Construct share_access value from O_DENY* flags and send it to the server.
Signed-off-by: Pavel Shilovsky piastry@etersoft.ru --- fs/cifs/cifsfs.c | 2 +- fs/cifs/cifsglob.h | 16 +++++++++++++++- fs/cifs/dir.c | 3 +++ fs/cifs/file.c | 4 ++++ fs/locks.c | 7 ++++++- include/linux/fs.h | 1 + 6 files changed, 30 insertions(+), 3 deletions(-)
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index e328339..469dffb 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -769,7 +769,7 @@ struct file_system_type cifs_fs_type = { .name = "cifs", .mount = cifs_do_mount, .kill_sb = cifs_kill_sb, - /* .fs_flags */ + .fs_flags = FS_DOES_SHARELOCK, }; const struct inode_operations cifs_dir_inode_ops = { .create = cifs_create, diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index cd4bbf3..7e876b9 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -465,7 +465,7 @@ struct smb_vol { CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
#define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \ - MS_NODEV | MS_SYNCHRONOUS) + MS_NODEV | MS_SYNCHRONOUS | MS_SHARELOCK)
struct cifs_mnt_data { struct cifs_sb_info *cifs_sb; @@ -947,6 +947,20 @@ struct cifsFileInfo { struct work_struct oplock_break; /* work for oplock breaks */ };
+static inline int +cifs_get_share_flags(unsigned int flags) +{ + int share_access = 0; + + if (!(flags & O_DENYREAD)) + share_access |= FILE_SHARE_READ; + if (!(flags & O_DENYWRITE)) + share_access |= FILE_SHARE_WRITE; + if (!(flags & O_DENYDELETE)) + share_access |= FILE_SHARE_DELETE; + return share_access; +} + struct cifs_io_parms { __u16 netfid; #ifdef CONFIG_CIFS_SMB2 diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c index 267b608..d4331de 100644 --- a/fs/cifs/dir.c +++ b/fs/cifs/dir.c @@ -294,6 +294,9 @@ cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid, else cFYI(1, "Create flag not set in create function");
+ if (IS_SHARELOCK(inode)) + share_access = cifs_get_share_flags(oflags); + /* * BB add processing to set equivalent of mode - e.g. via CreateX with * ACLs diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 0d524a7..9394b2b 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -210,6 +210,8 @@ cifs_nt_open(char *full_path, struct inode *inode, struct cifs_sb_info *cifs_sb, *********************************************************************/
disposition = cifs_get_disposition(f_flags); + if (IS_SHARELOCK(inode)) + share_access = cifs_get_share_flags(f_flags);
/* BB pass O_SYNC flag through on file attributes .. BB */
@@ -645,6 +647,8 @@ cifs_reopen_file(struct cifsFileInfo *cfile, bool can_flush) }
desired_access = cifs_convert_flags(cfile->f_flags); + if (IS_SHARELOCK(inode)) + share_access = cifs_get_share_flags(cfile->f_flags);
if (backup_cred(cifs_sb)) create_options |= CREATE_OPEN_BACKUP_INTENT; diff --git a/fs/locks.c b/fs/locks.c index 1eccc75..52c9ea1 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -846,8 +846,13 @@ deny_lock_file(struct file *filp) { struct file_lock *lock; int error = 0; + struct inode *inode = filp->f_path.dentry->d_inode;
- if (!IS_SHARELOCK(filp->f_path.dentry->d_inode)) + if (!IS_SHARELOCK(inode)) + return error; + + /* Don't set a lock on file systems that do it internally */ + if (inode->i_sb->s_type->fs_flags & FS_DOES_SHARELOCK) return error;
error = flock_make_lock(filp, &lock, deny_flags_to_cmd(filp->f_flags)); diff --git a/include/linux/fs.h b/include/linux/fs.h index 073e31a..8a4232e 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1816,6 +1816,7 @@ struct file_system_type { #define FS_USERNS_DEV_MOUNT 16 /* A userns mount does not imply MNT_NODEV */ #define FS_REVAL_DOT 16384 /* Check the paths ".", ".." for staleness */ #define FS_RENAME_DOES_D_MOVE 32768 /* FS will handle d_move() during rename() internally. */ +#define FS_DOES_SHARELOCK 65536 /* FS does sharelocks internally */ struct dentry *(*mount) (struct file_system_type *, int, const char *, void *); void (*kill_sb) (struct super_block *);