diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-07-04 19:36:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-07-04 19:36:06 -0700 |
| commit | 1dc51b8288007753ad7cd7d08bb8fa930fc8bb10 (patch) | |
| tree | 0616c0ff7d877e64d9c248a6cdff074eae258840 /fs | |
| parent | 9b284cbdb5de3b8871014f8290d1b540e5181c21 (diff) | |
| parent | 0f1db7dee200127da4c07928189748918c312031 (diff) | |
| download | op-kernel-dev-1dc51b8288007753ad7cd7d08bb8fa930fc8bb10.zip op-kernel-dev-1dc51b8288007753ad7cd7d08bb8fa930fc8bb10.tar.gz | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull more vfs updates from Al Viro:
"Assorted VFS fixes and related cleanups (IMO the most interesting in
that part are f_path-related things and Eric's descriptor-related
stuff). UFS regression fixes (it got broken last cycle). 9P fixes.
fs-cache series, DAX patches, Jan's file_remove_suid() work"
[ I'd say this is much more than "fixes and related cleanups". The
file_table locking rule change by Eric Dumazet is a rather big and
fundamental update even if the patch isn't huge. - Linus ]
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (49 commits)
9p: cope with bogus responses from server in p9_client_{read,write}
p9_client_write(): avoid double p9_free_req()
9p: forgetting to cancel request on interrupted zero-copy RPC
dax: bdev_direct_access() may sleep
block: Add support for DAX reads/writes to block devices
dax: Use copy_from_iter_nocache
dax: Add block size note to documentation
fs/file.c: __fget() and dup2() atomicity rules
fs/file.c: don't acquire files->file_lock in fd_install()
fs:super:get_anon_bdev: fix race condition could cause dev exceed its upper limitation
vfs: avoid creation of inode number 0 in get_next_ino
namei: make set_root_rcu() return void
make simple_positive() public
ufs: use dir_pages instead of ufs_dir_pages()
pagemap.h: move dir_pages() over there
remove the pointless include of lglock.h
fs: cleanup slight list_entry abuse
xfs: Correctly lock inode when removing suid and file capabilities
fs: Call security_ops->inode_killpriv on truncate
fs: Provide function telling whether file_remove_privs() will do anything
...
Diffstat (limited to 'fs')
69 files changed, 657 insertions, 467 deletions
diff --git a/fs/affs/affs.h b/fs/affs/affs.h index cffe837..c69a87e 100644 --- a/fs/affs/affs.h +++ b/fs/affs/affs.h @@ -64,7 +64,7 @@ struct affs_inode_info { /* short cut to get to the affs specific inode data */ static inline struct affs_inode_info *AFFS_I(struct inode *inode) { - return list_entry(inode, struct affs_inode_info, vfs_inode); + return container_of(inode, struct affs_inode_info, vfs_inode); } /* diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h index 5b700ef..c37149b 100644 --- a/fs/autofs4/autofs_i.h +++ b/fs/autofs4/autofs_i.h @@ -238,11 +238,6 @@ static inline u64 autofs4_get_ino(struct autofs_sb_info *sbi) return d_inode(sbi->sb->s_root)->i_ino; } -static inline int simple_positive(struct dentry *dentry) -{ - return d_really_is_positive(dentry) && !d_unhashed(dentry); -} - static inline void __autofs4_add_expiring(struct dentry *dentry) { struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); diff --git a/fs/befs/befs.h b/fs/befs/befs.h index 1fead8d..35d19e8 100644 --- a/fs/befs/befs.h +++ b/fs/befs/befs.h @@ -112,7 +112,7 @@ BEFS_SB(const struct super_block *super) static inline struct befs_inode_info * BEFS_I(const struct inode *inode) { - return list_entry(inode, struct befs_inode_info, vfs_inode); + return container_of(inode, struct befs_inode_info, vfs_inode); } static inline befs_blocknr_t diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index cd46e41..6b65996 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1530,7 +1530,7 @@ static int fill_files_note(struct memelfnote *note) file = vma->vm_file; if (!file) continue; - filename = d_path(&file->f_path, name_curpos, remaining); + filename = file_path(file, name_curpos, remaining); if (IS_ERR(filename)) { if (PTR_ERR(filename) == -ENAMETOOLONG) { vfree(data); @@ -1540,7 +1540,7 @@ static int fill_files_note(struct memelfnote *note) continue; } - /* d_path() fills at the end, move name down */ + /* file_path() fills at the end, move name down */ /* n = strlen(filename) + 1: */ n = (name_curpos + remaining) - filename; remaining = filename - name_curpos; diff --git a/fs/block_dev.c b/fs/block_dev.c index 4fe10f9..1982437 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -152,6 +152,9 @@ blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset) struct file *file = iocb->ki_filp; struct inode *inode = file->f_mapping->host; + if (IS_DAX(inode)) + return dax_do_io(iocb, inode, iter, offset, blkdev_get_block, + NULL, DIO_SKIP_DIO_COUNT); return __blockdev_direct_IO(iocb, inode, I_BDEV(inode), iter, offset, blkdev_get_block, NULL, NULL, DIO_SKIP_DIO_COUNT); @@ -443,6 +446,12 @@ long bdev_direct_access(struct block_device *bdev, sector_t sector, long avail; const struct block_device_operations *ops = bdev->bd_disk->fops; + /* + * The device driver is allowed to sleep, in order to make the + * memory directly accessible. + */ + might_sleep(); + if (size < 0) return size; if (!ops->direct_access) @@ -1170,6 +1179,7 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part) bdev->bd_disk = disk; bdev->bd_queue = disk->queue; bdev->bd_contains = bdev; + bdev->bd_inode->i_flags = disk->fops->direct_access ? S_DAX : 0; if (!partno) { ret = -ENXIO; bdev->bd_part = disk_get_part(disk, partno); diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 795d754..b823fac9 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1748,7 +1748,7 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb, } current->backing_dev_info = inode_to_bdi(inode); - err = file_remove_suid(file); + err = file_remove_privs(file); if (err) { mutex_unlock(&inode->i_mutex); goto out; diff --git a/fs/cachefiles/internal.h b/fs/cachefiles/internal.h index 8c52472..aecd085 100644 --- a/fs/cachefiles/internal.h +++ b/fs/cachefiles/internal.h @@ -43,7 +43,6 @@ struct cachefiles_object { loff_t i_size; /* object size */ unsigned long flags; #define CACHEFILES_OBJECT_ACTIVE 0 /* T if marked active */ -#define CACHEFILES_OBJECT_BURIED 1 /* T if preemptively buried */ atomic_t usage; /* object usage count */ uint8_t type; /* object type */ uint8_t new; /* T if object new */ diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c index ab857ab..fc1056f 100644 --- a/fs/cachefiles/namei.c +++ b/fs/cachefiles/namei.c @@ -97,7 +97,8 @@ static noinline void cachefiles_printk_object(struct cachefiles_object *object, * call vfs_unlink(), vfs_rmdir() or vfs_rename() */ static void cachefiles_mark_object_buried(struct cachefiles_cache *cache, - struct dentry *dentry) + struct dentry *dentry, + enum fscache_why_object_killed why) { struct cachefiles_object *object; struct rb_node *p; @@ -132,8 +133,9 @@ found_dentry: pr_err("\n"); pr_err("Error: Can't preemptively bury live object\n"); cachefiles_printk_object(object, NULL); - } else if (test_and_set_bit(CACHEFILES_OBJECT_BURIED, &object->flags)) { - pr_err("Error: Object already preemptively buried\n"); + } else { + if (why != FSCACHE_OBJECT_IS_STALE) + fscache_object_mark_killed(&object->fscache, why); } write_unlock(&cache->active_lock); @@ -265,7 +267,8 @@ requeue: static int cachefiles_bury_object(struct cachefiles_cache *cache, struct dentry *dir, struct dentry *rep, - bool preemptive) + bool preemptive, + enum fscache_why_object_killed why) { struct dentry *grave, *trap; struct path path, path_to_graveyard; @@ -289,7 +292,7 @@ static int cachefiles_bury_object(struct cachefiles_cache *cache, ret = vfs_unlink(d_inode(dir), rep, NULL); if (preemptive) - cachefiles_mark_object_buried(cache, rep); + cachefiles_mark_object_buried(cache, rep, why); } mutex_unlock(&d_inode(dir)->i_mutex); @@ -394,7 +397,7 @@ try_again: "Rename failed with error %d", ret); if (preemptive) - cachefiles_mark_object_buried(cache, rep); + cachefiles_mark_object_buried(cache, rep, why); } unlock_rename(cache->graveyard, dir); @@ -422,7 +425,7 @@ int cachefiles_delete_object(struct cachefiles_cache *cache, mutex_lock_nested(&d_inode(dir)->i_mutex, I_MUTEX_PARENT); - if (test_bit(CACHEFILES_OBJECT_BURIED, &object->flags)) { + if (test_bit(FSCACHE_OBJECT_KILLED_BY_CACHE, &object->fscache.flags)) { /* object allocation for the same key preemptively deleted this * object's file so that it could create its own file */ _debug("object preemptively buried"); @@ -433,7 +436,8 @@ int cachefiles_delete_object(struct cachefiles_cache *cache, * may have been renamed */ if (dir == object->dentry->d_parent) { ret = cachefiles_bury_object(cache, dir, - object->dentry, false); + object->dentry, false, + FSCACHE_OBJECT_WAS_RETIRED); } else { /* it got moved, presumably by cachefilesd culling it, * so it's no longer in the key path and we can ignore @@ -522,7 +526,7 @@ lookup_again: if (d_is_negative(next)) { ret = cachefiles_has_space(cache, 1, 0); if (ret < 0) - goto create_error; + goto no_space_error; path.dentry = dir; ret = security_path_mkdir(&path, next, 0); @@ -551,7 +555,7 @@ lookup_again: if (d_is_negative(next)) { ret = cachefiles_has_space(cache, 1, 0); if (ret < 0) - goto create_error; + goto no_space_error; path.dentry = dir; ret = security_path_mknod(&path, next, S_IFREG, 0); @@ -602,7 +606,8 @@ lookup_again: * mutex) */ object->dentry = NULL; - ret = cachefiles_bury_object(cache, dir, next, true); + ret = cachefiles_bury_object(cache, dir, next, true, + FSCACHE_OBJECT_IS_STALE); dput(next); next = NULL; @@ -610,6 +615,7 @@ lookup_again: goto delete_error; _debug("redo lookup"); + fscache_object_retrying_stale(&object->fscache); goto lookup_again; } } @@ -662,6 +668,8 @@ lookup_again: _leave(" = 0 [%lu]", d_backing_inode(object->dentry)->i_ino); return 0; +no_space_error: + fscache_object_mark_killed(&object->fscache, FSCACHE_OBJECT_NO_SPACE); create_error: _debug("create error %d", ret); if (ret == -EIO) @@ -927,7 +935,8 @@ int cachefiles_cull(struct cachefiles_cache *cache, struct dentry *dir, /* actually remove the victim (drops the dir mutex) */ _debug("bury"); - ret = cachefiles_bury_object(cache, dir, victim, false); + ret = cachefiles_bury_object(cache, dir, victim, false, + FSCACHE_OBJECT_WAS_CULLED); if (ret < 0) goto error; diff --git a/fs/ceph/file.c b/fs/ceph/file.c index faf9209..8b79d87 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -962,7 +962,7 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from) pos = iocb->ki_pos; count = iov_iter_count(from); - err = file_remove_suid(file); + err = file_remove_privs(file); if (err) goto out; diff --git a/fs/coda/coda_linux.h b/fs/coda/coda_linux.h index d6f7a76..f829fe9 100644 --- a/fs/coda/coda_linux.h +++ b/fs/coda/coda_linux.h @@ -79,7 +79,7 @@ void coda_sysctl_clean(void); static inline struct coda_inode_info *ITOC(struct inode *inode) { - return list_entry(inode, struct coda_inode_info, vfs_inode); + return container_of(inode, struct coda_inode_info, vfs_inode); } static __inline__ struct CodaFid *coda_i2f(struct inode *inode) diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c index 8d89f5f..eae8757 100644 --- a/fs/configfs/inode.c +++ b/fs/configfs/inode.c @@ -236,7 +236,7 @@ void configfs_drop_dentry(struct configfs_dirent * sd, struct dentry * parent) if (dentry) { spin_lock(&dentry->d_lock); - if (!d_unhashed(dentry) && d_really_is_positive(dentry)) { + if (simple_positive(dentry)) { dget_dlock(dentry); __d_drop(dentry); spin_unlock(&dentry->d_lock); diff --git a/fs/coredump.c b/fs/coredump.c index e52e006..c5ecde6 100644 --- a/fs/coredump.c +++ b/fs/coredump.c @@ -140,7 +140,7 @@ static int cn_print_exe_file(struct core_name *cn) goto put_exe_file; } - path = d_path(&exe_file->f_path, pathbuf, PATH_MAX); + path = file_path(exe_file, pathbuf, PATH_MAX); if (IS_ERR(path)) { ret = PTR_ERR(path); goto free_buf; @@ -155,7 +155,7 @@ static ssize_t dax_io(struct inode *inode, struct iov_iter *iter, } if (iov_iter_rw(iter) == WRITE) - len = copy_from_iter(addr, max - pos, iter); + len = copy_from_iter_nocache(addr, max - pos, iter); else if (!hole) len = copy_to_iter(addr, max - pos, iter); else @@ -209,7 +209,8 @@ ssize_t dax_do_io(struct kiocb *iocb, struct inode *inode, } /* Protects against truncate */ - inode_dio_begin(inode); + if (!