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author | Al Viro <viro@zeniv.linux.org.uk> | 2013-05-16 00:49:12 +0200 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-06-29 10:46:47 +0200 |
commit | bb6f619b3a49f940d7478112500da312d70866eb (patch) | |
tree | 4e17d6ed5b965eaec2e55b11b61145b200d28f0f /fs/coda | |
parent | [readdir] introduce iterate_dir() and dir_context (diff) | |
download | linux-bb6f619b3a49f940d7478112500da312d70866eb.tar.xz linux-bb6f619b3a49f940d7478112500da312d70866eb.zip |
[readdir] introduce ->iterate(), ctx->pos, dir_emit()
New method - ->iterate(file, ctx). That's the replacement for ->readdir();
it takes callback from ctx->actor, uses ctx->pos instead of file->f_pos and
calls dir_emit(ctx, ...) instead of filldir(data, ...). It does *not*
update file->f_pos (or look at it, for that matter); iterate_dir() does the
update.
Note that dir_emit() takes the offset from ctx->pos (and eventually
filldir_t will lose that argument).
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/coda')
-rw-r--r-- | fs/coda/dir.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/fs/coda/dir.c b/fs/coda/dir.c index b7d3a05c062c..fc66861b3598 100644 --- a/fs/coda/dir.c +++ b/fs/coda/dir.c @@ -391,8 +391,7 @@ static int coda_readdir(struct file *coda_file, void *buf, filldir_t filldir) if (!host_file->f_op) return -ENOTDIR; - if (host_file->f_op->readdir) - { + if (host_file->f_op->readdir) { /* potemkin case: we were handed a directory inode. * We can't use vfs_readdir because we have to keep the file * position in sync between the coda_file and the host_file. @@ -410,8 +409,20 @@ static int coda_readdir(struct file *coda_file, void *buf, filldir_t filldir) coda_file->f_pos = host_file->f_pos; mutex_unlock(&host_inode->i_mutex); - } - else /* Venus: we must read Venus dirents from a file */ + } else if (host_file->f_op->iterate) { + struct inode *host_inode = file_inode(host_file); + struct dir_context *ctx = buf; + + mutex_lock(&host_inode->i_mutex); + ret = -ENOENT; + if (!IS_DEADDIR(host_inode)) { + ret = host_file->f_op->iterate(host_file, ctx); + file_accessed(host_file); + } + mutex_unlock(&host_inode->i_mutex); + + coda_file->f_pos = ctx->pos; + } else /* Venus: we must read Venus dirents from a file */ ret = coda_venus_readdir(coda_file, buf, filldir); return ret; |