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authorAl Viro <viro@zeniv.linux.org.uk>2022-08-16 17:57:56 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2022-08-17 23:25:04 +0200
commit25885a35a72007cf28ec5f9ba7169c5c798f7167 (patch)
tree948589bcdf9420b67123d83eab2cf7f7d8bdbcf8 /fs/ocfs2/journal.c
parentlocks: fix TOCTOU race when granting write lease (diff)
downloadlinux-25885a35a72007cf28ec5f9ba7169c5c798f7167.tar.xz
linux-25885a35a72007cf28ec5f9ba7169c5c798f7167.zip
Change calling conventions for filldir_t
filldir_t instances (directory iterators callbacks) used to return 0 for "OK, keep going" or -E... for "stop". Note that it's *NOT* how the error values are reported - the rules for those are callback-dependent and ->iterate{,_shared}() instances only care about zero vs. non-zero (look at emit_dir() and friends). So let's just return bool ("should we keep going?") - it's less confusing that way. The choice between "true means keep going" and "true means stop" is bikesheddable; we have two groups of callbacks - do something for everything in directory, until we run into problem and find an entry in directory and do something to it. The former tended to use 0/-E... conventions - -E<something> on failure. The latter tended to use 0/1, 1 being "stop, we are done". The callers treated anything non-zero as "stop", ignoring which non-zero value did they get. "true means stop" would be more natural for the second group; "true means keep going" - for the first one. I tried both variants and the things like if allocation failed something = -ENOMEM; return true; just looked unnatural and asking for trouble. [folded suggestion from Matthew Wilcox <willy@infradead.org>] Acked-by: Christian Brauner (Microsoft) <brauner@kernel.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/ocfs2/journal.c')
-rw-r--r--fs/ocfs2/journal.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index fa87d89cf754..126671e6caed 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -2057,7 +2057,7 @@ struct ocfs2_orphan_filldir_priv {
enum ocfs2_orphan_reco_type orphan_reco_type;
};
-static int ocfs2_orphan_filldir(struct dir_context *ctx, const char *name,
+static bool ocfs2_orphan_filldir(struct dir_context *ctx, const char *name,
int name_len, loff_t pos, u64 ino,
unsigned type)
{
@@ -2066,21 +2066,21 @@ static int ocfs2_orphan_filldir(struct dir_context *ctx, const char *name,
struct inode *iter;
if (name_len == 1 && !strncmp(".", name, 1))
- return 0;
+ return true;
if (name_len == 2 && !strncmp("..", name, 2))
- return 0;
+ return true;
/* do not include dio entry in case of orphan scan */
if ((p->orphan_reco_type == ORPHAN_NO_NEED_TRUNCATE) &&
(!strncmp(name, OCFS2_DIO_ORPHAN_PREFIX,
OCFS2_DIO_ORPHAN_PREFIX_LEN)))
- return 0;
+ return true;
/* Skip bad inodes so that recovery can continue */
iter = ocfs2_iget(p->osb, ino,
OCFS2_FI_FLAG_ORPHAN_RECOVERY, 0);
if (IS_ERR(iter))
- return 0;
+ return true;
if (!strncmp(name, OCFS2_DIO_ORPHAN_PREFIX,
OCFS2_DIO_ORPHAN_PREFIX_LEN))
@@ -2090,7 +2090,7 @@ static int ocfs2_orphan_filldir(struct dir_context *ctx, const char *name,
* happen concurrently with unlink/rename */
if (OCFS2_I(iter)->ip_next_orphan) {
iput(iter);
- return 0;
+ return true;
}
trace_ocfs2_orphan_filldir((unsigned long long)OCFS2_I(iter)->ip_blkno);
@@ -2099,7 +2099,7 @@ static int ocfs2_orphan_filldir(struct dir_context *ctx, const char *name,
OCFS2_I(iter)->ip_next_orphan = p->head;
p->head = iter;
- return 0;
+ return true;
}
static int ocfs2_queue_orphans(struct ocfs2_super *osb,