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ovl: use simpler function to convert iocb to rw flags

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Overlayfs implements its own function to translate iocb flags into rw
flags, so that they can be passed into another vfs call.

With commit ce71bfea207b4 ("fs: align IOCB_* flags with RWF_* flags")
Jens created a 1:1 matching between the iocb flags and rw flags,
simplifying the conversion.

Signed-off-by: Alessio Balsini <balsini@android.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
This commit is contained in:
Amir Goldstein 2023-09-06 10:52:13 +03:00
parent 14ab6d425e
commit db5b5e83ee
1 changed files with 11 additions and 17 deletions
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28
fs/overlayfs/file.c
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@ -263,20 +263,12 @@ static void ovl_file_accessed(struct file *file)
touch_atime(&file->f_path);
}
static rwf_t ovl_iocb_to_rwf(int ifl)
#define OVL_IOCB_MASK \
(IOCB_NOWAIT | IOCB_HIPRI | IOCB_DSYNC | IOCB_SYNC)
static rwf_t iocb_to_rw_flags(int flags)
{
rwf_t flags = 0;
if (ifl & IOCB_NOWAIT)
flags |= RWF_NOWAIT;
if (ifl & IOCB_HIPRI)
flags |= RWF_HIPRI;
if (ifl & IOCB_DSYNC)
flags |= RWF_DSYNC;
if (ifl & IOCB_SYNC)
flags |= RWF_SYNC;
return flags;
return (__force rwf_t)(flags & OVL_IOCB_MASK);
}
static inline void ovl_aio_put(struct ovl_aio_req *aio_req)
@ -334,8 +326,9 @@ static ssize_t ovl_read_iter(struct kiocb *iocb, struct iov_iter *iter)
old_cred = ovl_override_creds(file_inode(file)->i_sb);
if (is_sync_kiocb(iocb)) {
ret = vfs_iter_read(real.file, iter, &iocb->ki_pos,
ovl_iocb_to_rwf(iocb->ki_flags));
rwf_t rwf = iocb_to_rw_flags(iocb->ki_flags);
ret = vfs_iter_read(real.file, iter, &iocb->ki_pos, rwf);
} else {
struct ovl_aio_req *aio_req;
@ -401,9 +394,10 @@ static ssize_t ovl_write_iter(struct kiocb *iocb, struct iov_iter *iter)
old_cred = ovl_override_creds(file_inode(file)->i_sb);
if (is_sync_kiocb(iocb)) {
rwf_t rwf = iocb_to_rw_flags(ifl);
file_start_write(real.file);
ret = vfs_iter_write(real.file, iter, &iocb->ki_pos,
ovl_iocb_to_rwf(ifl));
ret = vfs_iter_write(real.file, iter, &iocb->ki_pos, rwf);
file_end_write(real.file);
/* Update size */
ovl_copyattr(inode);