(flags & DIO_SKIP_DIO_COUNT)) + inode_dio_begin(inode); retval = dax_io(inode, iter, pos, end, get_block, &bh); @@ -219,7 +220,8 @@ ssize_t dax_do_io(struct kiocb *iocb, struct inode *inode, if ((retval > 0) && end_io) end_io(iocb, pos, retval, bh.b_private); - inode_dio_end(inode); + if (!(flags & DIO_SKIP_DIO_COUNT)) + inode_dio_end(inode); out: return retval; } diff --git a/fs/dcache.c b/fs/dcache.c index 910968b..7a3f3e5 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -1673,7 +1673,8 @@ void d_set_d_op(struct dentry *dentry, const struct dentry_operations *op) DCACHE_OP_COMPARE | DCACHE_OP_REVALIDATE | DCACHE_OP_WEAK_REVALIDATE | - DCACHE_OP_DELETE )); + DCACHE_OP_DELETE | + DCACHE_OP_SELECT_INODE)); dentry->d_op = op; if (!op) return; @@ -1689,6 +1690,8 @@ void d_set_d_op(struct dentry *dentry, const struct dentry_operations *op) dentry->d_flags |= DCACHE_OP_DELETE; if (op->d_prune) dentry->d_flags |= DCACHE_OP_PRUNE; + if (op->d_select_inode) + dentry->d_flags |= DCACHE_OP_SELECT_INODE; } EXPORT_SYMBOL(d_set_d_op); diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c index d6d1cf0..c711be8 100644 --- a/fs/debugfs/inode.c +++ b/fs/debugfs/inode.c @@ -44,11 +44,6 @@ static struct inode *debugfs_get_inode(struct super_block *sb) return inode; } -static inline int debugfs_positive(struct dentry *dentry) -{ - return d_really_is_positive(dentry) && !d_unhashed(dentry); -} - struct debugfs_mount_opts { kuid_t uid; kgid_t gid; @@ -522,7 +517,7 @@ static int __debugfs_remove(struct dentry *dentry, struct dentry *parent) { int ret = 0; - if (debugfs_positive(dentry)) { + if (simple_positive(dentry)) { dget(dentry); if (d_is_dir(dentry)) ret = simple_rmdir(d_inode(parent), dentry); @@ -602,7 +597,7 @@ void debugfs_remove_recursive(struct dentry *dentry) */ spin_lock(&parent->d_lock); list_for_each_entry(child, &parent->d_subdirs, d_child) { - if (!debugfs_positive(child)) + if (!simple_positive(child)) continue; /* perhaps simple_empty(child) makes more sense */ @@ -623,7 +618,7 @@ void debugfs_remove_recursive(struct dentry *dentry) * from d_subdirs. When releasing the parent->d_lock we can * no longer trust that the next pointer is valid. * Restart the loop. We'll skip this one with the - * debugfs_positive() check. + * simple_positive() check. */ goto loop; } diff --git a/fs/exofs/dir.c b/fs/exofs/dir.c index 4deb0b0..e5bb2ab 100644 --- a/fs/exofs/dir.c +++ b/fs/exofs/dir.c @@ -44,12 +44,6 @@ static inline void exofs_put_page(struct page *page) page_cache_release(page); } -/* Accesses dir's inode->i_size must be called under inode lock */ -static inline unsigned long dir_pages(struct inode *inode) -{ - return (inode->i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; -} - static unsigned exofs_last_byte(struct inode *inode, unsigned long page_nr) { loff_t last_byte = inode->i_size; diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c index 796b491..0c6638b 100644 --- a/fs/ext2/dir.c +++ b/fs/ext2/dir.c @@ -70,11 +70,6 @@ static inline void ext2_put_page(struct page *page) page_cache_release(page); } -static inline unsigned long dir_pages(struct inode *inode) -{ - return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT; -} - /* * Return the offset into page `page_nr' of the last valid * byte in that page, plus one. diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 5c78764..58987b5 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -452,7 +452,7 @@ void __ext4_error_file(struct file *file, const char *function, es = EXT4_SB(inode->i_sb)->s_es; es->s_last_error_ino = cpu_to_le32(inode->i_ino); if (ext4_error_ratelimit(inode->i_sb)) { - path = d_path(&(file->f_path), pathname, sizeof(pathname)); + path = file_path(file, pathname, sizeof(pathname)); if (IS_ERR(path)) path = "(unknown)"; va_start(args, fmt); @@ -147,6 +147,13 @@ static int expand_fdtable(struct files_struct *files, int nr) spin_unlock(&files->file_lock); new_fdt = alloc_fdtable(nr); + + /* make sure all __fd_install() have seen resize_in_progress + * or have finished their rcu_read_lock_sched() section. + */ + if (atomic_read(&files->count) > 1) + synchronize_sched(); + spin_lock(&files->file_lock); if (!new_fdt) return -ENOMEM; @@ -158,21 +165,14 @@ static int expand_fdtable(struct files_struct *files, int nr) __free_fdtable(new_fdt); return -EMFILE; } - /* - * Check again since another task may have expanded the fd table while - * we dropped the lock - */ cur_fdt = files_fdtable(files); - if (nr >= cur_fdt->max_fds) { - /* Continue as planned */ - copy_fdtable(new_fdt, cur_fdt); - rcu_assign_pointer(files->fdt, new_fdt); - if (cur_fdt != &files->fdtab) - call_rcu(&cur_fdt->rcu, free_fdtable_rcu); - } else { - /* Somebody else expanded, so undo our attempt */ - __free_fdtable(new_fdt); - } + BUG_ON(nr < cur_fdt->max_fds); + copy_fdtable(new_fdt, cur_fdt); + rcu_assign_pointer(files->fdt, new_fdt); + if (cur_fdt != &files->fdtab) + call_rcu(&cur_fdt->rcu, free_fdtable_rcu); + /* coupled with smp_rmb() in __fd_install() */ + smp_wmb(); return 1; } @@ -185,21 +185,38 @@ static int expand_fdtable(struct files_struct *files, int nr) * The files->file_lock should be held on entry, and will be held on exit. */ static int expand_files(struct files_struct *files, int nr) + __releases(files->file_lock) + __acquires(files->file_lock) { struct fdtable *fdt; + int expanded = 0; +repeat: fdt = files_fdtable(files); /* Do we need to expand? */ if (nr < fdt->max_fds) - return 0; + return expanded; /* Can we expand? */ if (nr >= sysctl_nr_open) return -EMFILE; + if (unlikely(files->resize_in_progress)) { + spin_unlock(&files->file_lock); + expanded = 1; + wait_event(files->resize_wait, !files->resize_in_progress); + spin_lock(&files->file_lock); + goto repeat; + } + /* All good, so we try */ - return expand_fdtable(files, nr); + files->resize_in_progress = true; + expanded = expand_fdtable(files, nr); + files->resize_in_progress = false; + + wake_up_all(&files->resize_wait); + return expanded; } static inline void __set_close_on_exec(int fd, struct fdtable *fdt) @@ -256,6 +273,8 @@ struct files_struct *dup_fd(struct files_struct *oldf, int *errorp) atomic_set(&newf->count, 1); spin_lock_init(&newf->file_lock); + newf->resize_in_progress = false; + init_waitqueue_head(&newf->resize_wait); newf->next_fd = 0; new_fdt = &newf->fdtab; new_fdt->max_fds = NR_OPEN_DEFAULT; @@ -553,11 +572,21 @@ void __fd_install(struct files_struct *files, unsigned int fd, struct file *file) { struct fdtable *fdt; - spin_lock(&files->file_lock); - fdt = files_fdtable(files); + + might_sleep(); + rcu_read_lock_sched(); + + while (unlikely(files->resize_in_progress)) { + rcu_read_unlock_sched(); + wait_event(files->resize_wait, !files->resize_in_progress); + rcu_read_lock_sched(); + } + /* coupled with smp_wmb() in expand_fdtable() */ + smp_rmb(); + fdt = rcu_dereference_sched(files->fdt); BUG_ON(fdt->fd[fd] != NULL); rcu_assign_pointer(fdt->fd[fd], file); - spin_unlock(&files->file_lock); + rcu_read_unlock_sched(); } void fd_install(unsigned int fd, struct file *file) @@ -635,11 +664,17 @@ static struct file *__fget(unsigned int fd, fmode_t mask) struct file *file; rcu_read_lock(); +loop: file = fcheck_files(files, fd); if (file) { - /* File object ref couldn't be taken */ - if ((file->f_mode & mask) || !get_file_rcu(file)) + /* File object ref couldn't be taken. + * dup2() atomicity guarantee is the reason + * we loop to catch the new file (or NULL pointer) + */ + if (file->f_mode & mask) file = NULL; + else if (!get_file_rcu(file)) + goto loop; } rcu_read_unlock(); diff --git a/fs/file_table.c b/fs/file_table.c index 294174d..7f9d407 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -20,7 +20,6 @@ #include <linux/cdev.h> #include <linux/fsnotify.h> #include <linux/sysctl.h> -#include <linux/lglock.h> #include <linux/percpu_counter.h> #include <linux/percpu.h> #include <linux/hardirq.h> diff --git a/fs/freevxfs/vxfs_lookup.c b/fs/freevxfs/vxfs_lookup.c index 99c7f0a..484b32d 100644 --- a/fs/freevxfs/vxfs_lookup.c +++ b/fs/freevxfs/vxfs_lookup.c @@ -61,13 +61,6 @@ const struct file_operations vxfs_dir_operations = { .iterate = vxfs_readdir, }; - -static inline u_long -dir_pages(struct inode *inode) -{ - return (inode->i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; -} - static inline u_long dir_blocks(struct inode *ip) { diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c index 89acec7..d403c69 100644 --- a/fs/fscache/cookie.c +++ b/fs/fscache/cookie.c @@ -327,7 +327,8 @@ static int fscache_alloc_object(struct fscache_cache *cache, object_already_extant: ret = -ENOBUFS; - if (fscache_object_is_dead(object)) { + if (fscache_object_is_dying(object) || + fscache_cache_is_broken(object)) { spin_unlock(&cookie->lock); goto error; } @@ -671,7 +672,7 @@ int __fscache_check_consistency(struct fscache_cookie *cookie) if (!op) return -ENOMEM; - fscache_operation_init(op, NULL, NULL); + fscache_operation_init(op, NULL, NULL, NULL); op->flags = FSCACHE_OP_MYTHREAD | (1 << FSCACHE_OP_WAITING) | (1 << FSCACHE_OP_UNUSE_COOKIE); @@ -695,8 +696,7 @@ int __fscache_check_consistency(struct fscache_cookie *cookie) /* the work queue now carries its own ref on the object */ spin_unlock(&cookie->lock); - ret = fscache_wait_for_operation_activation(object, op, - NULL, NULL, NULL); + ret = fscache_wait_for_operation_activation(object, op, NULL, NULL); if (ret == 0) { /* ask the cache to honour the operation */ ret = object->cache->ops->check_consistency(op); diff --git a/fs/fscache/internal.h b/fs/fscache/internal.h index 7872a62..97ec451 100644 --- a/fs/fscache/internal.h +++ b/fs/fscache/internal.h @@ -124,8 +124,7 @@ extern int fscache_submit_exclusive_op(struct fscache_object *, struct fscache_operation *); extern int fscache_submit_op(struct fscache_object *, struct fscache_operation *); -extern int fscache_cancel_op(struct fscache_operation *, - void (*)(struct fscache_operation *)); +extern int fscache_cancel_op(struct fscache_operation *, bool); extern void fscache_cancel_all_ops(struct fscache_object *); extern void fscache_abort_object(struct fscache_object *); extern void fscache_start_operations(struct fscache_object *); @@ -138,8 +137,7 @@ extern int fscache_wait_for_deferred_lookup(struct fscache_cookie *); extern int fscache_wait_for_operation_activation(struct fscache_object *, struct fscache_operation *, atomic_t *, - atomic_t *, - void (*)(struct fscache_operation *)); + atomic_t *); extern void fscache_invalidate_writes(struct fscache_cookie *); /* @@ -164,6 +162,7 @@ extern atomic_t fscache_n_op_pend; extern atomic_t fscache_n_op_run; extern atomic_t fscache_n_op_enqueue; extern atomic_t fscache_n_op_deferred_release; +extern atomic_t fscache_n_op_initialised; extern atomic_t fscache_n_op_release; extern atomic_t fscache_n_op_gc; extern atomic_t fscache_n_op_cancelled; @@ -271,6 +270,11 @@ extern atomic_t fscache_n_cop_write_page; extern atomic_t fscache_n_cop_uncache_page; extern atomic_t fscache_n_cop_dissociate_pages; +extern atomic_t fscache_n_cache_no_space_reject; +extern atomic_t fscache_n_cache_stale_objects; +extern atomic_t fscache_n_cache_retired_objects; +extern atomic_t fscache_n_cache_culled_objects; + static inline void fscache_stat(atomic_t *stat) { atomic_inc(stat); diff --git a/fs/fscache/object.c b/fs/fscache/object.c index da032da..9e792e3 100644 --- a/fs/fscache/object.c +++ b/fs/fscache/object.c @@ -328,6 +328,17 @@ void fscache_object_init(struct fscache_object *object, EXPORT_SYMBOL(fscache_object_init); /* + * Mark the object as no longer being live, making sure that we synchronise + * against op submission. + */ +static inline void fscache_mark_object_dead(struct fscache_object *object) +{ + spin_lock(&object->lock); + clear_bit(FSCACHE_OBJECT_IS_LIVE, &object->flags); + spin_unlock(&object->lock); +} + +/* * Abort object initialisation before we start it. */ static const struct fscache_state *fscache_abort_initialisation(struct fscache_object *object, @@ -610,6 +621,8 @@ static const struct fscache_state *fscache_lookup_failure(struct fscache_object object->cache->ops->lookup_complete(object); fscache_stat_d(&fscache_n_cop_lookup_complete); + set_bit(FSCACHE_OBJECT_KILLED_BY_CACHE, &object->flags); + cookie = object->cookie; set_bit(FSCACHE_COOKIE_UNAVAILABLE, &cookie->flags); if (test_and_clear_bit(FSCACHE_COOKIE_LOOKING_UP, &cookie->flags)) @@ -629,7 +642,7 @@ static const struct fscache_state *fscache_kill_object(struct fscache_object *ob _enter("{OBJ%x,%d,%d},%d", object->debug_id, object->n_ops, object->n_children, event); - clear_bit(FSCACHE_OBJECT_IS_LIVE, &object->flags); + fscache_mark_object_dead(object); object->oob_event_mask = 0; if (list_empty(&object->dependents) && @@ -948,7 +961,8 @@ static const struct fscache_state *_fscache_invalidate_object(struct fscache_obj if (!op) goto nomem; - fscache_operation_init(op, object->cache->ops->invalidate_object, NULL); + fscache_operation_init(op, object->cache->ops->invalidate_object, + NULL, NULL); op->flags = FSCACHE_OP_ASYNC | (1 << FSCACHE_OP_EXCLUSIVE) | (1 << FSCACHE_OP_UNUSE_COOKIE); @@ -974,13 +988,13 @@ static const struct fscache_state *_fscache_invalidate_object(struct fscache_obj return transit_to(UPDATE_OBJECT); nomem: - clear_bit(FSCACHE_OBJECT_IS_LIVE, &object->flags); + fscache_mark_object_dead(object); fscache_unuse_cookie(object); _leave(" [ENOMEM]"); return transit_to(KILL_OBJECT); submit_op_failed: - clear_bit(FSCACHE_OBJECT_IS_LIVE, &object->flags); + fscache_mark_object_dead(object); spin_unlock(&cookie->lock); fscache_unuse_cookie(object); kfree(op); @@ -1016,3 +1030,50 @@ static const struct fscache_state *fscache_update_object(struct fscache_object * _leave(""); return transit_to(WAIT_FOR_CMD); } + +/** + * fscache_object_retrying_stale - Note retrying stale object + * @object: The object that will be retried + * + * Note that an object lookup found an on-disk object that was adjudged to be + * stale and has been deleted. The lookup will be retried. + */ +void fscache_object_retrying_stale(struct fscache_object *object) +{ + fscache_stat(&fscache_n_cache_no_space_reject); +} +EXPORT_SYMBOL(fscache_object_retrying_stale); + +/** + * fscache_object_mark_killed - Note that an object was killed + * @object: The object that was culled + * @why: The reason the object was killed. + * + * Note that an object was killed. Returns true if the object was + * already marked killed, false if it wasn't. + */ +void fscache_object_mark_killed(struct fscache_object *object, + enum fscache_why_object_killed why) +{ + if (test_and_set_bit(FSCACHE_OBJECT_KILLED_BY_CACHE, &object->flags)) { + pr_err("Error: Object already killed by cache [%s]\n", + object->cache->identifier); + return; + } + + switch (why) { + case FSCACHE_OBJECT_NO_SPACE: + fscache_stat(&fscache_n_cache_no_space_reject); + break; + case FSCACHE_OBJECT_IS_STALE: + fscache_stat(&fscache_n_cache_stale_objects); + break; + case FSCACHE_OBJECT_WAS_RETIRED: + fscache_stat(&fscache_n_cache_retired_objects); + break; + case FSCACHE_OBJECT_WAS_CULLED: + fscache_stat(&fscache_n_cache_culled_objects); + break; + } +} +EXPORT_SYMBOL(fscache_object_mark_killed); diff --git a/fs/fscache/operation.c b/fs/fscache/operation.c index e7b87a0..de67745 100644 --- a/fs/fscache/operation.c +++ b/fs/fscache/operation.c @@ -20,6 +20,35 @@ atomic_t fscache_op_debug_id; EXPORT_SYMBOL(fscache_op_debug_id); +static void fscache_operation_dummy_cancel(struct fscache_operation *op) +{ +} + +/** + * fscache_operation_init - Do basic initialisation of an operation + * @op: The operation to initialise + * @release: The release function to assign + * + * Do basic initialisation of an operation. The caller must still set flags, + * object and processor if needed. + */ +void fscache_operation_init(struct fscache_operation *op, + fscache_operation_processor_t processor, + fscache_operation_cancel_t cancel, + fscache_operation_release_t release) +{ + INIT_WORK(&op->work, fscache_op_work_func); + atomic_set(&op->usage, 1); + op->state = FSCACHE_OP_ST_INITIALISED; + op->debug_id = atomic_inc_return(&fscache_op_debug_id); + op->processor = processor; + op->cancel = cancel ?: fscache_operation_dummy_cancel; + op->release = release; + INIT_LIST_HEAD(&op->pend_link); + fscache_stat(&fscache_n_op_initialised); +} +EXPORT_SYMBOL(fscache_operation_init); + /** * fscache_enqueue_operation - Enqueue an operation for processing * @op: The operation to enqueue @@ -76,6 +105,43 @@ static void fscache_run_op(struct fscache_object *object, } /* + * report an unexpected submission + */ +static void fscache_report_unexpected_submission(struct fscache_object *object, + struct fscache_operation *op, + const struct fscache_state *ostate) +{ + static bool once_only; + struct fscache_operation *p; + unsigned n; + + if (once_only) + return; + once_only = true; + + kdebug("unexpected submission OP%x [OBJ%x %s]", + op->debug_id, object->debug_id, object->state->name); + kdebug("objstate=%s [%s]", object->state->name, ostate->name); + kdebug("objflags=%lx", object->flags); + kdebug("objevent=%lx [%lx]", object->events, object->event_mask); + kdebug("ops=%u inp=%u exc=%u", + object->n_ops, object->n_in_progress, object->n_exclusive); + + if (!list_empty(&object->pending_ops)) { + n = 0; + list_for_each_entry(p, &object->pending_ops, pend_link) { + ASSERTCMP(p->object, ==, object); + kdebug("%p %p", op->processor, op->release); + n++; + } + + kdebug("n=%u", n); + } + + dump_stack(); +} + +/* * submit an exclusive operation for an object * - other ops are excluded from running simultaneously with this one * - this gets any extra refs it needs on an op @@ -83,6 +149,8 @@ static void fscache_run_op(struct fscache_object *object, int fscache_submit_exclusive_op(struct fscache_object *object, struct fscache_operation *op) { + const struct fscache_state *ostate; + unsigned long flags; int ret; _enter("{OBJ%x OP%x},", object->debug_id, op->debug_id); @@ -95,8 +163,21 @@ int fscache_submit_exclusive_op(struct fscache_object *object, ASSERTCMP(object->n_ops, >=, object->n_exclusive); ASSERT(list_empty(&op->pend_link)); + ostate = object->state; + smp_rmb(); + op->state = FSCACHE_OP_ST_PENDING; - if (fscache_object_is_active(object)) { + flags = READ_ONCE(object->flags); + if (unlikely(!(flags & BIT(FSCACHE_OBJECT_IS_LIVE)))) { + fscache_stat(&fscache_n_op_rejected); + op->cancel(op); + op->state = FSCACHE_OP_ST_CANCELLED; + ret = -ENOBUFS; + } else if (unlikely(fscache_cache_is_broken(object))) { + op->cancel(op); + op->state = FSCACHE_OP_ST_CANCELLED; + ret = -EIO; + } else if (flags & BIT(FSCACHE_OBJECT_IS_AVAILABLE)) { op->object = object; object->n_ops++; object->n_exclusive++; /* reads and writes must wait */ @@ -118,7 +199,7 @@ int fscache_submit_exclusive_op(struct fscache_object *object, /* need to issue a new write op after this */ clear_bit(FSCACHE_OBJECT_PENDING_WRITE, &object->flags); ret = 0; - } else if (test_bit(FSCACHE_OBJECT_IS_LOOKED_UP, &object->flags)) { + } else if (flags & BIT(FSCACHE_OBJECT_IS_LOOKED_UP)) { op->object = object; object->n_ops++; object->n_exclusive++; /* reads and writes must wait */ @@ -126,12 +207,15 @@ int fscache_submit_exclusive_op(struct fscache_object *object, list_add_tail(&op->pend_link, &object->pending_ops); fscache_stat(&fscache_n_op_pend); ret = 0; + } else if (flags & BIT(FSCACHE_OBJECT_KILLED_BY_CACHE)) { + op->cancel(op); + op->state = FSCACHE_OP_ST_CANCELLED; + ret = -ENOBUFS; } else { - /* If we're in any other state, there must have been an I/O - * error of some nature. - */ - ASSERT(test_bit(FSCACHE_IOERROR, &object->cache->flags)); - ret = -EIO; + fscache_report_unexpected_submission(object, op, ostate); + op->cancel(op); + op->state = FSCACHE_OP_ST_CANCELLED; + ret = -ENOBUFS; } spin_unlock(&object->lock); @@ -139,43 +223,6 @@ int fscache_submit_exclusive_op(struct fscache_object *object, } /* - * report an unexpected submission - */ -static void fscache_report_unexpected_submission(struct fscache_object *object, - struct fscache_operation *op, - const struct fscache_state *ostate) -{ - static bool once_only; - struct fscache_operation *p; - unsigned n; - - if (once_only) - return; - once_only = true; - - kdebug("unexpected submission OP%x [OBJ%x %s]", - op->debug_id, object->debug_id, object->state->name); - kdebug("objstate=%s [%s]", object->state->name, ostate->name); - kdebug("objflags=%lx", object->flags); - kdebug("objevent=%lx [%lx]", object->events, object->event_mask); - kdebug("ops=%u inp=%u exc=%u", - object->n_ops, object->n_in_progress, object->n_exclusive); - - if (!list_empty(&object->pending_ops)) { - n = 0; - list_for_each_entry(p, &object->pending_ops, pend_link) { - ASSERTCMP(p->object, ==, object); - kdebug("%p %p", op->processor, op->release); - n++; - } - - kdebug("n=%u", n); - } - - dump_stack(); -} - -/* * submit an operation for an object * - objects may be submitted only in the following states: * - during object creation (write ops may be submitted) @@ -187,6 +234,7 @@ int fscache_submit_op(struct fscache_object *object, struct fscache_operation *op) { const struct fscache_state *ostate; + unsigned long flags; int ret; _enter("{OBJ%x OP%x},{%u}", @@ -204,7 +252,17 @@ int fscache_submit_op(struct fscache_object *object, smp_rmb(); op->state = FSCACHE_OP_ST_PENDING; - if (fscache_object_is_active(object)) { + flags = READ_ONCE(object->flags); + if (unlikely(!