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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-23 05:27:56 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-23 05:28:34 +0400 |
| commit | 94bc891b00e40cbec375feb4568780af183fd7f4 (patch) | |
| tree | fd48d354c61d2e736aa593c324a6d794afd8a4e7 /fs/seq_file.c | |
| parent | 934b7024f0ed29003c95cef447d92737ab86dc4f (diff) | |
| parent | 1ec7f1ddbe5ba49f7b10c3b129d6d5c90c43526c (diff) | |
| download | linux-94bc891b00e40cbec375feb4568780af183fd7f4.tar.xz | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
[PATCH] get rid of __exit_files(), __exit_fs() and __put_fs_struct()
[PATCH] proc_readfd_common() race fix
[PATCH] double-free of inode on alloc_file() failure exit in create_write_pipe()
[PATCH] teach seq_file to discard entries
[PATCH] umount_tree() will unhash everything itself
[PATCH] get rid of more nameidata passing in namespace.c
[PATCH] switch a bunch of LSM hooks from nameidata to path
[PATCH] lock exclusively in collect_mounts() and drop_collected_mounts()
[PATCH] move a bunch of declarations to fs/internal.h
Diffstat (limited to 'fs/seq_file.c')
| -rw-r--r-- | fs/seq_file.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/fs/seq_file.c b/fs/seq_file.c index 9943408b315e..cdfd996ca6ef 100644 --- a/fs/seq_file.c +++ b/fs/seq_file.c @@ -25,6 +25,7 @@ * into the buffer. In case of error ->start() and ->next() return * ERR_PTR(error). In the end of sequence they return %NULL. ->show() * returns 0 in case of success and negative number in case of error. + * Returning SEQ_SKIP means "discard this element and move on". */ int seq_open(struct file *file, const struct seq_operations *op) { @@ -114,8 +115,10 @@ ssize_t seq_read(struct file *file, char __user *buf, size_t size, loff_t *ppos) if (!p || IS_ERR(p)) break; err = m->op->show(m, p); - if (err) + if (err < 0) break; + if (unlikely(err)) + m->count = 0; if (m->count < m->size) goto Fill; m->op->stop(m, p); @@ -140,9 +143,10 @@ Fill: break; } err = m->op->show(m, p); - if (err || m->count == m->size) { + if (m->count == m->size || err) { m->count = offs; - break; + if (likely(err <= 0)) + break; } pos = next; } @@ -199,8 +203,12 @@ static int traverse(struct seq_file *m, loff_t offset) if (IS_ERR(p)) break; error = m->op->show(m, p); - if (error) + if (error < 0) break; + if (unlikely(error)) { + error = 0; + m->count = 0; + } if (m->count == m->size) goto Eoverflow; if (pos + m->count > offset) { |