Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 135 insertions, 86 deletions

diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 5a44811b5027..b3cc8586984e 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -17,7 +17,6 @@
 #include <linux/slab.h>
 #include <linux/nls.h>
 #include <linux/ctype.h>
-#include <linux/smp_lock.h>
 #include <linux/statfs.h>
 #include <linux/cdrom.h>
 #include <linux/parser.h>
@@ -27,16 +26,32 @@
 
 #define BEQUIET
 
-static int isofs_hashi(struct dentry *parent, struct qstr *qstr);
-static int isofs_hash(struct dentry *parent, struct qstr *qstr);
-static int isofs_dentry_cmpi(struct dentry *dentry, struct qstr *a, struct qstr *b);
-static int isofs_dentry_cmp(struct dentry *dentry, struct qstr *a, struct qstr *b);
+static int isofs_hashi(const struct dentry *parent, const struct inode *inode,
+                struct qstr *qstr);
+static int isofs_hash(const struct dentry *parent, const struct inode *inode,
+                struct qstr *qstr);
+static int isofs_dentry_cmpi(const struct dentry *parent,
+                const struct inode *pinode,
+                const struct dentry *dentry, const struct inode *inode,
+                unsigned int len, const char *str, const struct qstr *name);
+static int isofs_dentry_cmp(const struct dentry *parent,
+                const struct inode *pinode,
+                const struct dentry *dentry, const struct inode *inode,
+                unsigned int len, const char *str, const struct qstr *name);
 
 #ifdef CONFIG_JOLIET
-static int isofs_hashi_ms(struct dentry *parent, struct qstr *qstr);
-static int isofs_hash_ms(struct dentry *parent, struct qstr *qstr);
-static int isofs_dentry_cmpi_ms(struct dentry *dentry, struct qstr *a, struct qstr *b);
-static int isofs_dentry_cmp_ms(struct dentry *dentry, struct qstr *a, struct qstr *b);
+static int isofs_hashi_ms(const struct dentry *parent, const struct inode *inode,
+                struct qstr *qstr);
+static int isofs_hash_ms(const struct dentry *parent, const struct inode *inode,
+                struct qstr *qstr);
+static int isofs_dentry_cmpi_ms(const struct dentry *parent,
+                const struct inode *pinode,
+                const struct dentry *dentry, const struct inode *inode,
+                unsigned int len, const char *str, const struct qstr *name);
+static int isofs_dentry_cmp_ms(const struct dentry *parent,
+                const struct inode *pinode,
+                const struct dentry *dentry, const struct inode *inode,
+                unsigned int len, const char *str, const struct qstr *name);
 #endif
 
 static void isofs_put_super(struct super_block *sb)
@@ -44,11 +59,7 @@ static void isofs_put_super(struct super_block *sb)
         struct isofs_sb_info *sbi = ISOFS_SB(sb);
 
 #ifdef CONFIG_JOLIET
-        lock_kernel();
-
         unload_nls(sbi->s_nls_iocharset);
-
-        unlock_kernel();
 #endif
 
         kfree(sbi);
@@ -70,11 +81,18 @@ static struct inode *isofs_alloc_inode(struct super_block *sb)
         return &ei->vfs_inode;
 }
 
-static void isofs_destroy_inode(struct inode *inode)
+static void isofs_i_callback(struct rcu_head *head)
 {
+        struct inode *inode = container_of(head, struct inode, i_rcu);
+        INIT_LIST_HEAD(&inode->i_dentry);
         kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode));
 }
 
+static void isofs_destroy_inode(struct inode *inode)
+{
+        call_rcu(&inode->i_rcu, isofs_i_callback);
+}
+
 static void init_once(void *foo)
 {
         struct iso_inode_info *ei = foo;
@@ -165,7 +183,7 @@ struct iso9660_options{
  * Compute the hash for the isofs name corresponding to the dentry.
  */
 static int
-isofs_hash_common(struct dentry *dentry, struct qstr *qstr, int ms)
+isofs_hash_common(const struct dentry *dentry, struct qstr *qstr, int ms)
 {
         const char *name;
         int len;
@@ -186,7 +204,7 @@ isofs_hash_common(struct dentry *dentry, struct qstr *qstr, int ms)
  * Compute the hash for the isofs name corresponding to the dentry.
  */
 static int
-isofs_hashi_common(struct dentry *dentry, struct qstr *qstr, int ms)
+isofs_hashi_common(const struct dentry *dentry, struct qstr *qstr, int ms)
 {
         const char *name;
         int len;
@@ -211,100 +229,94 @@ isofs_hashi_common(struct dentry *dentry, struct qstr *qstr, int ms)
 }
 