(flags & BIT(FSCACHE_OBJECT_IS_LIVE)))) { + fscache_stat(&fscache_n_op_rejected); + op->cancel(op); + op->state = FSCACHE_OP_ST_CANCELLED; + ret = -ENOBUFS; + } else if (unlikely(fscache_cache_is_broken(object))) { + op->cancel(op); + op->state = FSCACHE_OP_ST_CANCELLED; + ret = -EIO; + } else if (flags & BIT(FSCACHE_OBJECT_IS_AVAILABLE)) { op->object = object; object->n_ops++; @@ -222,23 +280,21 @@ int fscache_submit_op(struct fscache_object *object, fscache_run_op(object, op); } ret = 0; - } else if (test_bit(FSCACHE_OBJECT_IS_LOOKED_UP, &object->flags)) { + } else if (flags & BIT(FSCACHE_OBJECT_IS_LOOKED_UP)) { op->object = object; object->n_ops++; atomic_inc(&op->usage); list_add_tail(&op->pend_link, &object->pending_ops); fscache_stat(&fscache_n_op_pend); ret = 0; - } else if (fscache_object_is_dying(object)) { - fscache_stat(&fscache_n_op_rejected); + } else if (flags & BIT(FSCACHE_OBJECT_KILLED_BY_CACHE)) { + op->cancel(op); op->state = FSCACHE_OP_ST_CANCELLED; ret = -ENOBUFS; - } else if (!test_bit(FSCACHE_IOERROR, &object->cache->flags)) { + } else { fscache_report_unexpected_submission(object, op, ostate); ASSERT(!fscache_object_is_active(object)); - op->state = FSCACHE_OP_ST_CANCELLED; - ret = -ENOBUFS; - } else { + op->cancel(op); op->state = FSCACHE_OP_ST_CANCELLED; ret = -ENOBUFS; } @@ -293,9 +349,10 @@ void fscache_start_operations(struct fscache_object *object) * cancel an operation that's pending on an object */ int fscache_cancel_op(struct fscache_operation *op, - void (*do_cancel)(struct fscache_operation *)) + bool cancel_in_progress_op) { struct fscache_object *object = op->object; + bool put = false; int ret; _enter("OBJ%x OP%x}", op->object->debug_id, op->debug_id); @@ -309,19 +366,37 @@ int fscache_cancel_op(struct fscache_operation *op, ret = -EBUSY; if (op->state == FSCACHE_OP_ST_PENDING) { ASSERT(!list_empty(&op->pend_link)); - fscache_stat(&fscache_n_op_cancelled); list_del_init(&op->pend_link); - if (do_cancel) - do_cancel(op); + put = true; + + fscache_stat(&fscache_n_op_cancelled); + op->cancel(op); + op->state = FSCACHE_OP_ST_CANCELLED; + if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags)) + object->n_exclusive--; + if (test_and_clear_bit(FSCACHE_OP_WAITING, &op->flags)) + wake_up_bit(&op->flags, FSCACHE_OP_WAITING); + ret = 0; + } else if (op->state == FSCACHE_OP_ST_IN_PROGRESS && cancel_in_progress_op) { + ASSERTCMP(object->n_in_progress, >, 0); + if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags)) + object->n_exclusive--; + object->n_in_progress--; + if (object->n_in_progress == 0) + fscache_start_operations(object); + + fscache_stat(&fscache_n_op_cancelled); + op->cancel(op); op->state = FSCACHE_OP_ST_CANCELLED; if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags)) object->n_exclusive--; if (test_and_clear_bit(FSCACHE_OP_WAITING, &op->flags)) wake_up_bit(&op->flags, FSCACHE_OP_WAITING); - fscache_put_operation(op); ret = 0; } + if (put) + fscache_put_operation(op); spin_unlock(&object->lock); _leave(" = %d", ret); return ret; @@ -345,6 +420,7 @@ void fscache_cancel_all_ops(struct fscache_object *object) list_del_init(&op->pend_link); ASSERTCMP(op->state, ==, FSCACHE_OP_ST_PENDING); + op->cancel(op); op->state = FSCACHE_OP_ST_CANCELLED; if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags)) @@ -377,8 +453,12 @@ void fscache_op_complete(struct fscache_operation *op, bool cancelled) spin_lock(&object->lock); - op->state = cancelled ? - FSCACHE_OP_ST_CANCELLED : FSCACHE_OP_ST_COMPLETE; + if (!cancelled) { + op->state = FSCACHE_OP_ST_COMPLETE; + } else { + op->cancel(op); + op->state = FSCACHE_OP_ST_CANCELLED; + } if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags)) object->n_exclusive--; @@ -409,9 +489,9 @@ void fscache_put_operation(struct fscache_operation *op) return; _debug("PUT OP"); - ASSERTIFCMP(op->state != FSCACHE_OP_ST_COMPLETE, + ASSERTIFCMP(op->state != FSCACHE_OP_ST_INITIALISED && + op->state != FSCACHE_OP_ST_COMPLETE, op->state, ==, FSCACHE_OP_ST_CANCELLED); - op->state = FSCACHE_OP_ST_DEAD; fscache_stat(&fscache_n_op_release); @@ -419,37 +499,39 @@ void fscache_put_operation(struct fscache_operation *op) op->release(op); op->release = NULL; } + op->state = FSCACHE_OP_ST_DEAD; object = op->object; + if (likely(object)) { + if (test_bit(FSCACHE_OP_DEC_READ_CNT, &op->flags)) + atomic_dec(&object->n_reads); + if (test_bit(FSCACHE_OP_UNUSE_COOKIE, &op->flags)) + fscache_unuse_cookie(object); + + /* now... we may get called with the object spinlock held, so we + * complete the cleanup here only if we can immediately acquire the + * lock, and defer it otherwise */ + if (!spin_trylock(&object->lock)) { + _debug("defer put"); + fscache_stat(&fscache_n_op_deferred_release); + + cache = object->cache; + spin_lock(&cache->op_gc_list_lock); + list_add_tail(&op->pend_link, &cache->op_gc_list); + spin_unlock(&cache->op_gc_list_lock); + schedule_work(&cache->op_gc); + _leave(" [defer]"); + return; + } - if (test_bit(FSCACHE_OP_DEC_READ_CNT, &op->flags)) - atomic_dec(&object->n_reads); - if (test_bit(FSCACHE_OP_UNUSE_COOKIE, &op->flags)) - fscache_unuse_cookie(object); - - /* now... we may get called with the object spinlock held, so we - * complete the cleanup here only if we can immediately acquire the - * lock, and defer it otherwise */ - if (!spin_trylock(&object->lock)) { - _debug("defer put"); - fscache_stat(&fscache_n_op_deferred_release); + ASSERTCMP(object->n_ops, >, 0); + object->n_ops--; + if (object->n_ops == 0) + fscache_raise_event(object, FSCACHE_OBJECT_EV_CLEARED); - cache = object->cache; - spin_lock(&cache->op_gc_list_lock); - list_add_tail(&op->pend_link, &cache->op_gc_list); - spin_unlock(&cache->op_gc_list_lock); - schedule_work(&cache->op_gc); - _leave(" [defer]"); - return; + spin_unlock(&object->lock); } - ASSERTCMP(object->n_ops, >, 0); - object->n_ops--; - if (object->n_ops == 0) - fscache_raise_event(object, FSCACHE_OBJECT_EV_CLEARED); - - spin_unlock(&object->lock); - kfree(op); _leave(" [done]"); } diff --git a/fs/fscache/page.c b/fs/fscache/page.c index de33b3f..483bbc6 100644 --- a/fs/fscache/page.c +++ b/fs/fscache/page.c @@ -213,7 +213,7 @@ int __fscache_attr_changed(struct fscache_cookie *cookie) return -ENOMEM; } - fscache_operation_init(op, fscache_attr_changed_op, NULL); + fscache_operation_init(op, fscache_attr_changed_op, NULL, NULL); op->flags = FSCACHE_OP_ASYNC | (1 << FSCACHE_OP_EXCLUSIVE) | (1 << FSCACHE_OP_UNUSE_COOKIE); @@ -239,7 +239,7 @@ nobufs_dec: wake_cookie = __fscache_unuse_cookie(cookie); nobufs: spin_unlock(&cookie->lock); - kfree(op); + fscache_put_operation(op); if (wake_cookie) __fscache_wake_unused_cookie(cookie); fscache_stat(&fscache_n_attr_changed_nobufs); @@ -249,6 +249,17 @@ nobufs: EXPORT_SYMBOL(__fscache_attr_changed); /* + * Handle cancellation of a pending retrieval op + */ +static void fscache_do_cancel_retrieval(struct fscache_operation *_op) +{ + struct fscache_retrieval *op = + container_of(_op, struct fscache_retrieval, op); + + atomic_set(&op->n_pages, 0); +} + +/* * release a retrieval op reference */ static void fscache_release_retrieval_op(struct fscache_operation *_op) @@ -258,11 +269,12 @@ static void fscache_release_retrieval_op(struct fscache_operation *_op) _enter("{OP%x}", op->op.debug_id); - ASSERTCMP(atomic_read(&op->n_pages), ==, 0); + ASSERTIFCMP(op->op.state != FSCACHE_OP_ST_INITIALISED, + atomic_read(&op->n_pages), ==, 0); fscache_hist(fscache_retrieval_histogram, op->start_time); if (op->context) - fscache_put_context(op->op.object->cookie, op->context); + fscache_put_context(op->cookie, op->context); _leave(""); } @@ -285,15 +297,24 @@ static struct fscache_retrieval *fscache_alloc_retrieval( return NULL; } - fscache_operation_init(&op->op, NULL, fscache_release_retrieval_op); + fscache_operation_init(&op->op, NULL, + fscache_do_cancel_retrieval, + fscache_release_retrieval_op); op->op.flags = FSCACHE_OP_MYTHREAD | (1UL << FSCACHE_OP_WAITING) | (1UL << FSCACHE_OP_UNUSE_COOKIE); + op->cookie = cookie; op->mapping = mapping; op->end_io_func = end_io_func; op->context = context; op->start_time = jiffies; INIT_LIST_HEAD(&op->to_do); + + /* Pin the netfs read context in case we need to do the actual netfs + * read because we've encountered a cache read failure. + */ + if (context) + fscache_get_context(op->cookie, context); return op; } @@ -330,24 +351,12 @@ int fscache_wait_for_deferred_lookup(struct fscache_cookie *cookie) } /* - * Handle cancellation of a pending retrieval op - */ -static void fscache_do_cancel_retrieval(struct fscache_operation *_op) -{ - struct fscache_retrieval *op = - container_of(_op, struct fscache_retrieval, op); - - atomic_set(&op->n_pages, 0); -} - -/* * wait for an object to become active (or dead) */ int fscache_wait_for_operation_activation(struct fscache_object *object, struct fscache_operation *op, atomic_t *stat_op_waits, - atomic_t *stat_object_dead, - void (*do_cancel)(struct fscache_operation *)) + atomic_t *stat_object_dead) { int ret; @@ -359,7 +368,7 @@ int fscache_wait_for_operation_activation(struct fscache_object *object, fscache_stat(stat_op_waits); if (wait_on_bit(&op->flags, FSCACHE_OP_WAITING, TASK_INTERRUPTIBLE) != 0) { - ret = fscache_cancel_op(op, do_cancel); + ret = fscache_cancel_op(op, false); if (ret == 0) return -ERESTARTSYS; @@ -377,11 +386,13 @@ check_if_dead: _leave(" = -ENOBUFS [cancelled]"); return -ENOBUFS; } - if (unlikely(fscache_object_is_dead(object))) { - pr_err("%s() = -ENOBUFS [obj dead %d]\n", __func__, op->state); - fscache_cancel_op(op, do_cancel); + if (unlikely(fscache_object_is_dying(object) || + fscache_cache_is_broken(object))) { + enum fscache_operation_state state = op->state; + fscache_cancel_op(op, true); if (stat_object_dead) fscache_stat(stat_object_dead); + _leave(" = -ENOBUFS [obj dead %d]", state); return -ENOBUFS; } return 0; @@ -453,17 +464,12 @@ int __fscache_read_or_alloc_page(struct fscache_cookie *cookie, fscache_stat(&fscache_n_retrieval_ops); - /* pin the netfs read context in case we need to do the actual netfs - * read because we've encountered a cache read failure */ - fscache_get_context(object->cookie, op->context); - /* we wait for the operation to become active, and then process it * *here*, in this thread, and not in the thread pool */ ret = fscache_wait_for_operation_activation( object, &op->op, __fscache_stat(&fscache_n_retrieval_op_waits), - __fscache_stat(&fscache_n_retrievals_object_dead), - fscache_do_cancel_retrieval); + __fscache_stat(&fscache_n_retrievals_object_dead)); if (ret < 0) goto error; @@ -503,7 +509,7 @@ nobufs_unlock: spin_unlock(&cookie->lock); if (wake_cookie) __fscache_wake_unused_cookie(cookie); - kfree(op); + fscache_put_retrieval(op); nobufs: fscache_stat(&fscache_n_retrievals_nobufs); _leave(" = -ENOBUFS"); @@ -584,17 +590,12 @@ int __fscache_read_or_alloc_pages(struct fscache_cookie *cookie, fscache_stat(&fscache_n_retrieval_ops); - /* pin the netfs read context in case we need to do the actual netfs - * read because we've encountered a cache read failure */ - fscache_get_context(object->cookie, op->context); - /* we wait for the operation to become active, and then process it * *here*, in this thread, and not in the thread pool */ ret = fscache_wait_for_operation_activation( object, &op->op, __fscache_stat(&fscache_n_retrieval_op_waits), - __fscache_stat(&fscache_n_retrievals_object_dead), - fscache_do_cancel_retrieval); + __fscache_stat(&fscache_n_retrievals_object_dead)); if (ret < 0) goto error; @@ -632,7 +633,7 @@ nobufs_unlock_dec: wake_cookie = __fscache_unuse_cookie(cookie); nobufs_unlock: spin_unlock(&cookie->lock); - kfree(op); + fscache_put_retrieval(op); if (wake_cookie) __fscache_wake_unused_cookie(cookie); nobufs: @@ -700,8 +701,7 @@ int __fscache_alloc_page(struct fscache_cookie *cookie, ret = fscache_wait_for_operation_activation( object, &op->op, __fscache_stat(&fscache_n_alloc_op_waits), - __fscache_stat(&fscache_n_allocs_object_dead), - fscache_do_cancel_retrieval); + __fscache_stat(&fscache_n_allocs_object_dead)); if (ret < 0) goto error; @@ -726,7 +726,7 @@ nobufs_unlock_dec: wake_cookie = __fscache_unuse_cookie(cookie); nobufs_unlock: spin_unlock(&cookie->lock); - kfree(op); + fscache_put_retrieval(op); if (wake_cookie) __fscache_wake_unused_cookie(cookie); nobufs: @@ -944,7 +944,7 @@ int __fscache_write_page(struct fscache_cookie *cookie, if (!op) goto nomem; - fscache_operation_init(&op->op, fscache_write_op, + fscache_operation_init(&op->op, fscache_write_op, NULL, fscache_release_write_op); op->op.flags = FSCACHE_OP_ASYNC | (1 << FSCACHE_OP_WAITING) | @@ -1016,7 +1016,7 @@ already_pending: spin_unlock(&object->lock); spin_unlock(&cookie->lock); radix_tree_preload_end(); - kfree(op); + fscache_put_operation(&op->op); fscache_stat(&fscache_n_stores_ok); _leave(" = 0"); return 0; @@ -1036,7 +1036,7 @@ nobufs_unlock_obj: nobufs: spin_unlock(&cookie->lock); radix_tree_preload_end(); - kfree(op); + fscache_put_operation(&op->op); if (wake_cookie) __fscache_wake_unused_cookie(cookie); fscache_stat(&fscache_n_stores_nobufs); @@ -1044,7 +1044,7 @@ nobufs: return -ENOBUFS; nomem_free: - kfree(op); + fscache_put_operation(&op->op); nomem: fscache_stat(&fscache_n_stores_oom); _leave(" = -ENOMEM"); diff --git a/fs/fscache/stats.c b/fs/fscache/stats.c index 40d13c7..7cfa0aa 100644 --- a/fs/fscache/stats.c +++ b/fs/fscache/stats.c @@ -23,6 +23,7 @@ atomic_t fscache_n_op_run; atomic_t fscache_n_op_enqueue; atomic_t fscache_n_op_requeue; atomic_t fscache_n_op_deferred_release; +atomic_t fscache_n_op_initialised; atomic_t fscache_n_op_release; atomic_t fscache_n_op_gc; atomic_t fscache_n_op_cancelled; @@ -130,6 +131,11 @@ atomic_t fscache_n_cop_write_page; atomic_t fscache_n_cop_uncache_page; atomic_t fscache_n_cop_dissociate_pages; +atomic_t fscache_n_cache_no_space_reject; +atomic_t fscache_n_cache_stale_objects; +atomic_t fscache_n_cache_retired_objects; +atomic_t fscache_n_cache_culled_objects; + /* * display the general statistics */ @@ -246,7 +252,8 @@ static int fscache_stats_show(struct seq_file *m, void *v) atomic_read(&fscache_n_op_enqueue), atomic_read(&fscache_n_op_cancelled), atomic_read(&fscache_n_op_rejected)); - seq_printf(m, "Ops : dfr=%u rel=%u gc=%u\n", + seq_printf(m, "Ops : ini=%u dfr=%u rel=%u gc=%u\n", + atomic_read(&fscache_n_op_initialised), atomic_read(&fscache_n_op_deferred_release), atomic_read(&fscache_n_op_release), atomic_read(&fscache_n_op_gc)); @@ -271,6 +278,11 @@ static int fscache_stats_show(struct seq_file *m, void *v) atomic_read(&fscache_n_cop_write_page), atomic_read(&fscache_n_cop_uncache_page), atomic_read(&fscache_n_cop_dissociate_pages)); + seq_printf(m, "CacheEv: nsp=%d stl=%d rtr=%d cul=%d\n", + atomic_read(&fscache_n_cache_no_space_reject), + atomic_read(&fscache_n_cache_stale_objects), + atomic_read(&fscache_n_cache_retired_objects), + atomic_read(&fscache_n_cache_culled_objects)); return 0; } diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 014fa8b..f523f2f 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -1169,7 +1169,7 @@ static ssize_t fuse_file_write_iter(struct kiocb *iocb, struct iov_iter *from) if (err <= 0) goto out; - err = file_remove_suid(file); + err = file_remove_privs(file); if (err) goto out; diff --git a/fs/hfs/hfs_fs.h b/fs/hfs/hfs_fs.h index 95d2552..1f1c7dc 100644 --- a/fs/hfs/hfs_fs.h +++ b/fs/hfs/hfs_fs.h @@ -252,7 +252,7 @@ extern void hfs_mark_mdb_dirty(struct super_block *sb); #define __hfs_u_to_mtime(sec) cpu_to_be32(sec + 2082844800U - sys_tz.tz_minuteswest * 60) #define __hfs_m_to_utime(sec) (be32_to_cpu(sec) - 2082844800U + sys_tz.tz_minuteswest * 60) -#define HFS_I(inode) (list_entry(inode, struct hfs_inode_info, vfs_inode)) +#define HFS_I(inode) (container_of(inode, struct hfs_inode_info, vfs_inode)) #define HFS_SB(sb) ((struct hfs_sb_info *)(sb)->s_fs_info) #define hfs_m_to_utime(time) (struct timespec){ .tv_sec = __hfs_m_to_utime(time) } diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h index b0441d6..f91a1fa 100644 --- a/fs/hfsplus/hfsplus_fs.h +++ b/fs/hfsplus/hfsplus_fs.h @@ -263,7 +263,7 @@ struct hfsplus_inode_info { static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode) { - return list_entry(inode, struct hfsplus_inode_info, vfs_inode); + return container_of(inode, struct hfsplus_inode_info, vfs_inode); } /* diff --git a/fs/hpfs/hpfs_fn.h b/fs/hpfs/hpfs_fn.h index b63b75f..bb04b58 100644 --- a/fs/hpfs/hpfs_fn.h +++ b/fs/hpfs/hpfs_fn.h @@ -304,7 +304,7 @@ extern const struct address_space_operations hpfs_symlink_aops; static inline struct hpfs_inode_info *hpfs_i(struct inode *inode) { - return list_entry(inode, struct hpfs_inode_info, vfs_inode); + return container_of(inode, struct hpfs_inode_info, vfs_inode); } static inline struct hpfs_sb_info *hpfs_sb(struct super_block *sb) @@ -841,7 +841,11 @@ unsigned int get_next_ino(void) } #endif - *p = ++res; + res++; + /* get_next_ino should not provide a 0 inode number */ + if (unlikely(!res)) + res++; + *p = res; put_cpu_var(last_ino); return res; } @@ -1674,7 +1678,31 @@ int should_remove_suid(struct dentry *dentry) } EXPORT_SYMBOL(should_remove_suid); -static int __remove_suid(struct dentry *dentry, int kill) +/* + * Return mask of changes for notify_change() that need to be done as a + * response to write or truncate. Return 0 if nothing has to be changed. + * Negative value on error (change should be denied). + */ +int dentry_needs_remove_privs(struct dentry *dentry) +{ + struct inode *inode = d_inode(dentry); + int mask = 0; + int ret; + + if (IS_NOSEC(inode)) + return 0; + + mask = should_remove_suid(dentry); + ret = security_inode_need_killpriv(dentry); + if (ret < 0) + return ret; + if (ret) + mask |= ATTR_KILL_PRIV; + return mask; +} +EXPORT_SYMBOL(dentry_needs_remove_privs); + +static int __remove_privs(struct dentry *dentry, int kill) { struct iattr newattrs; @@ -1686,33 +1714,32 @@ static int __remove_suid(struct dentry *dentry, int kill) return notify_change(dentry, &newattrs, NULL); } -int file_remove_suid(struct file *file) +/* + * Remove special file priviledges (suid, capabilities) when file is written + * to or truncated. + */ +int file_remove_privs(struct file *file) { struct dentry *dentry = file->f_path.dentry; struct inode *inode = d_inode(dentry); - int killsuid; - int killpriv; + int kill; int error = 0; /* Fast path for nothing security related */ if (IS_NOSEC(inode)) return 0; - killsuid = should_remove_suid(dentry); - killpriv = security_inode_need_killpriv(dentry); - - if (killpriv < 0) - return killpriv; - if (killpriv) - error = security_inode_killpriv(dentry); - if (!error && killsuid) - error = __remove_suid(dentry, killsuid); - if (!error && (inode->i_sb->s_flags & MS_NOSEC)) - inode->i_flags |= S_NOSEC; + kill = file_needs_remove_privs(file); + if (kill < 0) + return kill; + if (kill) + error = __remove_privs(dentry, kill); + if (!error) + inode_has_no_xattr(inode); return error; } -EXPORT_SYMBOL(file_remove_suid); +EXPORT_SYMBOL(file_remove_privs); /** * file_update_time - update mtime and ctime time @@ -1967,9 +1994,8 @@ EXPORT_SYMBOL(inode_dio_wait); * inode is being instantiated). The reason for the cmpxchg() loop * --- which wouldn't be necessary if all code paths which modify * i_flags actually followed this rule, is that there is at least one - * code path which doesn't today --- for example, - * __generic_file_aio_write() calls file_remove_suid() without holding - * i_mutex --- so we use cmpxchg() out of an abundance of caution. + * code path which doesn't today so we use cmpxchg() out of an abundance + * of caution. * * In the long run, i_mutex is overkill, and we should probably look * at using the i_lock spinlock to protect i_flags, and then make sure diff --git a/fs/internal.h b/fs/internal.h index 01dce1d..4d5af58 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -107,6 +107,7 @@ extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, extern long do_handle_open(int mountdirfd, struct file_handle __user *ufh, int open_flag); extern int open_check_o_direct(struct file *f); +extern int vfs_open(const struct path *, struct file *, const struct cred *); /* * inode.c diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h index d200a9b..824e61e 100644 --- a/fs/jffs2/os-linux.h +++ b/fs/jffs2/os-linux.h @@ -19,7 +19,7 @@ struct kstatfs; struct kvec; -#define JFFS2_INODE_INFO(i) (list_entry(i, struct jffs2_inode_info, vfs_inode)) +#define JFFS2_INODE_INFO(i) (container_of(i, struct jffs2_inode_info, vfs_inode)) #define OFNI_EDONI_2SFFJ(f) (&(f)->vfs_inode) #define JFFS2_SB_INFO(sb) (sb->s_fs_info) #define OFNI_BS_2SFFJ(c) ((struct super_block *)c->os_priv) diff --git a/fs/jfs/jfs_incore.h b/fs/jfs/jfs_incore.h index fa7e795..1f26d19 100644 --- a/fs/jfs/jfs_incore.h +++ b/fs/jfs/jfs_incore.h @@ -206,7 +206,7 @@ struct jfs_sb_info { static inline struct jfs_inode_info *JFS_IP(struct inode *inode) { - return list_entry(inode, struct jfs_inode_info, vfs_inode); + return container_of(inode, struct jfs_inode_info, vfs_inode); } static inline int jfs_dirtable_inline(struct inode *inode) @@ -20,11 +20,6 @@ #include "internal.h" -static inline int simple_positive(struct dentry *dentry) -{ - return d_really_is_positive(dentry) && !d_unhashed(dentry); -} - int simple_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) { diff --git a/fs/minix/dir.c b/fs/minix/dir.c index 118e4e7..d19ac25 100644 --- a/fs/minix/dir.c +++ b/fs/minix/dir.c @@ -45,11 +45,6 @@ minix_last_byte(struct inode *inode, unsigned long page_nr) return last_byte; } -static inline unsigned long dir_pages(struct inode *inode) -{ - return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT; -} - static int dir_commit_chunk(struct page *page, loff_t pos, unsigned len) { struct address_space *mapping = page->mapping; diff --git a/fs/minix/minix.h b/fs/minix/minix.h index 1ebd118..01ad81d 100644 --- a/fs/minix/minix.h +++ b/fs/minix/minix.h @@ -84,7 +84,7 @@ static inline struct minix_sb_info *minix_sb(struct super_block *sb) static inline struct minix_inode_info *minix_i(struct inode *inode) { - return list_entry(inode, struct minix_inode_info, vfs_inode); + return container_of(inode, struct minix_inode_info, vfs_inode); } static inline unsigned minix_blocks_needed(unsigned bits, unsigned blocksize) @@ -792,7 +792,7 @@ static void set_root(struct nameidata *nd) get_fs_root(current->fs, &nd->root); } -static unsigned set_root_rcu(struct nameidata *nd) +static void set_root_rcu(struct nameidata *nd) { struct