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| author | Chuck Lever <chuck.lever@oracle.com> | 2024-02-17 21:23:47 +0100 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2024-02-21 09:34:25 +0100 |
| commit | 7beea725a8ca412c6190090ce7c3a13b169592a1 (patch) | |
| tree | 429796849356348d0976abc578a6612641a64d48 /fs/libfs.c | |
| parent | libfs: Re-arrange locking in offset_iterate_dir() (diff) | |
| download | linux-7beea725a8ca412c6190090ce7c3a13b169592a1.tar.xz linux-7beea725a8ca412c6190090ce7c3a13b169592a1.zip | |
libfs: Define a minimum directory offset
This value is used in several places, so make it a symbolic
constant.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Link: https://lore.kernel.org/r/170820142741.6328.12428356024575347885.stgit@91.116.238.104.host.secureserver.net
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs/libfs.c')
| -rw-r--r-- | fs/libfs.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/fs/libfs.c b/fs/libfs.c index 752e24c669d9..f0045db739df 100644 --- a/fs/libfs.c +++ b/fs/libfs.c @@ -240,6 +240,11 @@ const struct inode_operations simple_dir_inode_operations = { }; EXPORT_SYMBOL(simple_dir_inode_operations); +/* 0 is '.', 1 is '..', so always start with offset 2 or more */ +enum { + DIR_OFFSET_MIN = 2, +}; + static void offset_set(struct dentry *dentry, u32 offset) { dentry->d_fsdata = (void *)((uintptr_t)(offset)); @@ -261,9 +266,7 @@ void simple_offset_init(struct offset_ctx *octx) { xa_init_flags(&octx->xa, XA_FLAGS_ALLOC1); lockdep_set_class(&octx->xa.xa_lock, &simple_offset_xa_lock); - - /* 0 is '.', 1 is '..', so always start with offset 2 */ - octx->next_offset = 2; + octx->next_offset = DIR_OFFSET_MIN; } /** @@ -276,7 +279,7 @@ void simple_offset_init(struct offset_ctx *octx) */ int simple_offset_add(struct offset_ctx *octx, struct dentry *dentry) { - static const struct xa_limit limit = XA_LIMIT(2, U32_MAX); + static const struct xa_limit limit = XA_LIMIT(DIR_OFFSET_MIN, U32_MAX); u32 offset; int ret; @@ -481,7 +484,7 @@ static int offset_readdir(struct file *file, struct dir_context *ctx) return 0; /* In this case, ->private_data is protected by f_pos_lock */ - if (ctx->pos == 2) + if (ctx->pos == DIR_OFFSET_MIN) file->private_data = NULL; else if (file->private_data == ERR_PTR(-ENOENT)) return 0; |