From: Kirill Smelkov kirr@nexedi.com

Using scripts/coccinelle/api/stream_open.cocci added in 10dce8af3422 ("fs: stream_open - opener for stream-like files so that read and write can run simultaneously without deadlock"), search and convert to stream_open all in-kernel nonseekable_open users for which read and write actually do not depend on ppos and where there is no other methods in file_operations which assume @offset access.

I've verified each generated change manually - that it is correct to convert - and each other nonseekable_open instance left - that it is either not correct to convert there, or that it is not converted due to current stream_open.cocci limitations.

One can also recheck/review the patch via generating it with explanation comments included via

$ make coccicheck MODE=patch COCCI=scripts/coccinelle/api/stream_open.cocci SPFLAGS="-D explain"

Signed-off-by: Kirill Smelkov kirr@nexedi.com [sven@narfation.org: added compat code] Signed-off-by: Sven Eckelmann sven@narfation.org --- This change is already upstream https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id... --- compat-include/linux/fs.h | 11 +++++++++++ net/batman-adv/icmp_socket.c | 2 +- net/batman-adv/log.c | 2 +- 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/compat-include/linux/fs.h b/compat-include/linux/fs.h index c52e0e8e..480722f0 100644 --- a/compat-include/linux/fs.h +++ b/compat-include/linux/fs.h @@ -31,4 +31,15 @@ static inline struct dentry *batadv_file_dentry(const struct file *file)

#endif /* < KERNEL_VERSION(4, 6, 0) */

+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 2, 0) + +static inline int batadv_stream_open(struct inode *inode, struct file *filp) +{ + return nonseekable_open(inode, filp); +} + +#define stream_open batadv_stream_open + +#endif /* < KERNEL_VERSION(5, 2, 0) */ + #endif /* _NET_BATMAN_ADV_COMPAT_LINUX_FS_H_ */ diff --git a/net/batman-adv/icmp_socket.c b/net/batman-adv/icmp_socket.c index de81b5ec..0a91c866 100644 --- a/net/batman-adv/icmp_socket.c +++ b/net/batman-adv/icmp_socket.c @@ -65,7 +65,7 @@ static int batadv_socket_open(struct inode *inode, struct file *file)

batadv_debugfs_deprecated(file, "");

- nonseekable_open(inode, file); + stream_open(inode, file);

socket_client = kmalloc(sizeof(*socket_client), GFP_KERNEL); if (!socket_client) { diff --git a/net/batman-adv/log.c b/net/batman-adv/log.c index 60ce11e1..f79ebd5b 100644 --- a/net/batman-adv/log.c +++ b/net/batman-adv/log.c @@ -90,7 +90,7 @@ static int batadv_log_open(struct inode *inode, struct file *file) batadv_debugfs_deprecated(file, "Use tracepoint batadv:batadv_dbg instead\n");

- nonseekable_open(inode, file); + stream_open(inode, file); file->private_data = inode->i_private; return 0; }