } |
875d95ec9 [PATCH] fuse: fix... |
1511 1512 1513 |
static struct file_system_type fuse_fs_type = { .owner = THIS_MODULE, .name = "fuse", |
4ad769f3c fuse: Allow fully... |
1514 |
.fs_flags = FS_HAS_SUBTYPE | FS_USERNS_MOUNT, |
c30da2e98 fuse: convert to ... |
1515 |
.init_fs_context = fuse_init_fs_context, |
d7167b149 fs_parse: fold fs... |
1516 |
.parameters = fuse_fs_parameters, |
3b463ae0c fuse: invalidatio... |
1517 |
.kill_sb = fuse_kill_sb_anon, |
875d95ec9 [PATCH] fuse: fix... |
1518 |
}; |
7f78e0351 fs: Limit sys_mou... |
1519 |
MODULE_ALIAS_FS("fuse"); |
875d95ec9 [PATCH] fuse: fix... |
1520 1521 |
#ifdef CONFIG_BLOCK |
3b463ae0c fuse: invalidatio... |
1522 1523 |
static void fuse_kill_sb_blk(struct super_block *sb) { |
fcee216be fuse: split fuse_... |
1524 1525 1526 1527 1528 1529 1530 1531 |
struct fuse_mount *fm = get_fuse_mount_super(sb); bool last; if (fm) { last = fuse_mount_remove(fm); if (last) fuse_conn_destroy(fm); } |
3b463ae0c fuse: invalidatio... |
1532 1533 |
kill_block_super(sb); } |
d6392f873 [PATCH] fuse: add... |
1534 1535 1536 |
static struct file_system_type fuseblk_fs_type = { .owner = THIS_MODULE, .name = "fuseblk", |
c30da2e98 fuse: convert to ... |
1537 |
.init_fs_context = fuse_init_fs_context, |
d7167b149 fs_parse: fold fs... |
1538 |
.parameters = fuse_fs_parameters, |
3b463ae0c fuse: invalidatio... |
1539 |
.kill_sb = fuse_kill_sb_blk, |
edad01e2a fuse: ->fs_flags ... |
1540 |
.fs_flags = FS_REQUIRES_DEV | FS_HAS_SUBTYPE, |
d6392f873 [PATCH] fuse: add... |
1541 |
}; |
7f78e0351 fs: Limit sys_mou... |
1542 |
MODULE_ALIAS_FS("fuseblk"); |
d6392f873 [PATCH] fuse: add... |
1543 |
|
875d95ec9 [PATCH] fuse: fix... |
1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 |
static inline int register_fuseblk(void) { return register_filesystem(&fuseblk_fs_type); } static inline void unregister_fuseblk(void) { unregister_filesystem(&fuseblk_fs_type); } #else static inline int register_fuseblk(void) { return 0; } static inline void unregister_fuseblk(void) { } #endif |
51cc50685 SL*B: drop kmem c... |
1563 |
static void fuse_inode_init_once(void *foo) |
d8a5ba454 [PATCH] FUSE - core |
1564 |
{ |
1729a16c2 fuse: style fixes |
1565 |
struct inode *inode = foo; |
d8a5ba454 [PATCH] FUSE - core |
1566 |
|
a35afb830 Remove SLAB_CTOR_... |
1567 |
inode_init_once(inode); |
d8a5ba454 [PATCH] FUSE - core |
1568 1569 1570 1571 1572 |
} static int __init fuse_fs_init(void) { int err; |
d6392f873 [PATCH] fuse: add... |
1573 |
fuse_inode_cachep = kmem_cache_create("fuse_inode", |
df206988e fs: fuse: account... |
1574 1575 1576 |
sizeof(struct fuse_inode), 0, SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT|SLAB_RECLAIM_ACCOUNT, fuse_inode_init_once); |
d6392f873 [PATCH] fuse: add... |
1577 1578 |
err = -ENOMEM; if (!fuse_inode_cachep) |
988f03256 fuse: register_fi... |
1579 1580 1581 1582 1583 1584 1585 1586 1587 |
goto out; err = register_fuseblk(); if (err) goto out2; err = register_filesystem(&fuse_fs_type); if (err) goto out3; |
d6392f873 [PATCH] fuse: add... |
1588 1589 |
return 0; |
d8a5ba454 [PATCH] FUSE - core |
1590 |
|
988f03256 fuse: register_fi... |
1591 |
out3: |
875d95ec9 [PATCH] fuse: fix... |
1592 |
unregister_fuseblk(); |
988f03256 fuse: register_fi... |
1593 1594 |
out2: kmem_cache_destroy(fuse_inode_cachep); |
d6392f873 [PATCH] fuse: add... |
1595 |
out: |
d8a5ba454 [PATCH] FUSE - core |
