Use f_lock to protect f_flags

[deliverable/linux.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 6022f44043f2a01305bb09564c82d78bd08ad006..7428c6d35e6504312fcb7fec85e0db6552917708 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -54,24 +54,30 @@ struct inodes_stat_t {
 #define MAY_ACCESS 16
 #define MAY_OPEN 32
 
+/*
+ * flags in file.f_mode.  Note that FMODE_READ and FMODE_WRITE must correspond
+ * to O_WRONLY and O_RDWR via the strange trick in __dentry_open()
+ */
+
 /* file is open for reading */
 #define FMODE_READ             ((__force fmode_t)1)
 /* file is open for writing */
 #define FMODE_WRITE            ((__force fmode_t)2)
 /* file is seekable */
 #define FMODE_LSEEK            ((__force fmode_t)4)
-/* file can be accessed using pread/pwrite */
+/* file can be accessed using pread */
 #define FMODE_PREAD            ((__force fmode_t)8)
-#define FMODE_PWRITE           FMODE_PREAD     /* These go hand in hand */
+/* file can be accessed using pwrite */
+#define FMODE_PWRITE           ((__force fmode_t)16)
 /* File is opened for execution with sys_execve / sys_uselib */
-#define FMODE_EXEC             ((__force fmode_t)16)
+#define FMODE_EXEC             ((__force fmode_t)32)
 /* File is opened with O_NDELAY (only set for block devices) */
-#define FMODE_NDELAY           ((__force fmode_t)32)
+#define FMODE_NDELAY           ((__force fmode_t)64)
 /* File is opened with O_EXCL (only set for block devices) */
-#define FMODE_EXCL             ((__force fmode_t)64)
+#define FMODE_EXCL             ((__force fmode_t)128)
 /* File is opened using open(.., 3, ..) and is writeable only for ioctls
    (specialy hack for floppy.c) */
-#define FMODE_WRITE_IOCTL      ((__force fmode_t)128)
+#define FMODE_WRITE_IOCTL      ((__force fmode_t)256)
 
 /*
  * Don't update ctime and mtime.
@@ -87,10 +93,10 @@ struct inodes_stat_t {
 #define WRITE 1
 #define READA 2                /* read-ahead  - don't block if no resources */
 #define SWRITE 3       /* for ll_rw_block() - wait for buffer lock */
-#define READ_SYNC      (READ | (1 << BIO_RW_SYNC))
+#define READ_SYNC      (READ | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG))
 #define READ_META      (READ | (1 << BIO_RW_META))
-#define WRITE_SYNC     (WRITE | (1 << BIO_RW_SYNC))
-#define SWRITE_SYNC    (SWRITE | (1 << BIO_RW_SYNC))
+#define WRITE_SYNC     (WRITE | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG))
+#define SWRITE_SYNC    (SWRITE | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG))
 #define WRITE_BARRIER  (WRITE | (1 << BIO_RW_BARRIER))
 #define DISCARD_NOBARRIER (1 << BIO_RW_DISCARD)
 #define DISCARD_BARRIER ((1 << BIO_RW_DISCARD) | (1 << BIO_RW_BARRIER))
@@ -842,6 +848,7 @@ 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 */
        atomic_long_t           f_count;
        unsigned int            f_flags;
        fmode_t                 f_mode;
@@ -860,7 +867,6 @@ struct file {
 #ifdef CONFIG_EPOLL
        /* Used by fs/eventpoll.c to link all the hooks to this file */
        struct list_head        f_ep_links;
-       spinlock_t              f_ep_lock;
 #endif /* #ifdef CONFIG_EPOLL */
        struct address_space    *f_mapping;
 #ifdef CONFIG_DEBUG_WRITECOUNT