1 files changed, 23 insertions, 13 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 277f497923a2..14493a2d5a03 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -58,14 +58,15 @@ struct inodes_stat_t {
 
 #define NR_FILE  8192   /* this can well be larger on a larger system */
 
-#define MAY_EXEC 1
-#define MAY_WRITE 2
-#define MAY_READ 4
-#define MAY_APPEND 8
-#define MAY_ACCESS 16
-#define MAY_OPEN 32
-#define MAY_CHDIR 64
-#define MAY_NOT_BLOCK 128       /* called from RCU mode, don't block */
+#define MAY_EXEC                0x00000001
+#define MAY_WRITE               0x00000002
+#define MAY_READ                0x00000004
+#define MAY_APPEND              0x00000008
+#define MAY_ACCESS              0x00000010
+#define MAY_OPEN                0x00000020
+#define MAY_CHDIR               0x00000040
+/* called from RCU mode, don't block */
+#define MAY_NOT_BLOCK           0x00000080
 
 /*
  * flags in file.f_mode.  Note that FMODE_READ and FMODE_WRITE must correspond
@@ -963,7 +964,12 @@ struct file {
 #define f_dentry        f_path.dentry
 #define f_vfsmnt        f_path.mnt
         const struct file_operations    *f_op;
-        spinlock_t              f_lock;  /* f_ep_links, f_flags, no IRQ */
+
+        /*
+         * Protects f_ep_links, f_flags, f_pos vs i_size in lseek SEEK_CUR.
+         * Must not be taken from IRQ context.
+         */
+        spinlock_t              f_lock;
 #ifdef CONFIG_SMP
         int                     f_sb_list_cpu;
 #endif
@@ -1063,6 +1069,8 @@ static inline int file_check_writeable(struct file *filp)
 #define FL_LEASE        32      /* lease held on this file */
 #define FL_CLOSE        64      /* unlock on close */
 #define FL_SLEEP        128     /* A blocking lock */
+#define FL_DOWNGRADE_PENDING    256 /* Lease is being downgraded */
+#define FL_UNLOCK_PENDING       512 /* Lease is being broken */
 
 /*
  * Special return value from posix_lock_file() and vfs_lock_file() for
@@ -1109,7 +1117,7 @@ struct file_lock {
         struct list_head fl_link;       /* doubly linked list of all locks */
         struct list_head fl_block;      /* circular list of blocked processes */
         fl_owner_t fl_owner;
-        unsigned char fl_flags;
+        unsigned int fl_flags;
         unsigned char fl_type;
         unsigned int fl_pid;
         struct pid *fl_nspid;
@@ -1119,7 +1127,9 @@ struct file_lock {
         loff_t fl_end;
 
         struct fasync_struct *  fl_fasync; /* for lease break notifications */
-        unsigned long fl_break_time;    /* for nonblocking lease breaks */
+        /* for lease breaks: */
+        unsigned long fl_break_time;
+        unsigned long fl_downgrade_time;
 
         const struct file_lock_operations *fl_ops;      /* Callbacks for filesystems */
         const struct lock_manager_operations *fl_lmops; /* Callbacks for lockmanagers */
@@ -2397,8 +2407,8 @@ file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping);
 extern loff_t noop_llseek(struct file *file, loff_t offset, int origin);
 extern loff_t no_llseek(struct file *file, loff_t offset, int origin);
 extern loff_t generic_file_llseek(struct file *file, loff_t offset, int origin);
-extern loff_t generic_file_llseek_unlocked(struct file *file, loff_t offset,
-                        int origin);
+extern loff_t generic_file_llseek_size(struct file *file, loff_t offset,
+                int origin, loff_t maxsize);
 extern int generic_file_open(struct inode * inode, struct file * filp);
 extern int nonseekable_open(struct inode * inode, struct file * filp);