 /*
- * Case insensitive compare of two isofs names.
- */
-static int isofs_dentry_cmpi_common(struct dentry *dentry, struct qstr *a,
-                                struct qstr *b, int ms)
-{
-        int alen, blen;
-
-        /* A filename cannot end in '.' or we treat it like it has none */
-        alen = a->len;
-        blen = b->len;
-        if (ms) {
-                while (alen && a->name[alen-1] == '.')
-                        alen--;
-                while (blen && b->name[blen-1] == '.')
-                        blen--;
-        }
-        if (alen == blen) {
-                if (strnicmp(a->name, b->name, alen) == 0)
-                        return 0;
-        }
-        return 1;
-}
-
-/*
- * Case sensitive compare of two isofs names.
+ * Compare of two isofs names.
  */
-static int isofs_dentry_cmp_common(struct dentry *dentry, struct qstr *a,
-                                        struct qstr *b, int ms)
+static int isofs_dentry_cmp_common(
+                unsigned int len, const char *str,
+                const struct qstr *name, int ms, int ci)
 {
         int alen, blen;
 
         /* A filename cannot end in '.' or we treat it like it has none */
-        alen = a->len;
-        blen = b->len;
+        alen = name->len;
+        blen = len;
         if (ms) {
-                while (alen && a->name[alen-1] == '.')
+                while (alen && name->name[alen-1] == '.')
                         alen--;
-                while (blen && b->name[blen-1] == '.')
+                while (blen && str[blen-1] == '.')
                         blen--;
         }
         if (alen == blen) {
-                if (strncmp(a->name, b->name, alen) == 0)
-                        return 0;
+                if (ci) {
+                        if (strnicmp(name->name, str, alen) == 0)
+                                return 0;
+                } else {
+                        if (strncmp(name->name, str, alen) == 0)
+                                return 0;
+                }
         }
         return 1;
 }
 
 static int
-isofs_hash(struct dentry *dentry, struct qstr *qstr)
+isofs_hash(const struct dentry *dentry, const struct inode *inode,
+                struct qstr *qstr)
 {
         return isofs_hash_common(dentry, qstr, 0);
 }
 
 static int
-isofs_hashi(struct dentry *dentry, struct qstr *qstr)
+isofs_hashi(const struct dentry *dentry, const struct inode *inode,
+                struct qstr *qstr)
 {
         return isofs_hashi_common(dentry, qstr, 0);
 }
 
 static int
-isofs_dentry_cmp(struct dentry *dentry,struct qstr *a,struct qstr *b)
+isofs_dentry_cmp(const struct dentry *parent, const struct inode *pinode,
+                const struct dentry *dentry, const struct inode *inode,
+                unsigned int len, const char *str, const struct qstr *name)
 {
-        return isofs_dentry_cmp_common(dentry, a, b, 0);
+        return isofs_dentry_cmp_common(len, str, name, 0, 0);
 }
 
 static int
-isofs_dentry_cmpi(struct dentry *dentry,struct qstr *a,struct qstr *b)
+isofs_dentry_cmpi(const struct dentry *parent, const struct inode *pinode,
+                const struct dentry *dentry, const struct inode *inode,
+                unsigned int len, const char *str, const struct qstr *name)
 {
-        return isofs_dentry_cmpi_common(dentry, a, b, 0);
+        return isofs_dentry_cmp_common(len, str, name, 0, 1);
 }
 