fs_struct *fs = current->fs; unsigned seq; @@ -802,7 +802,6 @@ static unsigned set_root_rcu(struct nameidata *nd) nd->root = fs->root; nd->root_seq = __read_seqcount_begin(&nd->root.dentry->d_seq); } while (read_seqcount_retry(&fs->seq, seq)); - return nd->root_seq; } static void path_put_conditional(struct path *path, struct nameidata *nd) @@ -1998,7 +1997,8 @@ static const char *path_init(struct nameidata *nd, unsigned flags) if (*s == '/') { if (flags & LOOKUP_RCU) { rcu_read_lock(); - nd->seq = set_root_rcu(nd); + set_root_rcu(nd); + nd->seq = nd->root_seq; } else { set_root(nd); path_get(&nd->root); diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c index 80021c7..93575e9 100644 --- a/fs/ncpfs/dir.c +++ b/fs/ncpfs/dir.c @@ -1145,6 +1145,8 @@ static int ncp_rename(struct inode *old_dir, struct dentry *old_dentry, case 0x00: ncp_dbg(1, "renamed %pd -> %pd\n", old_dentry, new_dentry); + ncp_d_prune(old_dentry); + ncp_d_prune(new_dentry); break; case 0x9E: error = -ENAMETOOLONG; diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 21457bb..547308a 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -1768,7 +1768,7 @@ EXPORT_SYMBOL_GPL(nfs_mkdir); static void nfs_dentry_handle_enoent(struct dentry *dentry) { - if (d_really_is_positive(dentry) && !d_unhashed(dentry)) + if (simple_positive(dentry)) d_delete(dentry); } diff --git a/fs/nilfs2/dir.c b/fs/nilfs2/dir.c index 0ee0bed..6b8b92b 100644 --- a/fs/nilfs2/dir.c +++ b/fs/nilfs2/dir.c @@ -61,11 +61,6 @@ static inline void nilfs_put_page(struct page *page) page_cache_release(page); } -static inline unsigned long dir_pages(struct inode *inode) -{ - return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT; -} - /* * Return the offset into page `page_nr' of the last valid * byte in that page, plus one. diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c index 258d9fe..4a73d6d 100644 --- a/fs/nilfs2/inode.c +++ b/fs/nilfs2/inode.c @@ -307,31 +307,13 @@ static int nilfs_write_end(struct file *file, struct address_space *mapping, static ssize_t nilfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset) { - struct file *file = iocb->ki_filp; - struct address_space *mapping = file->f_mapping; - struct inode *inode = file->f_mapping->host; - size_t count = iov_iter_count(iter); - ssize_t size; + struct inode *inode = file_inode(iocb->ki_filp); if (iov_iter_rw(iter) == WRITE) return 0; /* Needs synchronization with the cleaner */ - size = blockdev_direct_IO(iocb, inode, iter, offset, nilfs_get_block); - - /* - * In case of error extending write may have instantiated a few - * blocks outside i_size. Trim these off again. - */ - if (unlikely(iov_iter_rw(iter) == WRITE && size < 0)) { - loff_t isize = i_size_read(inode); - loff_t end = offset + count; - - if (end > isize) - nilfs_write_failed(mapping, end); - } - - return size; + return blockdev_direct_IO(iocb, inode, iter, offset, nilfs_get_block); } const struct address_space_operations nilfs_aops = { diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c index 2cd6536..262561f 100644 --- a/fs/ntfs/file.c +++ b/fs/ntfs/file.c @@ -382,7 +382,7 @@ static ssize_t ntfs_prepare_file_for_write(struct kiocb *iocb, base_ni = ni; if (NInoAttr(ni)) base_ni = ni->ext.base_ntfs_ino; - err = file_remove_suid(file); + err = file_remove_privs(file); if (unlikely(err)) goto out; /* diff --git a/fs/ntfs/inode.h b/fs/ntfs/inode.h index 76b6cfb..b3c3469 100644 --- a/fs/ntfs/inode.h +++ b/fs/ntfs/inode.h @@ -239,7 +239,7 @@ typedef struct { */ static inline ntfs_inode *NTFS_I(struct inode *inode) { - return (ntfs_inode *)list_entry(inode, big_ntfs_inode, vfs_inode); + return (ntfs_inode *)container_of(inode, big_ntfs_inode, vfs_inode); } static inline struct inode *VFS_I(ntfs_inode *ni) @@ -51,8 +51,10 @@ int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs, newattrs.ia_valid |= ATTR_FILE; } - /* Remove suid/sgid on truncate too */ - ret = should_remove_suid(dentry); + /* Remove suid, sgid, and file capabilities on truncate too */ + ret = dentry_needs_remove_privs(dentry); + if (ret < 0) + return ret; if (ret) newattrs.ia_valid |= ret | ATTR_FORCE; @@ -678,18 +680,18 @@ int open_check_o_direct(struct file *f) } static int do_dentry_open(struct file *f, + struct inode *inode, int (*open)(struct inode *, struct file *), const struct cred *cred) { static const struct file_operations empty_fops = {}; - struct inode *inode; int error; f->f_mode = OPEN_FMODE(f->f_flags) | FMODE_LSEEK | FMODE_PREAD | FMODE_PWRITE; path_get(&f->f_path); - inode = f->f_inode = f->f_path.dentry->d_inode; + f->f_inode = inode; f->f_mapping = inode->i_mapping; if (unlikely(f->f_flags & O_PATH)) { @@ -793,7 +795,8 @@ int finish_open(struct file *file, struct dentry *dentry, BUG_ON(*opened & FILE_OPENED); /* once it's opened, it's opened */ file->f_path.dentry = dentry; - error = do_dentry_open(file, open, current_cred()); + error = do_dentry_open(file, d_backing_inode(dentry), open, + current_cred()); if (!error) *opened |= FILE_OPENED; @@ -822,6 +825,34 @@ int finish_no_open(struct file *file, struct dentry *dentry) } EXPORT_SYMBOL(finish_no_open); +char *file_path(struct file *filp, char *buf, int buflen) +{ + return d_path(&filp->f_path, buf, buflen); +} +EXPORT_SYMBOL(file_path); + +/** + * vfs_open - open the file at the given path + * @path: path to open + * @file: newly allocated file with f_flag initialized + * @cred: credentials to use + */ +int vfs_open(const struct path *path, struct file *file, + const struct cred *cred) +{ + struct dentry *dentry = path->dentry; + struct inode *inode = dentry->d_inode; + + file->f_path = *path; + if (dentry->d_flags & DCACHE_OP_SELECT_INODE) { + inode = dentry->d_op->d_select_inode(dentry, file->f_flags); + if (IS_ERR(inode)) + return PTR_ERR(inode); + } + + return do_dentry_open(file, inode, NULL, cred); +} + struct file *dentry_open(const struct path *path, int flags, const struct cred *cred) { @@ -853,26 +884,6 @@ struct file *dentry_open(const struct path *path, int flags, } EXPORT_SYMBOL(dentry_open); -/** - * vfs_open - open the file at the given path - * @path: path to open - * @filp: newly allocated file with f_flag initialized - * @cred: credentials to use - */ -int vfs_open(const struct path *path, struct file *filp, - const struct cred *cred) -{ - struct inode *inode = path->dentry->d_inode; - - if (inode->i_op->dentry_open) - return inode->i_op->dentry_open(path->dentry, filp, cred); - else { - filp->f_path = *path; - return do_dentry_open(filp, NULL, cred); - } -} -EXPORT_SYMBOL(vfs_open); - static inline int build_open_flags(int flags, umode_t mode, struct open_flags *op) { int lookup_flags = 0; diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index 308379b..f140e3db 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -337,37 +337,30 @@ static bool ovl_open_need_copy_up(int flags, enum ovl_path_type type, return true; } -static int ovl_dentry_open(struct dentry *dentry, struct file *file, - const struct cred *cred) +struct inode *ovl_d_select_inode(struct dentry *dentry, unsigned file_flags) { int err; struct path realpath; enum ovl_path_type type; - bool want_write = false; type = ovl_path_real(dentry, &realpath); - if (ovl_open_need_copy_up(file->f_flags, type, realpath.dentry)) { - want_write = true; + if (ovl_open_need_copy_up(file_flags, type, realpath.dentry)) { err = ovl_want_write(dentry); if (err) - goto out; + return ERR_PTR(err); - if (file->f_flags & O_TRUNC) + if (file_flags & O_TRUNC) err = ovl_copy_up_last(dentry, NULL, true); else err = ovl_copy_up(dentry); + ovl_drop_write(dentry); if (err) - goto out_drop_write; + return ERR_PTR(err); ovl_path_upper(dentry, &realpath); } - err = vfs_open(&realpath, file, cred); -out_drop_write: - if (want_write) - ovl_drop_write(dentry); -out: - return err; + return d_backing_inode(realpath.dentry); } static const struct inode_operations ovl_file_inode_operations = { @@ -378,7 +371,6 @@ static const struct inode_operations ovl_file_inode_operations = { .getxattr = ovl_getxattr, .listxattr = ovl_listxattr, .removexattr = ovl_removexattr, - .dentry_open = ovl_dentry_open, }; static const struct inode_operations ovl_symlink_inode_operations = { diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index 17ac5af..ea5a40b 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -173,6 +173,7 @@ ssize_t ovl_getxattr(struct dentry *dentry, const char *name, void *value, size_t size); ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size); int ovl_removexattr(struct dentry *dentry, const char *name); +struct inode *ovl_d_select_inode(struct dentry *dentry, unsigned file_flags); struct inode *ovl_new_inode(struct super_block *sb, umode_t mode, struct ovl_entry *oe); diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index 8a08c58..7466ff3 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -316,6 +316,7 @@ static int ovl_dentry_weak_revalidate(struct dentry *dentry, unsigned int flags) static const struct dentry_operations ovl_dentry_operations = { .d_release = ovl_dentry_release, + .d_select_inode = ovl_d_select_inode, }; static const struct dentry_operations ovl_reval_dentry_operations = { diff --git a/fs/posix_acl.c b/fs/posix_acl.c index 84bb65b8..4fb17de 100644 --- a/fs/posix_acl.c +++ b/fs/posix_acl.c @@ -547,51 +547,45 @@ posix_acl_create(struct inode *dir, umode_t *mode, struct posix_acl **default_acl, struct posix_acl **acl) { struct posix_acl *p; + struct posix_acl *clone; int ret; + *acl = NULL; + *default_acl = NULL; + if (S_ISLNK(*mode) || !IS_POSIXACL(dir)) - goto no_acl; + return 0; p = get_acl(dir, ACL_TYPE_DEFAULT); - if (IS_ERR(p)) { - if (p == ERR_PTR(-EOPNOTSUPP)) - goto apply_umask; - return PTR_ERR(p); + if (!p || p == ERR_PTR(-EOPNOTSUPP)) { + *mode &= ~current_umask(); + return 0; } + if (IS_ERR(p)) + return PTR_ERR(p); - if (!p) - goto apply_umask; - - *acl = posix_acl_clone(p, GFP_NOFS); - if (!