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Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband
[linux-2.6-microblaze.git] / fs / cifs / cifsfs.c
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 2a13a2b..d4b713e 100644 (file)
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -93,13 +93,10 @@ cifs_read_super(struct super_block *sb, void *data,
        int rc = 0;
 
        sb->s_flags |= MS_NODIRATIME; /* and probably even noatime */
        int rc = 0;
 
        sb->s_flags |= MS_NODIRATIME; /* and probably even noatime */
-       sb->s_fs_info = kmalloc(sizeof(struct cifs_sb_info),GFP_KERNEL);
+       sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info),GFP_KERNEL);
        cifs_sb = CIFS_SB(sb);
        if(cifs_sb == NULL)
                return -ENOMEM;
        cifs_sb = CIFS_SB(sb);
        if(cifs_sb == NULL)
                return -ENOMEM;
-       else
-               memset(cifs_sb,0,sizeof(struct cifs_sb_info));
-       
 
        rc = cifs_mount(sb, cifs_sb, data, devname);
 
 
        rc = cifs_mount(sb, cifs_sb, data, devname);
 
@@ -479,7 +476,7 @@ cifs_get_sb(struct file_system_type *fs_type,
 
        sb->s_flags = flags;
 
 
        sb->s_flags = flags;
 
-       rc = cifs_read_super(sb, data, dev_name, flags & MS_VERBOSE ? 1 : 0);
+       rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
        if (rc) {
                up_write(&sb->s_umount);
                deactivate_super(sb);
        if (rc) {
                up_write(&sb->s_umount);
                deactivate_super(sb);
@@ -513,6 +510,17 @@ static ssize_t cifs_file_aio_write(struct kiocb *iocb, const char __user *buf,
        return written;
 }
 
        return written;
 }
 
+static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
+{
+       /* origin == SEEK_END => we must revalidate the cached file length */
+       if (origin == 2) {
+               int retval = cifs_revalidate(file->f_dentry);
+               if (retval < 0)
+                       return (loff_t)retval;
+       }
+       return remote_llseek(file, offset, origin);
+}
+
 static struct file_system_type cifs_fs_type = {
        .owner = THIS_MODULE,
        .name = "cifs",
 static struct file_system_type cifs_fs_type = {
        .owner = THIS_MODULE,
        .name = "cifs",
@@ -572,7 +580,7 @@ struct inode_operations cifs_symlink_inode_ops = {
 #endif 
 };
 
 #endif 
 };
 
