summaryrefslogtreecommitdiffstats
path: root/fs/locks.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/locks.c')
-rw-r--r--fs/locks.c117
1 files changed, 1 insertions, 116 deletions
diff --git a/fs/locks.c b/fs/locks.c
index 74b2a1dfe8d8..3d6fb4ae847b 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1397,103 +1397,6 @@ static int posix_lock_inode_wait(struct inode *inode, struct file_lock *fl)
return error;
}
-#ifdef CONFIG_MANDATORY_FILE_LOCKING
-/**
- * locks_mandatory_locked - Check for an active lock
- * @file: the file to check
- *
- * Searches the inode's list of locks to find any POSIX locks which conflict.
- * This function is called from locks_verify_locked() only.
- */
-int locks_mandatory_locked(struct file *file)
-{
- int ret;
- struct inode *inode = locks_inode(file);
- struct file_lock_context *ctx;
- struct file_lock *fl;
-
- ctx = smp_load_acquire(&inode->i_flctx);
- if (!ctx || list_empty_careful(&ctx->flc_posix))
- return 0;
-
- /*
- * Search the lock list for this inode for any POSIX locks.
- */
- spin_lock(&ctx->flc_lock);
- ret = 0;
- list_for_each_entry(fl, &ctx->flc_posix, fl_list) {
- if (fl->fl_owner != current->files &&
- fl->fl_owner != file) {
- ret = -EAGAIN;
- break;
- }
- }
- spin_unlock(&ctx->flc_lock);
- return ret;
-}
-
-/**
- * locks_mandatory_area - Check for a conflicting lock
- * @inode: the file to check
- * @filp: how the file was opened (if it was)
- * @start: first byte in the file to check
- * @end: lastbyte in the file to check
- * @type: %F_WRLCK for a write lock, else %F_RDLCK
- *
- * Searches the inode's list of locks to find any POSIX locks which conflict.
- */
-int locks_mandatory_area(struct inode *inode, struct file *filp, loff_t start,
- loff_t end, unsigned char type)
-{
- struct file_lock fl;
- int error;
- bool sleep = false;
-
- locks_init_lock(&fl);
- fl.fl_pid = current->tgid;
- fl.fl_file = filp;
- fl.fl_flags = FL_POSIX | FL_ACCESS;
- if (filp && !(filp->f_flags & O_NONBLOCK))
- sleep = true;
- fl.fl_type = type;
- fl.fl_start = start;
- fl.fl_end = end;
-
- for (;;) {
- if (filp) {
- fl.fl_owner = filp;
- fl.fl_flags &= ~FL_SLEEP;
- error = posix_lock_inode(inode, &fl, NULL);
- if (!error)
- break;
- }
-
- if (sleep)
- fl.fl_flags |= FL_SLEEP;
- fl.fl_owner = current->files;
- error = posix_lock_inode(inode, &fl, NULL);
- if (error != FILE_LOCK_DEFERRED)
- break;
- error = wait_event_interruptible(fl.fl_wait,
- list_empty(&fl.fl_blocked_member));
- if (!error) {
- /*
- * If we've been sleeping someone might have
- * changed the permissions behind our back.
- */
- if (__mandatory_lock(inode))
- continue;
- }
-
- break;
- }
- locks_delete_block(&fl);
-
- return error;
-}
-EXPORT_SYMBOL(locks_mandatory_area);
-#endif /* CONFIG_MANDATORY_FILE_LOCKING */
-
static void lease_clear_pending(struct file_lock *fl, int arg)
{
switch (arg) {
@@ -2486,14 +2389,6 @@ int fcntl_setlk(unsigned int fd, struct file *filp, unsigned int cmd,
if (file_lock == NULL)
return -ENOLCK;
- /* Don't allow mandatory locks on files that may be memory mapped
- * and shared.
- */
- if (mandatory_lock(inode) && mapping_writably_mapped(filp->f_mapping)) {
- error = -EAGAIN;
- goto out;
- }
-
error = flock_to_posix_lock(filp, file_lock, flock);
if (error)
goto out;
@@ -2611,21 +2506,12 @@ int fcntl_setlk64(unsigned int fd, struct file *filp, unsigned int cmd,
struct flock64 *flock)
{
struct file_lock *file_lock = locks_alloc_lock();
- struct inode *inode = locks_inode(filp);
struct file *f;
int error;
if (file_lock == NULL)
return -ENOLCK;
- /* Don't allow mandatory locks on files that may be memory mapped
- * and shared.
- */
- if (mandatory_lock(inode) && mapping_writably_mapped(filp->f_mapping)) {
- error = -EAGAIN;
- goto out;
- }
-
error = flock64_to_posix_lock(filp, file_lock, flock);
if (error)
goto out;
@@ -2857,8 +2743,7 @@ static void lock_get_status(struct seq_file *f, struct file_lock *fl,
seq_puts(f, "POSIX ");
seq_printf(f, " %s ",
- (inode == NULL) ? "*NOINODE*" :
- mandatory_lock(inode) ? "MANDATORY" : "ADVISORY ");
+ (inode == NULL) ? "*NOINODE*" : "ADVISORY ");
} else if (IS_FLOCK(fl)) {
if (fl->fl_type & LOCK_MAND) {
seq_puts(f, "FLOCK MSNFS ");