*acl) + clone = posix_acl_clone(p, GFP_NOFS); + if (!clone) goto no_mem; - ret = posix_acl_create_masq(*acl, mode); + ret = posix_acl_create_masq(clone, mode); if (ret < 0) goto no_mem_clone; - if (ret == 0) { - posix_acl_release(*acl); - *acl = NULL; - } + if (ret == 0) + posix_acl_release(clone); + else + *acl = clone; - if (!S_ISDIR(*mode)) { + if (!S_ISDIR(*mode)) posix_acl_release(p); - *default_acl = NULL; - } else { + else *default_acl = p; - } - return 0; -apply_umask: - *mode &= ~current_umask(); -no_acl: - *default_acl = NULL; - *acl = NULL; return 0; no_mem_clone: - posix_acl_release(*acl); + posix_acl_release(clone); no_mem: posix_acl_release(p); return -ENOMEM; diff --git a/fs/proc/nommu.c b/fs/proc/nommu.c index d4a3574..f8595e8 100644 --- a/fs/proc/nommu.c +++ b/fs/proc/nommu.c @@ -64,7 +64,7 @@ static int nommu_region_show(struct seq_file *m, struct vm_region *region) if (file) { seq_pad(m, ' '); - seq_path(m, &file->f_path, ""); + seq_file_path(m, file, ""); } seq_putc(m, '\n'); diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 6dee68d..ca1e091 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -310,7 +310,7 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid) */ if (file) { seq_pad(m, ' '); - seq_path(m, &file->f_path, "\n"); + seq_file_path(m, file, "\n"); goto done; } @@ -1509,7 +1509,7 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid) if (file) { seq_puts(m, " file="); - seq_path(m, &file->f_path, "\n\t= "); + seq_file_path(m, file, "\n\t= "); } else if (vma->vm_start <= mm->brk && vma->vm_end >= mm->start_brk) { seq_puts(m, " heap"); } else { diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c index 599ec2e..e0d64c9 100644 --- a/fs/proc/task_nommu.c +++ b/fs/proc/task_nommu.c @@ -180,7 +180,7 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma, if (file) { seq_pad(m, ' '); - seq_path(m, &file->f_path, ""); + seq_file_path(m, file, ""); } else if (mm) { pid_t tid = pid_of_stack(priv, vma, is_pid); diff --git a/fs/qnx6/dir.c b/fs/qnx6/dir.c index 8d64bb5..e1f3727 100644 --- a/fs/qnx6/dir.c +++ b/fs/qnx6/dir.c @@ -32,11 +32,6 @@ static struct page *qnx6_get_page(struct inode *dir, unsigned long n) return page; } -static inline unsigned long dir_pages(struct inode *inode) -{ - return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT; -} - static unsigned last_entry(struct inode *inode, unsigned long page_nr) { unsigned long last_byte = inode->i_size; diff --git a/fs/seq_file.c b/fs/seq_file.c index 1d9c1cb..ce9e39f 100644 --- a/fs/seq_file.c +++ b/fs/seq_file.c @@ -490,6 +490,20 @@ int seq_path(struct seq_file *m, const struct path *path, const char *esc) } EXPORT_SYMBOL(seq_path); +/** + * seq_file_path - seq_file interface to print a pathname of a file + * @m: the seq_file handle + * @file: the struct file to print + * @esc: set of characters to escape in the output + * + * return the absolute path to the file. + */ +int seq_file_path(struct seq_file *m, struct file *file, const char *esc) +{ + return seq_path(m, &file->f_path, esc); +} +EXPORT_SYMBOL(seq_file_path); + /* * Same as seq_path, but relative to supplied root. */ diff --git a/fs/squashfs/squashfs_fs_i.h b/fs/squashfs/squashfs_fs_i.h index 73588e7..d09fcd6 100644 --- a/fs/squashfs/squashfs_fs_i.h +++ b/fs/squashfs/squashfs_fs_i.h @@ -49,6 +49,6 @@ struct squashfs_inode_info { static inline struct squashfs_inode_info *squashfs_i(struct inode *inode) { - return list_entry(inode, struct squashfs_inode_info, vfs_inode); + return container_of(inode, struct squashfs_inode_info, vfs_inode); } #endif @@ -842,7 +842,7 @@ int get_anon_bdev(dev_t *p) else if (error) return -EAGAIN; - if (dev == (1 << MINORBITS)) { + if (dev >= (1 << MINORBITS)) { spin_lock(&unnamed_dev_lock); ida_remove(&unnamed_dev_ida, dev); if (unnamed_dev_start > dev) diff --git a/fs/sysv/dir.c b/fs/sysv/dir.c index 8f3555f..63c1bcb 100644 --- a/fs/sysv/dir.c +++ b/fs/sysv/dir.c @@ -33,11 +33,6 @@ static inline void dir_put_page(struct page *page) page_cache_release(page); } -static inline unsigned long dir_pages(struct inode *inode) -{ - return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT; -} - static int dir_commit_chunk(struct page *page, loff_t pos, unsigned len) { struct address_space *mapping = page->mapping; diff --git a/fs/sysv/sysv.h b/fs/sysv/sysv.h index 2c13525..6c21228 100644 --- a/fs/sysv/sysv.h +++ b/fs/sysv/sysv.h @@ -73,7 +73,7 @@ struct sysv_inode_info { static inline struct sysv_inode_info *SYSV_I(struct inode *inode) { - return list_entry(inode, struct sysv_inode_info, vfs_inode); + return container_of(inode, struct sysv_inode_info, vfs_inode); } static inline struct sysv_sb_info *SYSV_SB(struct super_block *sb) diff --git a/fs/tracefs/inode.c b/fs/tracefs/inode.c index a43df11..cbc8d5d 100644 --- a/fs/tracefs/inode.c +++ b/fs/tracefs/inode.c @@ -496,16 +496,11 @@ struct dentry *tracefs_create_instance_dir(const char *name, struct dentry *pare return dentry; } -static inline int tracefs_positive(struct dentry *dentry) -{ - return dentry->d_inode && !d_unhashed(dentry); -} - static int __tracefs_remove(struct dentry *dentry, struct dentry *parent) { int ret = 0; - if (tracefs_positive(dentry)) { + if (simple_positive(dentry)) { if (dentry->d_inode) { dget(dentry); switch (dentry->d_inode->i_mode & S_IFMT) { @@ -582,7 +577,7 @@ void tracefs_remove_recursive(struct dentry *dentry) */ spin_lock(&parent->d_lock); list_for_each_entry(child, &parent->d_subdirs, d_child) { - if (!tracefs_positive(child)) + if (!simple_positive(child)) continue; /* perhaps simple_empty(child) makes more sense */ @@ -603,7 +598,7 @@ void tracefs_remove_recursive(struct dentry *dentry) * from d_subdirs. When releasing the parent->d_lock we can * no longer trust that the next pointer is valid. * Restart the loop. We'll skip this one with the - * tracefs_positive() check. + * simple_positive() check. */ goto loop; } diff --git a/fs/udf/udf_i.h b/fs/udf/udf_i.h index b5cd8ed..b1b9a63 100644 --- a/fs/udf/udf_i.h +++ b/fs/udf/udf_i.h @@ -56,7 +56,7 @@ struct udf_inode_info { static inline struct udf_inode_info *UDF_I(struct inode *inode) { - return list_entry(inode, struct udf_inode_info, vfs_inode); + return container_of(inode, struct udf_inode_info, vfs_inode); } #endif /* _UDF_I_H) */ diff --git a/fs/ufs/balloc.c b/fs/ufs/balloc.c index 2c10360..a7106ed 100644 --- a/fs/ufs/balloc.c +++ b/fs/ufs/balloc.c @@ -51,8 +51,8 @@ void ufs_free_fragments(struct inode *inode, u64 fragment, unsigned count) if (ufs_fragnum(fragment) + count > uspi->s_fpg) ufs_error (sb, "ufs_free_fragments", "internal error"); - - lock_ufs(sb); + + mutex_lock(&UFS_SB(sb)->s_lock); cgno = ufs_dtog(uspi, fragment); bit = ufs_dtogd(uspi, fragment); @@ -115,13 +115,13 @@ void ufs_free_fragments(struct inode *inode, u64 fragment, unsigned count) if (sb->s_flags & MS_SYNCHRONOUS) ubh_sync_block(UCPI_UBH(ucpi)); ufs_mark_sb_dirty(sb); - - unlock_ufs(sb); + + mutex_unlock(&UFS_SB(sb)->s_lock); UFSD("EXIT\n"); return; failed: - unlock_ufs(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); UFSD("EXIT (FAILED)\n"); return; } @@ -151,7 +151,7 @@ void ufs_free_blocks(struct inode *inode, u64 fragment, unsigned count) goto failed; } - lock_ufs(sb); + mutex_lock(&UFS_SB(sb)->s_lock); do_more: overflow = 0; @@ -211,12 +211,12 @@ do_more: } ufs_mark_sb_dirty(sb); - unlock_ufs(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); UFSD("EXIT\n"); return; failed_unlock: - unlock_ufs(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); failed: UFSD("EXIT (FAILED)\n"); return; @@ -357,7 +357,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment, usb1 = ubh_get_usb_first(uspi); *err = -ENOSPC; - lock_ufs(sb); + mutex_lock(&UFS_SB(sb)->s_lock); tmp = ufs_data_ptr_to_cpu(sb, p); if (count + ufs_fragnum(fragment) > uspi->s_fpb) { @@ -378,19 +378,19 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment, "fragment %llu, tmp %llu\n", (unsigned long long)fragment, (unsigned long long)tmp); - unlock_ufs(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); return INVBLOCK; } if (fragment < UFS_I(inode)->i_lastfrag) { UFSD("EXIT (ALREADY ALLOCATED)\n"); - unlock_ufs(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); return 0; } } else { if (tmp) { UFSD("EXIT (ALREADY ALLOCATED)\n"); - unlock_ufs(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); return 0; } } @@ -399,7 +399,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment, * There is not enough space for user on the device */ if (!capable(CAP_SYS_RESOURCE) && ufs_freespace(uspi, UFS_MINFREE) <= 0) { - unlock_ufs(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); UFSD("EXIT (FAILED)\n"); return 0; } @@ -424,7 +424,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment, ufs_clear_frags(inode, result + oldcount, newcount - oldcount, locked_page != NULL); } - unlock_ufs(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); UFSD("EXIT, result %llu\n", (unsigned long long)result); return result; } @@ -439,7 +439,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment, fragment + count); ufs_clear_frags(inode, result + oldcount, newcount - oldcount, locked_page != NULL); - unlock_ufs(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); UFSD("EXIT, result %llu\n", (unsigned long long)result); return result; } @@ -477,7 +477,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment, *err = 0; UFS_I(inode)->i_lastfrag = max(UFS_I(inode)->i_lastfrag, fragment + count); - unlock_ufs(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); if (newcount < request) ufs_free_fragments (inode, result + newcount, request - newcount); ufs_free_fragments (inode, tmp, oldcount); @@ -485,7 +485,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment, return result; } - unlock_ufs(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); UFSD("EXIT (FAILED)\n"); return 0; } diff --git a/fs/ufs/dir.c b/fs/ufs/dir.c index 1bfe8ca..74f2e80 100644 --- a/fs/ufs/dir.c +++ b/fs/ufs/dir.c @@ -65,11 +65,6 @@ static inline void ufs_put_page(struct page *page) page_cache_release(page); } -static inline unsigned long ufs_dir_pages(struct inode *inode) -{ - return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT; -} - ino_t ufs_inode_by_name(struct inode *dir, const struct qstr *qstr) { ino_t res = 0; @@ -87,7 +82,8 @@ ino_t ufs_inode_by_name(struct inode *dir, const struct qstr *qstr) /* Releases the page */ void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de, - struct page *page, struct inode *inode) + struct page *page, struct inode *inode, + bool update_times) { loff_t pos = page_offset(page) + (char *) de - (char *) page_address(page); @@ -103,7 +99,8 @@ void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de, err = ufs_commit_chunk(page, pos, len); ufs_put_page(page); - dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; + if (update_times) + dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; mark_inode_dirty(dir); } @@ -256,7 +253,7 @@ struct ufs_dir_entry *ufs_find_entry(struct inode *dir, const struct qstr *qstr, int namelen = qstr->len; unsigned reclen = UFS_DIR_REC_LEN(namelen); unsigned long start, n; - unsigned long npages = ufs_dir_pages(dir); + unsigned long npages = dir_pages(dir); struct page *page = NULL; struct ufs_inode_info *ui = UFS_I(dir); struct ufs_dir_entry *de; @@ -320,7 +317,7 @@ int ufs_add_link(struct dentry *dentry, struct inode *inode) unsigned short rec_len, name_len; struct page *page = NULL; struct ufs_dir_entry *de; - unsigned long npages = ufs_dir_pages(dir); + unsigned long npages = dir_pages(dir); unsigned long n; char *kaddr; loff_t pos; @@ -437,7 +434,7 @@ ufs_readdir(struct file *file, struct dir_context *ctx) struct super_block *sb = inode->i_sb; unsigned int offset = pos & ~PAGE_CACHE_MASK; unsigned long n = pos >> PAGE_CACHE_SHIFT; - unsigned long npages = ufs_dir_pages(inode); + unsigned long npages = dir_pages(inode); unsigned chunk_mask = ~(UFS_SB(sb)->s_uspi->s_dirblksize - 1); int need_revalidate = file->f_version != inode->i_version; unsigned flags = UFS_SB(sb)->s_flags; @@ -608,7 +605,7 @@ int ufs_empty_dir(struct inode * inode) { struct super_block *sb = inode->i_sb; struct page *page = NULL; - unsigned long i, npages = ufs_dir_pages(inode); + unsigned long i, npages = dir_pages(inode); for (i = 0; i < npages; i++) { char *kaddr; diff --git a/fs/ufs/ialloc.c b/fs/ufs/ialloc.c index 7caa016..fd0203c 100644 --- a/fs/ufs/ialloc.c +++ b/fs/ufs/ialloc.c @@ -69,11 +69,11 @@ void ufs_free_inode (struct inode * inode) ino = inode->i_ino; - lock_ufs(sb); + mutex_lock(&UFS_SB(sb)->s_lock); if (!