-struct file_operations cifs_file_ops = {
+const struct file_operations cifs_file_ops = {
        .read = do_sync_read,
        .write = do_sync_write,
        .readv = generic_file_readv,
        .read = do_sync_read,
        .write = do_sync_write,
        .readv = generic_file_readv,
@@ -586,6 +594,7 @@ struct file_operations cifs_file_ops = {
        .flush = cifs_flush,
        .mmap  = cifs_file_mmap,
        .sendfile = generic_file_sendfile,
        .flush = cifs_flush,
        .mmap  = cifs_file_mmap,
        .sendfile = generic_file_sendfile,
+       .llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_POSIX
        .ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
 #ifdef CONFIG_CIFS_POSIX
        .ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
@@ -595,7 +604,7 @@ struct file_operations cifs_file_ops = {
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 
-struct file_operations cifs_file_direct_ops = {
+const struct file_operations cifs_file_direct_ops = {
        /* no mmap, no aio, no readv - 
           BB reevaluate whether they can be done with directio, no cache */
        .read = cifs_user_read,
        /* no mmap, no aio, no readv - 
           BB reevaluate whether they can be done with directio, no cache */
        .read = cifs_user_read,
@@ -609,12 +618,12 @@ struct file_operations cifs_file_direct_ops = {
 #ifdef CONFIG_CIFS_POSIX
        .ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
 #ifdef CONFIG_CIFS_POSIX
        .ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
-
+       .llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_EXPERIMENTAL
        .dir_notify = cifs_dir_notify,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 #ifdef CONFIG_CIFS_EXPERIMENTAL
        .dir_notify = cifs_dir_notify,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
-struct file_operations cifs_file_nobrl_ops = {
+const struct file_operations cifs_file_nobrl_ops = {
        .read = do_sync_read,
        .write = do_sync_write,
        .readv = generic_file_readv,
        .read = do_sync_read,
        .write = do_sync_write,
        .readv = generic_file_readv,
@@ -627,6 +636,7 @@ struct file_operations cifs_file_nobrl_ops = {
        .flush = cifs_flush,
        .mmap  = cifs_file_mmap,
        .sendfile = generic_file_sendfile,
        .flush = cifs_flush,
        .mmap  = cifs_file_mmap,
        .sendfile = generic_file_sendfile,
+       .llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_POSIX
        .ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
 #ifdef CONFIG_CIFS_POSIX
        .ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
@@ -636,7 +646,7 @@ struct file_operations cifs_file_nobrl_ops = {
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 
-struct file_operations cifs_file_direct_nobrl_ops = {
+const struct file_operations cifs_file_direct_nobrl_ops = {
        /* no mmap, no aio, no readv - 
           BB reevaluate whether they can be done with directio, no cache */
        .read = cifs_user_read,
        /* no mmap, no aio, no readv - 
           BB reevaluate whether they can be done with directio, no cache */
        .read = cifs_user_read,
@@ -649,13 +659,13 @@ struct file_operations cifs_file_direct_nobrl_ops = {
 #ifdef CONFIG_CIFS_POSIX
        .ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
 #ifdef CONFIG_CIFS_POSIX
        .ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
-
+       .llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_EXPERIMENTAL
        .dir_notify = cifs_dir_notify,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 
 #ifdef CONFIG_CIFS_EXPERIMENTAL
        .dir_notify = cifs_dir_notify,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 
-struct file_operations cifs_dir_ops = {
+const struct file_operations cifs_dir_ops = {
        .readdir = cifs_readdir,
        .release = cifs_closedir,
        .read    = generic_read_dir,
        .readdir = cifs_readdir,
        .release = cifs_closedir,
        .read    = generic_read_dir,
@@ -682,7 +692,8 @@ cifs_init_inodecache(void)
 {
        cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
                                              sizeof (struct cifsInodeInfo),
 {
        cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
                                              sizeof (struct cifsInodeInfo),
-                                             0, SLAB_RECLAIM_ACCOUNT,
+                                             0, (SLAB_RECLAIM_ACCOUNT|
+                                               SLAB_MEM_SPREAD),
                                              cifs_init_once, NULL);
        if (cifs_inode_cachep == NULL)
                return -ENOMEM;
                                              cifs_init_once, NULL);
        if (cifs_inode_cachep == NULL)
                return -ENOMEM;
@@ -724,16 +735,14 @@ cifs_init_request_bufs(void)
                cERROR(1,("cifs_min_rcv set to maximum (64)"));
        }
 
                cERROR(1,("cifs_min_rcv set to maximum (64)"));
        }
 
-       cifs_req_poolp = mempool_create(cifs_min_rcv,
-                                       mempool_alloc_slab,
-                                       mempool_free_slab,
-                                       cifs_req_cachep);
+       cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
+                                                 cifs_req_cachep);
 
        if(cifs_req_poolp == NULL) {
                kmem_cache_destroy(cifs_req_cachep);
                return -ENOMEM;
        }
 
        if(cifs_req_poolp == NULL) {
                kmem_cache_destroy(cifs_req_cachep);
                return -ENOMEM;
        }
-       /* 256 (MAX_CIFS_HDR_SIZE bytes is enough for most SMB responses and
+       /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
        almost all handle based requests (but not write response, nor is it
        sufficient for path based requests).  A smaller size would have
        been more efficient (compacting multiple slab items on one 4k page) 
        almost all handle based requests (but not write response, nor is it
        sufficient for path based requests).  A smaller size would have
        been more efficient (compacting multiple slab items on one 4k page) 
@@ -742,7 +751,8 @@ cifs_init_request_bufs(void)
        efficient to alloc 1 per page off the slab compared to 17K (5page) 
        alloc of large cifs buffers even when page debugging is on */
        cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
        efficient to alloc 1 per page off the slab compared to 17K (5page) 
        alloc of large cifs buffers even when page debugging is on */
        cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
-                       MAX_CIFS_HDR_SIZE, 0, SLAB_HWCACHE_ALIGN, NULL, NULL);
+                       MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, 
+                       NULL, NULL);
        if (cifs_sm_req_cachep == NULL) {
                mempool_destroy(cifs_req_poolp);
                kmem_cache_destroy(cifs_req_cachep);
        if (cifs_sm_req_cachep == NULL) {
                mempool_destroy(cifs_req_poolp);
                kmem_cache_destroy(cifs_req_cachep);
@@ -756,10 +766,8 @@ cifs_init_request_bufs(void)
                cFYI(1,("cifs_min_small set to maximum (256)"));
        }
 
