Messages in this thread Patch in this message | | | From | chenchacha <> | Subject | [PATCH 2/2] Add a new function to get root directory with ATTR_VOLUME | Date | Fri, 5 Oct 2018 01:21:01 +0800 |
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Signed-off-by: chenchacha <chen.chenchacha@foxmail.com> --- fs/fat/dir.c | 13 +++++++++++++ fs/fat/fat.h | 2 ++ 2 files changed, 15 insertions(+)
diff --git a/fs/fat/dir.c b/fs/fat/dir.c index 7f5f3699fc6c..4fdcc1200f2b 100644 --- a/fs/fat/dir.c +++ b/fs/fat/dir.c @@ -881,6 +881,19 @@ static int fat_get_short_entry(struct inode *dir, loff_t *pos, return -ENOENT; } +int fat_get_root_entry(struct inode *dir, struct buffer_head **bh, + struct msdos_dir_entry **de) +{ + loff_t offset = 0; + + *de = NULL; + while (fat_get_entry(dir, &offset, bh, de) >= 0) { + if (!IS_FREE((*de)->name) && (*de)->attr & ATTR_VOLUME) + return 0; + } + return -ENOENT; +} + /* * The ".." entry can not provide the "struct fat_slot_info" information * for inode, nor a usable i_pos. So, this function provides some information diff --git a/fs/fat/fat.h b/fs/fat/fat.h index be012de96f65..4195cb1e891a 100644 --- a/fs/fat/fat.h +++ b/fs/fat/fat.h @@ -302,6 +302,8 @@ extern int fat_scan(struct inode *dir, const unsigned char *name, struct fat_slot_info *sinfo); extern int fat_scan_logstart(struct inode *dir, int i_logstart, struct fat_slot_info *sinfo); +extern int fat_get_root_entry(struct inode *dir, struct buffer_head **bh, + struct msdos_dir_entry **de); extern int fat_get_dotdot_entry(struct inode *dir, struct buffer_head **bh, struct msdos_dir_entry **de); extern int fat_alloc_new_dir(struct inode *dir, struct timespec64 *ts); -- 2.19.0
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