filesystem freeze: add error handling of write_super_lockfs/unlockfs

[linux-2.6-omap-h63xx.git] / Documentation / filesystems / Locking

diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 23d2f4460debf2122676e83a6d4c9139df889253..ec6a9392a1738317cdd8042fcd2f418865072396 100644 (file)
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -97,8 +97,8 @@ prototypes:
        void (*put_super) (struct super_block *);
        void (*write_super) (struct super_block *);
        int (*sync_fs)(struct super_block *sb, int wait);
-       void (*write_super_lockfs) (struct super_block *);
-       void (*unlockfs) (struct super_block *);
+       int (*freeze_fs) (struct super_block *);
+       int (*unfreeze_fs) (struct super_block *);
        int (*statfs) (struct dentry *, struct kstatfs *);
        int (*remount_fs) (struct super_block *, int *, char *);
        void (*clear_inode) (struct inode *);
@@ -119,8 +119,8 @@ delete_inode:               no
 put_super:             yes     yes     no
 write_super:           no      yes     read
 sync_fs:               no      no      read
-write_super_lockfs:    ?
-unlockfs:              ?
+freeze_fs:             ?
+unfreeze_fs:           ?
 statfs:                        no      no      no
 remount_fs:            yes     yes     maybe           (see below)
 clear_inode:           no
@@ -394,11 +394,10 @@ prototypes:
        unsigned long (*get_unmapped_area)(struct file *, unsigned long,
                        unsigned long, unsigned long, unsigned long);
        int (*check_flags)(int);
-       int (*dir_notify)(struct file *, unsigned long);
 };
 
 locking rules:
-       All except ->poll() may block.
+       All may block.
                        BKL
 llseek:                        no      (see below)
 read:                  no
@@ -424,7 +423,6 @@ sendfile:           no
 sendpage:              no
 get_unmapped_area:     no
 check_flags:           no
-dir_notify:            no
 
 ->llseek() locking has moved from llseek to the individual llseek
 implementations.  If your fs is not using generic_file_llseek, you