Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/hch/vfs...

[pandora-kernel.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 277f497..14493a2 100644 (file)
--- 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);