                cFYI(1,("cifs_min_small set to maximum (256)"));
        }
 
-       cifs_sm_req_poolp = mempool_create(cifs_min_small,
-                               mempool_alloc_slab,
-                               mempool_free_slab,
-                               cifs_sm_req_cachep);
+       cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
+                                                    cifs_sm_req_cachep);
 
        if(cifs_sm_req_poolp == NULL) {
                mempool_destroy(cifs_req_poolp);
 
        if(cifs_sm_req_poolp == NULL) {
                mempool_destroy(cifs_req_poolp);
@@ -793,10 +801,8 @@ cifs_init_mids(void)
        if (cifs_mid_cachep == NULL)
                return -ENOMEM;
 
        if (cifs_mid_cachep == NULL)
                return -ENOMEM;
 
-       cifs_mid_poolp = mempool_create(3 /* a reasonable min simultan opers */,
-                                       mempool_alloc_slab,
-                                       mempool_free_slab,
-                                       cifs_mid_cachep);
+       /* 3 is a reasonable minimum number of simultaneous operations */
+       cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
        if(cifs_mid_poolp == NULL) {
                kmem_cache_destroy(cifs_mid_cachep);
                return -ENOMEM;
        if(cifs_mid_poolp == NULL) {
                kmem_cache_destroy(cifs_mid_cachep);
                return -ENOMEM;
@@ -860,9 +866,9 @@ static int cifs_oplock_thread(void * dummyarg)
                                DeleteOplockQEntry(oplock_item);
                                /* can not grab inode sem here since it would
                                deadlock when oplock received on delete 
                                DeleteOplockQEntry(oplock_item);
                                /* can not grab inode sem here since it would
                                deadlock when oplock received on delete 
-                               since vfs_unlink holds the i_sem across
+                               since vfs_unlink holds the i_mutex across
                                the call */
                                the call */
-                               /* down(&inode->i_sem);*/
+                               /* mutex_lock(&inode->i_mutex);*/
                                if (S_ISREG(inode->i_mode)) {
                                        rc = filemap_fdatawrite(inode->i_mapping);
                                        if(CIFS_I(inode)->clientCanCacheRead == 0) {
                                if (S_ISREG(inode->i_mode)) {
                                        rc = filemap_fdatawrite(inode->i_mapping);
                                        if(CIFS_I(inode)->clientCanCacheRead == 0) {
@@ -871,7 +877,7 @@ static int cifs_oplock_thread(void * dummyarg)
                                        }
                                } else
                                        rc = 0;
                                        }
                                } else
                                        rc = 0;
-                               /* up(&inode->i_sem);*/
+                               /* mutex_unlock(&inode->i_mutex);*/
                                if (rc)
                                        CIFS_I(inode)->write_behind_rc = rc;
                                cFYI(1,("Oplock flush inode %p rc %d",inode,rc));
                                if (rc)
                                        CIFS_I(inode)->write_behind_rc = rc;
                                cFYI(1,("Oplock flush inode %p rc %d",inode,rc));
@@ -954,6 +960,12 @@ init_cifs(void)
        atomic_set(&tconInfoReconnectCount, 0);
 
        atomic_set(&bufAllocCount, 0);
        atomic_set(&tconInfoReconnectCount, 0);
 
        atomic_set(&bufAllocCount, 0);
+       atomic_set(&smBufAllocCount, 0);
+#ifdef CONFIG_CIFS_STATS2
+       atomic_set(&totBufAllocCount, 0);
+       atomic_set(&totSmBufAllocCount, 0);
+#endif /* CONFIG_CIFS_STATS2 */
+
        atomic_set(&midCount, 0);
        GlobalCurrentXid = 0;
        GlobalTotalActiveXid = 0;
        atomic_set(&midCount, 0);
        GlobalCurrentXid = 0;
        GlobalTotalActiveXid = 0;
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