((ino > 1) && (ino < (uspi->s_ncg * uspi->s_ipg )))) { ufs_warning(sb, "ufs_free_inode", "reserved inode or nonexistent inode %u\n", ino); - unlock_ufs(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); return; } @@ -81,7 +81,7 @@ void ufs_free_inode (struct inode * inode) bit = ufs_inotocgoff (ino); ucpi = ufs_load_cylinder (sb, cg); if (!ucpi) { - unlock_ufs(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); return; } ucg = ubh_get_ucg(UCPI_UBH(ucpi)); @@ -115,7 +115,7 @@ void ufs_free_inode (struct inode * inode) ubh_sync_block(UCPI_UBH(ucpi)); ufs_mark_sb_dirty(sb); - unlock_ufs(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); UFSD("EXIT\n"); } @@ -193,7 +193,7 @@ struct inode *ufs_new_inode(struct inode *dir, umode_t mode) sbi = UFS_SB(sb); uspi = sbi->s_uspi; - lock_ufs(sb); + mutex_lock(&sbi->s_lock); /* * Try to place the inode in its parent directory @@ -331,21 +331,21 @@ cg_found: sync_dirty_buffer(bh); brelse(bh); } - unlock_ufs(sb); + mutex_unlock(&sbi->s_lock); UFSD("allocating inode %lu\n", inode->i_ino); UFSD("EXIT\n"); return inode; fail_remove_inode: - unlock_ufs(sb); + mutex_unlock(&sbi->s_lock); clear_nlink(inode); unlock_new_inode(inode); iput(inode); UFSD("EXIT (FAILED): err %d\n", err); return ERR_PTR(err); failed: - unlock_ufs(sb); + mutex_unlock(&sbi->s_lock); make_bad_inode(inode); iput (inode); UFSD("EXIT (FAILED): err %d\n", err); diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c index 99aaf5c..f913a69 100644 --- a/fs/ufs/inode.c +++ b/fs/ufs/inode.c @@ -903,6 +903,9 @@ void ufs_evict_inode(struct inode * inode) invalidate_inode_buffers(inode); clear_inode(inode); - if (want_delete) + if (want_delete) { + lock_ufs(inode->i_sb); ufs_free_inode(inode); + unlock_ufs(inode->i_sb); + } } diff --git a/fs/ufs/namei.c b/fs/ufs/namei.c index f773deb..4796655 100644 --- a/fs/ufs/namei.c +++ b/fs/ufs/namei.c @@ -56,11 +56,9 @@ static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, unsi if (dentry->d_name.len > UFS_MAXNAMLEN) return ERR_PTR(-ENAMETOOLONG); - lock_ufs(dir->i_sb); ino = ufs_inode_by_name(dir, &dentry->d_name); if (ino) inode = ufs_iget(dir->i_sb, ino); - unlock_ufs(dir->i_sb); return d_splice_alias(inode, dentry); } @@ -76,24 +74,16 @@ static int ufs_create (struct inode * dir, struct dentry * dentry, umode_t mode, bool excl) { struct inode *inode; - int err; - - UFSD("BEGIN\n"); inode = ufs_new_inode(dir, mode); - err = PTR_ERR(inode); + if (IS_ERR(inode)) + return PTR_ERR(inode); - if (!IS_ERR(inode)) { - inode->i_op = &ufs_file_inode_operations; - inode->i_fop = &ufs_file_operations; - inode->i_mapping->a_ops = &ufs_aops; - mark_inode_dirty(inode); - lock_ufs(dir->i_sb); - err = ufs_add_nondir(dentry, inode); - unlock_ufs(dir->i_sb); - } - UFSD("END: err=%d\n", err); - return err; + inode->i_op = &ufs_file_inode_operations; + inode->i_fop = &ufs_file_operations; + inode->i_mapping->a_ops = &ufs_aops; + mark_inode_dirty(inode); + return ufs_add_nondir(dentry, inode); } static int ufs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) @@ -110,9 +100,7 @@ static int ufs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev init_special_inode(inode, mode, rdev); ufs_set_inode_dev(inode->i_sb, UFS_I(inode), rdev); mark_inode_dirty(inode); - lock_ufs(dir->i_sb); err = ufs_add_nondir(dentry, inode); - unlock_ufs(dir->i_sb); } return err; } @@ -121,19 +109,18 @@ static int ufs_symlink (struct inode * dir, struct dentry * dentry, const char * symname) { struct super_block * sb = dir->i_sb; - int err = -ENAMETOOLONG; + int err; unsigned l = strlen(symname)+1; struct inode * inode; if (l > sb->s_blocksize) - goto out_notlocked; + return -ENAMETOOLONG; inode = ufs_new_inode(dir, S_IFLNK | S_IRWXUGO); err = PTR_ERR(inode); if (IS_ERR(inode)) - goto out_notlocked; + return err; - lock_ufs(dir->i_sb); if (l > UFS_SB(sb)->s_uspi->s_maxsymlinklen) { /* slow symlink */ inode->i_op = &ufs_symlink_inode_operations; @@ -150,17 +137,13 @@ static int ufs_symlink (struct inode * dir, struct dentry * dentry, } mark_inode_dirty(inode); - err = ufs_add_nondir(dentry, inode); -out: - unlock_ufs(dir->i_sb); -out_notlocked: - return err; + return ufs_add_nondir(dentry, inode); out_fail: inode_dec_link_count(inode); unlock_new_inode(inode); iput(inode); - goto out; + return err; } static int ufs_link (struct dentry * old_dentry, struct inode * dir, @@ -169,14 +152,16 @@ static int ufs_link (struct dentry * old_dentry, struct inode * dir, struct inode *inode = d_inode(old_dentry); int error; - lock_ufs(dir->i_sb); - inode->i_ctime = CURRENT_TIME_SEC; inode_inc_link_count(inode); ihold(inode); - error = ufs_add_nondir(dentry, inode); - unlock_ufs(dir->i_sb); + error = ufs_add_link(dentry, inode); + if (error) { + inode_dec_link_count(inode); + iput(inode); + } else + d_instantiate(dentry, inode); return error; } @@ -185,9 +170,12 @@ static int ufs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode) struct inode * inode; int err; + inode_inc_link_count(dir); + inode = ufs_new_inode(dir, S_IFDIR|mode); + err = PTR_ERR(inode); if (IS_ERR(inode)) - return PTR_ERR(inode); + goto out_dir; inode->i_op = &ufs_dir_inode_operations; inode->i_fop = &ufs_dir_operations; @@ -195,9 +183,6 @@ static int ufs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode) inode_inc_link_count(inode); - lock_ufs(dir->i_sb); - inode_inc_link_count(dir); - err = ufs_make_empty(inode, dir); if (err) goto out_fail; @@ -205,20 +190,19 @@ static int ufs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode) err = ufs_add_link(dentry, inode); if (err) goto out_fail; - unlock_ufs(dir->i_sb); + unlock_new_inode(inode); d_instantiate(dentry, inode); -out: - return err; + return 0; out_fail: inode_dec_link_count(inode); inode_dec_link_count(inode); unlock_new_inode(inode); iput (inode); +out_dir: inode_dec_link_count(dir); - unlock_ufs(dir->i_sb); - goto out; + return err; } static int ufs_unlink(struct inode *dir, struct dentry *dentry) @@ -248,7 +232,6 @@ static int ufs_rmdir (struct inode * dir, struct dentry *dentry) struct inode * inode = d_inode(dentry); int err= -ENOTEMPTY; - lock_ufs(dir->i_sb); if (ufs_empty_dir (inode)) { err = ufs_unlink(dir, dentry); if (!err) { @@ -257,7 +240,6 @@ static int ufs_rmdir (struct inode * dir, struct dentry *dentry) inode_dec_link_count(dir); } } - unlock_ufs(dir->i_sb); return err; } @@ -295,7 +277,7 @@ static int ufs_rename(struct inode *old_dir, struct dentry *old_dentry, new_de = ufs_find_entry(new_dir, &new_dentry->d_name, &new_page); if (!new_de) goto out_dir; - ufs_set_link(new_dir, new_de, new_page, old_inode); + ufs_set_link(new_dir, new_de, new_page, old_inode, 1); new_inode->i_ctime = CURRENT_TIME_SEC; if (dir_de) drop_nlink(new_inode); @@ -318,7 +300,12 @@ static int ufs_rename(struct inode *old_dir, struct dentry *old_dentry, mark_inode_dirty(old_inode); if (dir_de) { - ufs_set_link(old_inode, dir_de, dir_page, new_dir); + if (old_dir != new_dir) + ufs_set_link(old_inode, dir_de, dir_page, new_dir, 0); + else { + kunmap(dir_page); + page_cache_release(dir_page); + } inode_dec_link_count(old_dir); } return 0; diff --git a/fs/ufs/super.c b/fs/ufs/super.c index 098508a..250579a 100644 --- a/fs/ufs/super.c +++ b/fs/ufs/super.c @@ -695,6 +695,7 @@ static int ufs_sync_fs(struct super_block *sb, int wait) unsigned flags; lock_ufs(sb); + mutex_lock(&UFS_SB(sb)->s_lock); UFSD("ENTER\n"); @@ -712,6 +713,7 @@ static int ufs_sync_fs(struct super_block *sb, int wait) ufs_put_cstotal(sb); UFSD("EXIT\n"); + mutex_unlock(&UFS_SB(sb)->s_lock); unlock_ufs(sb); return 0; @@ -800,6 +802,7 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent) UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); mutex_init(&sbi->mutex); + mutex_init(&sbi->s_lock); spin_lock_init(&sbi->work_lock); INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); /* @@ -1278,6 +1281,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) sync_filesystem(sb); lock_ufs(sb); + mutex_lock(&UFS_SB(sb)->s_lock); uspi = UFS_SB(sb)->s_uspi; flags = UFS_SB(sb)->s_flags; usb1 = ubh_get_usb_first(uspi); @@ -1291,6 +1295,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) new_mount_opt = 0; ufs_set_opt (new_mount_opt, ONERROR_LOCK); if (!ufs_parse_options (data, &new_mount_opt)) { + mutex_unlock(&UFS_SB(sb)->s_lock); unlock_ufs(sb); return -EINVAL; } @@ -1298,12 +1303,14 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) new_mount_opt |= ufstype; } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { pr_err("ufstype can't be changed during remount\n"); + mutex_unlock(&UFS_SB(sb)->s_lock); unlock_ufs(sb); return -EINVAL; } if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { UFS_SB(sb)->s_mount_opt = new_mount_opt; + mutex_unlock(&UFS_SB(sb)->s_lock); unlock_ufs(sb); return 0; } @@ -1327,6 +1334,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) */ #ifndef CONFIG_UFS_FS_WRITE pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); + mutex_unlock(&UFS_SB(sb)->s_lock); unlock_ufs(sb); return -EINVAL; #else @@ -1336,11 +1344,13 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && ufstype != UFS_MOUNT_UFSTYPE_UFS2) { pr_err("this ufstype is read-only supported\n"); + mutex_unlock(&UFS_SB(sb)->s_lock); unlock_ufs(sb); return -EINVAL; } if (!ufs_read_cylinder_structures(sb)) { pr_err("failed during remounting\n"); + mutex_unlock(&UFS_SB(sb)->s_lock); unlock_ufs(sb); return -EPERM; } @@ -1348,6 +1358,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) #endif } UFS_SB(sb)->s_mount_opt = new_mount_opt; + mutex_unlock(&UFS_SB(sb)->s_lock); unlock_ufs(sb); return 0; } diff --git a/fs/ufs/ufs.h b/fs/ufs/ufs.h index 2a07396..2e31ea2 100644 --- a/fs/ufs/ufs.h +++ b/fs/ufs/ufs.h @@ -30,6 +30,7 @@ struct ufs_sb_info { int work_queued; /* non-zero if the delayed work is queued */ struct delayed_work sync_work; /* FS sync delayed work */ spinlock_t work_lock; /* protects sync_work and work_queued */ + struct mutex s_lock; }; struct ufs_inode_info { @@ -105,7 +106,7 @@ extern int ufs_delete_entry(struct inode *, struct ufs_dir_entry *, struct page extern int ufs_empty_dir (struct inode *); extern struct ufs_dir_entry *ufs_dotdot(struct inode *, struct page **); extern void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de, - struct page *page, struct inode *inode); + struct page *page, struct inode *inode, bool update_times); /* file.c */ extern const struct inode_operations ufs_file_inode_operations; diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 874507d..f0e8249 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -577,6 +577,13 @@ restart: if (error) return error; + /* For changing security info in file_remove_privs() we need i_mutex */ + if (*iolock == XFS_IOLOCK_SHARED && !IS_NOSEC(inode)) { + xfs_rw_iunlock(ip, *iolock); + *iolock = XFS_IOLOCK_EXCL; + xfs_rw_ilock(ip, *iolock); + goto restart; + } /* * If the offset is beyond the size of the file, we need to zero any * blocks that fall between the existing EOF and the start of this @@ -637,7 +644,9 @@ restart: * setgid bits if the process is not being run by root. This keeps * people from modifying setuid and setgid binaries. */ - return file_remove_suid(file); + if (!IS_NOSEC(inode)) + return file_remove_privs(file); + return 0; } /* |