1596 1597 1598 1599 1600 1601 |
return err; } static void fuse_fs_cleanup(void) { unregister_filesystem(&fuse_fs_type); |
875d95ec9 [PATCH] fuse: fix... |
1602 |
unregister_fuseblk(); |
8c0a85377 fs: push rcu_barr... |
1603 1604 1605 1606 1607 1608 |
/* * Make sure all delayed rcu free inodes are flushed before we * destroy cache. */ rcu_barrier(); |
d8a5ba454 [PATCH] FUSE - core |
1609 1610 |
kmem_cache_destroy(fuse_inode_cachep); } |
5c89e17e9 kobject: convert ... |
1611 |
static struct kobject *fuse_kobj; |
5c89e17e9 kobject: convert ... |
1612 |
|
f543f253f [PATCH] fuse: mak... |
1613 1614 1615 |
static int fuse_sysfs_init(void) { int err; |
00d266662 kobject: convert ... |
1616 |
fuse_kobj = kobject_create_and_add("fuse", fs_kobj); |
5c89e17e9 kobject: convert ... |
1617 1618 |
if (!fuse_kobj) { err = -ENOMEM; |
f543f253f [PATCH] fuse: mak... |
1619 |
goto out_err; |
5c89e17e9 kobject: convert ... |
1620 |
} |
f543f253f [PATCH] fuse: mak... |
1621 |
|
f9bb48825 sysfs: Create mou... |
1622 1623 |
err = sysfs_create_mount_point(fuse_kobj, "connections"); if (err) |
f543f253f [PATCH] fuse: mak... |
1624 1625 1626 1627 1628 |
goto out_fuse_unregister; return 0; out_fuse_unregister: |
197b12d67 Kobject: convert ... |
1629 |
kobject_put(fuse_kobj); |
f543f253f [PATCH] fuse: mak... |
1630 1631 1632 1633 1634 1635 |
out_err: return err; } static void fuse_sysfs_cleanup(void) { |
f9bb48825 sysfs: Create mou... |
1636 |
sysfs_remove_mount_point(fuse_kobj, "connections"); |
197b12d67 Kobject: convert ... |
1637 |
kobject_put(fuse_kobj); |
f543f253f [PATCH] fuse: mak... |
1638 |
} |
d8a5ba454 [PATCH] FUSE - core |
1639 1640 1641 |
static int __init fuse_init(void) { int res; |
f2294482f fuse: convert pri... |
1642 1643 1644 |
pr_info("init (API version %i.%i) ", FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION); |
d8a5ba454 [PATCH] FUSE - core |
1645 |
|
bafa96541 [PATCH] fuse: add... |
1646 |
INIT_LIST_HEAD(&fuse_conn_list); |
d8a5ba454 [PATCH] FUSE - core |
1647 1648 1649 |
res = fuse_fs_init(); if (res) goto err; |
334f485df [PATCH] FUSE - de... |
1650 1651 1652 |
res = fuse_dev_init(); if (res) goto err_fs_cleanup; |
f543f253f [PATCH] fuse: mak... |
1653 1654 1655 |
res = fuse_sysfs_init(); if (res) goto err_dev_cleanup; |
bafa96541 [PATCH] fuse: add... |
1656 1657 1658 |
res = fuse_ctl_init(); if (res) goto err_sysfs_cleanup; |
487ea5af6 fuse: limit user-... |
1659 1660 |
sanitize_global_limit(&max_user_bgreq); sanitize_global_limit(&max_user_congthresh); |
d8a5ba454 [PATCH] FUSE - core |
1661 |
return 0; |
bafa96541 [PATCH] fuse: add... |
1662 1663 |
err_sysfs_cleanup: fuse_sysfs_cleanup(); |
f543f253f [PATCH] fuse: mak... |
1664 1665 |
err_dev_cleanup: fuse_dev_cleanup(); |
334f485df [PATCH] FUSE - de... |
1666 1667 |
err_fs_cleanup: fuse_fs_cleanup(); |
d8a5ba454 [PATCH] FUSE - core |
1668 1669 1670 1671 1672 1673 |
err: return res; } static void __exit fuse_exit(void) { |
f2294482f fuse: convert pri... |
1674 1675 |
pr_debug("exit "); |
d8a5ba454 [PATCH] FUSE - core |
1676 |
|
bafa96541 [PATCH] fuse: add... |
1677 |
fuse_ctl_cleanup(); |
f543f253f [PATCH] fuse: mak... |
1678 |
fuse_sysfs_cleanup(); |
d8a5ba454 [PATCH] FUSE - core |
1679 |
fuse_fs_cleanup(); |
334f485df [PATCH] FUSE - de... |
1680 |
fuse_dev_cleanup(); |
d8a5ba454 [PATCH] FUSE - core |
1681 1682 1683 1684 |
} module_init(fuse_init); module_exit(fuse_exit); |