 #ifdef CONFIG_JOLIET
 static int
-isofs_hash_ms(struct dentry *dentry, struct qstr *qstr)
+isofs_hash_ms(const struct dentry *dentry, const struct inode *inode,
+                struct qstr *qstr)
 {
         return isofs_hash_common(dentry, qstr, 1);
 }
 
 static int
-isofs_hashi_ms(struct dentry *dentry, struct qstr *qstr)
+isofs_hashi_ms(const struct dentry *dentry, const struct inode *inode,
+                struct qstr *qstr)
 {
         return isofs_hashi_common(dentry, qstr, 1);
 }
 
 static int
-isofs_dentry_cmp_ms(struct dentry *dentry,struct qstr *a,struct qstr *b)
+isofs_dentry_cmp_ms(const struct dentry *parent, const struct inode *pinode,
+                const struct dentry *dentry, const struct inode *inode,
+                unsigned int len, const char *str, const struct qstr *name)
 {
-        return isofs_dentry_cmp_common(dentry, a, b, 1);
+        return isofs_dentry_cmp_common(len, str, name, 1, 0);
 }
 
 static int
-isofs_dentry_cmpi_ms(struct dentry *dentry,struct qstr *a,struct qstr *b)
+isofs_dentry_cmpi_ms(const struct dentry *parent, const struct inode *pinode,
+                const struct dentry *dentry, const struct inode *inode,
+                unsigned int len, const char *str, const struct qstr *name)
 {
-        return isofs_dentry_cmpi_common(dentry, a, b, 1);
+        return isofs_dentry_cmp_common(len, str, name, 1, 1);
 }
 #endif
 
@@ -549,6 +561,34 @@ static unsigned int isofs_get_last_session(struct super_block *sb, s32 session)
 }
 
 /*
+ * Check if root directory is empty (has less than 3 files).
+ *
+ * Used to detect broken CDs where ISO root directory is empty but Joliet root
+ * directory is OK. If such CD has Rock Ridge extensions, they will be disabled
+ * (and Joliet used instead) or else no files would be visible.
+ */
+static bool rootdir_empty(struct super_block *sb, unsigned long block)
+{
+        int offset = 0, files = 0, de_len;
+        struct iso_directory_record *de;
+        struct buffer_head *bh;
+
+        bh = sb_bread(sb, block);
+        if (!bh)
+                return true;
+        while (files < 3) {
+                de = (struct iso_directory_record *) (bh->b_data + offset);
+                de_len = *(unsigned char *) de;
+                if (de_len == 0)
+                        break;
+                files++;
+                offset += de_len;
+        }
+        brelse(bh);
+        return files < 3;
+}
+
+/*
  * Initialize the superblock and read the root inode.
  *
  * Note: a check_disk_change() has been done immediately prior
@@ -823,6 +863,7 @@ root_found:
         sbi->s_utf8 = opt.utf8;
         sbi->s_nocompress = opt.nocompress;
         sbi->s_overriderockperm = opt.overriderockperm;
+        mutex_init(&sbi->s_mutex);
         /*
          * It would be incredibly stupid to allow people to mark every file
          * on the disk as suid, so we merely allow them to set the default
@@ -847,6 +888,18 @@ root_found:
                 goto out_no_root;
 
         /*
+         * Fix for broken CDs with Rock Ridge and empty ISO root directory but
+         * correct Joliet root directory.
+         */
+        if (sbi->s_rock == 1 && joliet_level &&
+                                rootdir_empty(s, sbi->s_firstdatazone)) {
+                printk(KERN_NOTICE
+                        "ISOFS: primary root directory is empty. "
+                        "Disabling Rock Ridge and switching to Joliet.");
+                sbi->s_rock = 0;
+        }
+
+        /*
          * If this disk has both Rock Ridge and Joliet on it, then we
          * want to use Rock Ridge by default.  This can be overridden
          * by using the norock mount option.  There is still one other
@@ -886,17 +939,18 @@ root_found:
                 goto out_iput;
         }
 
-        /* get the root dentry */
-        s->s_root = d_alloc_root(inode);
-        if (!(s->s_root))
-                goto out_no_root;
-
         table = 0;
         if (joliet_level)
                 table += 2;
         if (opt.check == 'r')
                 table++;
-        s->s_root->d_op = &isofs_dentry_ops[table];
+
+        s->s_d_op = &isofs_dentry_ops[table];
+
+        /* get the root dentry */
+        s->s_root = d_alloc_root(inode);
+        if (!(s->s_root))
+                goto out_no_root;
 
         kfree(opt.iocharset);
 
