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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-05 08:50:26 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-05 08:50:26 -0700 |
commit | 45d9a2220f6004b47c362cc7fc7cf9a73cb6353a (patch) | |
tree | 4e2217464c5cd71674a6ffff1f3dddaeb52556b7 /fs/nilfs2 | |
parent | 2386a3b0fbb0c2dcf29694c7df9a72cb268458f0 (diff) | |
parent | 02afc27faec94c9e068517a22acf55400976c698 (diff) | |
download | linux-next-45d9a2220f6004b47c362cc7fc7cf9a73cb6353a.tar.gz |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs pile 1 from Al Viro:
"Unfortunately, this merge window it'll have a be a lot of small piles -
my fault, actually, for not keeping #for-next in anything that would
resemble a sane shape ;-/
This pile: assorted fixes (the first 3 are -stable fodder, IMO) and
cleanups + %pd/%pD formats (dentry/file pathname, up to 4 last
components) + several long-standing patches from various folks.
There definitely will be a lot more (starting with Miklos'
check_submount_and_drop() series)"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (26 commits)
direct-io: Handle O_(D)SYNC AIO
direct-io: Implement generic deferred AIO completions
add formats for dentry/file pathnames
kvm eventfd: switch to fdget
powerpc kvm: use fdget
switch fchmod() to fdget
switch epoll_ctl() to fdget
switch copy_module_from_fd() to fdget
git simplify nilfs check for busy subtree
ibmasmfs: don't bother passing superblock when not needed
don't pass superblock to hypfs_{mkdir,create*}
don't pass superblock to hypfs_diag_create_files
don't pass superblock to hypfs_vm_create_files()
oprofile: get rid of pointless forward declarations of struct super_block
oprofilefs_create_...() do not need superblock argument
oprofilefs_mkdir() doesn't need superblock argument
don't bother with passing superblock to oprofile_create_stats_files()
oprofile: don't bother with passing superblock to ->create_files()
don't bother passing sb to oprofile_create_files()
coh901318: don't open-code simple_read_from_buffer()
...
Diffstat (limited to 'fs/nilfs2')
-rw-r--r-- | fs/nilfs2/super.c | 26 |
1 files changed, 7 insertions, 19 deletions
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index af3ba0478cdf..7ac2a122ca1d 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -994,23 +994,16 @@ static int nilfs_attach_snapshot(struct super_block *s, __u64 cno, return ret; } -static int nilfs_tree_was_touched(struct dentry *root_dentry) -{ - return d_count(root_dentry) > 1; -} - /** - * nilfs_try_to_shrink_tree() - try to shrink dentries of a checkpoint + * nilfs_tree_is_busy() - try to shrink dentries of a checkpoint * @root_dentry: root dentry of the tree to be shrunk * * This function returns true if the tree was in-use. */ -static int nilfs_try_to_shrink_tree(struct dentry *root_dentry) +static bool nilfs_tree_is_busy(struct dentry *root_dentry) { - if (have_submounts(root_dentry)) - return true; shrink_dcache_parent(root_dentry); - return nilfs_tree_was_touched(root_dentry); + return d_count(root_dentry) > 1; } int nilfs_checkpoint_is_mounted(struct super_block *sb, __u64 cno) @@ -1034,8 +1027,7 @@ int nilfs_checkpoint_is_mounted(struct super_block *sb, __u64 cno) if (inode) { dentry = d_find_alias(inode); if (dentry) { - if (nilfs_tree_was_touched(dentry)) - ret = nilfs_try_to_shrink_tree(dentry); + ret = nilfs_tree_is_busy(dentry); dput(dentry); } iput(inode); @@ -1331,11 +1323,8 @@ nilfs_mount(struct file_system_type *fs_type, int flags, s->s_flags |= MS_ACTIVE; } else if (!sd.cno) { - int busy = false; - - if (nilfs_tree_was_touched(s->s_root)) { - busy = nilfs_try_to_shrink_tree(s->s_root); - if (busy && (flags ^ s->s_flags) & MS_RDONLY) { + if (nilfs_tree_is_busy(s->s_root)) { + if ((flags ^ s->s_flags) & MS_RDONLY) { printk(KERN_ERR "NILFS: the device already " "has a %s mount.\n", (s->s_flags & MS_RDONLY) ? @@ -1343,8 +1332,7 @@ nilfs_mount(struct file_system_type *fs_type, int flags, err = -EBUSY; goto failed_super; } - } - if (!busy) { + } else { /* * Try remount to setup mount states if the current * tree is not mounted and only snapshots use this sb. |