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f2fs: allocate trace path buffer from names_cache

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It would be better to use the dedicated slab to store path.

Signed-off-by: Wu Bo <bo.wu@vivo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Wu Bo 2023-04-14 18:43:08 +08:00 committed by Jaegeuk Kim
parent c1660d88a0
commit 5584785080
2 changed files with 15 additions and 2 deletions
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13
fs/f2fs/f2fs.h
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@ -3347,6 +3347,19 @@ static inline void *f2fs_kmalloc(struct f2fs_sb_info *sbi,
return kmalloc(size, flags); return kmalloc(size, flags);
} }
static inline void *f2fs_getname(struct f2fs_sb_info *sbi)
{
if (time_to_inject(sbi, FAULT_KMALLOC))
return NULL;
return __getname();
}
static inline void f2fs_putname(char *buf)
{
__putname(buf);
}
static inline void *f2fs_kzalloc(struct f2fs_sb_info *sbi, static inline void *f2fs_kzalloc(struct f2fs_sb_info *sbi,
size_t size, gfp_t flags) size_t size, gfp_t flags)
{ {

4
fs/f2fs/file.c
View File

@ -4372,7 +4372,7 @@ static void f2fs_trace_rw_file_path(struct kiocb *iocb, size_t count, int rw)
struct inode *inode = file_inode(iocb->ki_filp); struct inode *inode = file_inode(iocb->ki_filp);
char *buf, *path; char *buf, *path;
buf = f2fs_kmalloc(F2FS_I_SB(inode), PATH_MAX, GFP_KERNEL); buf = f2fs_getname(F2FS_I_SB(inode));
if (!buf) if (!buf)
return; return;
path = dentry_path_raw(file_dentry(iocb->ki_filp), buf, PATH_MAX); path = dentry_path_raw(file_dentry(iocb->ki_filp), buf, PATH_MAX);
@ -4385,7 +4385,7 @@ static void f2fs_trace_rw_file_path(struct kiocb *iocb, size_t count, int rw)
trace_f2fs_dataread_start(inode, iocb->ki_pos, count, trace_f2fs_dataread_start(inode, iocb->ki_pos, count,
current->pid, path, current->comm); current->pid, path, current->comm);
free_buf: free_buf:
kfree(buf); f2fs_putname(buf);
} }
static ssize_t f2fs_file_read_iter(struct kiocb *iocb, struct iov_iter *to) static ssize_t f2fs_file_read_iter(struct kiocb *iocb, struct iov_iter *to)