@@ -920,7 +974,7 @@ out_no_inode:
 out_no_read:
         printk(KERN_WARNING "%s: bread failed, dev=%s, iso_blknum=%d, block=%d\n",
                 __func__, s->s_id, iso_blknum, block);
-        goto out_freesbi;
+        goto out_freebh;
 out_bad_zone_size:
         printk(KERN_WARNING "ISOFS: Bad logical zone size %ld\n",
                 sbi->s_log_zone_size);
@@ -935,6 +989,7 @@ out_unknown_format:
 
 out_freebh:
         brelse(bh);
+        brelse(pri_bh);
 out_freesbi:
         kfree(opt.iocharset);
         kfree(sbi);
@@ -966,27 +1021,23 @@ static int isofs_statfs (struct dentry *dentry, struct kstatfs *buf)
  * or getblk() if they are not.  Returns the number of blocks inserted
  * (-ve == error.)
  */
-int isofs_get_blocks(struct inode *inode, sector_t iblock_s,
+int isofs_get_blocks(struct inode *inode, sector_t iblock,
                      struct buffer_head **bh, unsigned long nblocks)
 {
-        unsigned long b_off;
+        unsigned long b_off = iblock;
         unsigned offset, sect_size;
         unsigned int firstext;
         unsigned long nextblk, nextoff;
-        long iblock = (long)iblock_s;
         int section, rv, error;
         struct iso_inode_info *ei = ISOFS_I(inode);
 
-        lock_kernel();
-
         error = -EIO;
         rv = 0;
-        if (iblock < 0 || iblock != iblock_s) {
+        if (iblock != b_off) {
                 printk(KERN_DEBUG "%s: block number too large\n", __func__);
                 goto abort;
         }
 
-        b_off = iblock;
 
         offset = 0;
         firstext = ei->i_first_extent;
@@ -1004,8 +1055,9 @@ int isofs_get_blocks(struct inode *inode, sector_t iblock_s,
                  * I/O errors.
                  */
                 if (b_off > ((inode->i_size + PAGE_CACHE_SIZE - 1) >> ISOFS_BUFFER_BITS(inode))) {
-                        printk(KERN_DEBUG "%s: block >= EOF (%ld, %ld)\n",
-                                __func__, iblock, (unsigned long) inode->i_size);
+                        printk(KERN_DEBUG "%s: block >= EOF (%lu, %llu)\n",
+                                __func__, b_off,
+                                (unsigned long long)inode->i_size);
                         goto abort;
                 }
 
@@ -1031,9 +1083,9 @@ int isofs_get_blocks(struct inode *inode, sector_t iblock_s,
                         if (++section > 100) {
                                 printk(KERN_DEBUG "%s: More than 100 file sections ?!?"
                                         " aborting...\n", __func__);
-                                printk(KERN_DEBUG "%s: block=%ld firstext=%u sect_size=%u "
+                                printk(KERN_DEBUG "%s: block=%lu firstext=%u sect_size=%u "
                                         "nextblk=%lu nextoff=%lu\n", __func__,
-                                        iblock, firstext, (unsigned) sect_size,
+                                        b_off, firstext, (unsigned) sect_size,
                                         nextblk, nextoff);
                                 goto abort;
                         }
@@ -1054,7 +1106,6 @@ int isofs_get_blocks(struct inode *inode, sector_t iblock_s,
 
         error = 0;
 abort:
-        unlock_kernel();
         return rv != 0 ? rv : error;
 }
 
@@ -1108,7 +1159,6 @@ static sector_t _isofs_bmap(struct address_space *mapping, sector_t block)
 
 static const struct address_space_operations isofs_aops = {
         .readpage = isofs_readpage,
-        .sync_page = block_sync_page,
         .bmap = _isofs_bmap
 };
 
@@ -1475,17 +1525,16 @@ struct inode *isofs_iget(struct super_block *sb,
         return inode;
 }
 
-static int isofs_get_sb(struct file_system_type *fs_type,
-        int flags, const char *dev_name, void *data, struct vfsmount *mnt)
+static struct dentry *isofs_mount(struct file_system_type *fs_type,
+        int flags, const char *dev_name, void *data)
 {
-        return get_sb_bdev(fs_type, flags, dev_name, data, isofs_fill_super,
-                                mnt);
+        return mount_bdev(fs_type, flags, dev_name, data, isofs_fill_super);
 }
 
 static struct file_system_type iso9660_fs_type = {
         .owner          = THIS_MODULE,
         .name           = "iso9660",
-        .get_sb         = isofs_get_sb,
+        .mount          = isofs_mount,
         .kill_sb        = kill_block_super,
         .fs_flags       = FS_REQUIRES_DEV,
 };