diff options
| author | Amir Goldstein <amir73il@gmail.com> | 2023-11-22 14:27:09 +0200 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2023-11-24 10:09:51 +0100 |
| commit | 269aed7014b3db9acdbc5a5e163d8a6c62e0e770 (patch) | |
| tree | 1bf919e07ef620de322af867dc20b0fc671b33ac /fs | |
| parent | e389b76a7ee1b62392ab52c22f9ba81f23145824 (diff) | |
fs: move file_start_write() into vfs_iter_write()
All the callers of vfs_iter_write() call file_start_write() just before
calling vfs_iter_write() except for target_core_file's fd_do_rw().
Move file_start_write() from the callers into vfs_iter_write().
fd_do_rw() calls vfs_iter_write() with a non-regular file, so
file_start_write() is a no-op.
This is needed for fanotify "pre content" events.
Suggested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Link: https://lore.kernel.org/r/20231122122715.2561213-11-amir73il@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/coda/file.c | 2 | ||||
| -rw-r--r-- | fs/nfsd/vfs.c | 2 | ||||
| -rw-r--r-- | fs/overlayfs/file.c | 2 | ||||
| -rw-r--r-- | fs/read_write.c | 13 |
4 files changed, 10 insertions, 9 deletions
diff --git a/fs/coda/file.c b/fs/coda/file.c index e62315c37386..148856a582a9 100644 --- a/fs/coda/file.c +++ b/fs/coda/file.c @@ -80,12 +80,10 @@ coda_file_write_iter(struct kiocb *iocb, struct iov_iter *to) goto finish_write; inode_lock(coda_inode); - file_start_write(host_file); ret = vfs_iter_write(cfi->cfi_container, to, &iocb->ki_pos, 0); coda_inode->i_size = file_inode(host_file)->i_size; coda_inode->i_blocks = (coda_inode->i_size + 511) >> 9; inode_set_mtime_to_ts(coda_inode, inode_set_ctime_current(coda_inode)); - file_end_write(host_file); inode_unlock(coda_inode); finish_write: diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 5d704461e3b4..35c9546b3396 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1186,9 +1186,7 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfsd_file *nf, since = READ_ONCE(file->f_wb_err); if (verf) nfsd_copy_write_verifier(verf, nn); - file_start_write(file); host_err = vfs_iter_write(file, &iter, &pos, flags); - file_end_write(file); if (host_err < 0) { commit_reset_write_verifier(nn, rqstp, host_err); goto out_nfserr; diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c index 131621daeb13..690b173f34fc 100644 --- a/fs/overlayfs/file.c +++ b/fs/overlayfs/file.c @@ -436,9 +436,7 @@ static ssize_t ovl_write_iter(struct kiocb *iocb, struct iov_iter *iter) 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, rwf); - file_end_write(real.file); /* Update size */ ovl_file_modified(file); } else { diff --git a/fs/read_write.c b/fs/read_write.c index 4771701c896b..3aa3bce18075 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -839,7 +839,7 @@ ssize_t vfs_iter_read(struct file *file, struct iov_iter *iter, loff_t *ppos, EXPORT_SYMBOL(vfs_iter_read); static ssize_t do_iter_write(struct file *file, struct iov_iter *iter, - loff_t *pos, rwf_t flags) + loff_t *pos, rwf_t flags) { size_t tot_len; ssize_t ret = 0; @@ -894,11 +894,18 @@ ssize_t vfs_iocb_iter_write(struct file *file, struct kiocb *iocb, EXPORT_SYMBOL(vfs_iocb_iter_write); ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos, - rwf_t flags) + rwf_t flags) { + int ret; + if (!file->f_op->write_iter) return -EINVAL; - return do_iter_write(file, iter, ppos, flags); + + file_start_write(file); + ret = do_iter_write(file, iter, ppos, flags); + file_end_write(file); + + return ret; } EXPORT_SYMBOL(vfs_iter_write); |