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| author |   Al Viro <viro@zeniv.linux.org.uk> | 2019-10-31 01:21:58 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2019-11-15 13:49:04 -0500 |
| commit | 6c2d4798a8d16cf4f3a28c3cd4af4f1dcbbb4d04 (patch) | |
| tree | 2b14c83985da30129911f7ad455e4cc587690e58 /fs/dcache.c | |
| parent | fs/namei.c: pull positivity check into follow_managed() (diff) | |
| download | linux-dev-6c2d4798a8d16cf4f3a28c3cd4af4f1dcbbb4d04.tar.xz linux-dev-6c2d4798a8d16cf4f3a28c3cd4af4f1dcbbb4d04.zip | |
new helper: lookup_positive_unlocked()
Most of the callers of lookup_one_len_unlocked() treat negatives are
ERR_PTR(-ENOENT). Provide a helper that would do just that. Note
that a pinned positive dentry remains positive - it's ->d_inode is
stable, etc.; a pinned _negative_ dentry can become positive at any
point as long as you are not holding its parent at least shared.
So using lookup_one_len_unlocked() needs to be careful;
lookup_positive_unlocked() is safer and that's what the callers
end up open-coding anyway.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/dcache.c')
0 files changed, 0 insertions, 0 deletions