* David S. Miller (davem@caip.rutgers.edu), 1995
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/string.h>
+#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/buffer_head.h>
#include <linux/smp_lock.h>
#include <linux/vfs.h>
+#include <linux/seq_file.h>
+#include <linux/mount.h>
#include <asm/uaccess.h>
#include "ext2.h"
#include "xattr.h"
#include "acl.h"
+#include "xip.h"
static void ext2_sync_super(struct super_block *sb,
struct ext2_super_block *es);
static int ext2_remount (struct super_block * sb, int * flags, char * data);
-static int ext2_statfs (struct super_block * sb, struct kstatfs * buf);
+static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf);
void ext2_error (struct super_block * sb, const char * function,
const char * fmt, ...)
return;
}
-static kmem_cache_t * ext2_inode_cachep;
+static struct kmem_cache * ext2_inode_cachep;
static struct inode *ext2_alloc_inode(struct super_block *sb)
{
struct ext2_inode_info *ei;
- ei = (struct ext2_inode_info *)kmem_cache_alloc(ext2_inode_cachep, SLAB_KERNEL);
+ ei = (struct ext2_inode_info *)kmem_cache_alloc(ext2_inode_cachep, GFP_KERNEL);
if (!ei)
return NULL;
#ifdef CONFIG_EXT2_FS_POSIX_ACL
kmem_cache_free(ext2_inode_cachep, EXT2_I(inode));
}
-static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
{
struct ext2_inode_info *ei = (struct ext2_inode_info *) foo;
{
ext2_inode_cachep = kmem_cache_create("ext2_inode_cache",
sizeof(struct ext2_inode_info),
- 0, SLAB_RECLAIM_ACCOUNT,
+ 0, (SLAB_RECLAIM_ACCOUNT|
+ SLAB_MEM_SPREAD),
init_once, NULL);
if (ext2_inode_cachep == NULL)
return -ENOMEM;
static void destroy_inodecache(void)
{
- if (kmem_cache_destroy(ext2_inode_cachep))
- printk(KERN_INFO "ext2_inode_cache: not all structures were freed\n");
+ kmem_cache_destroy(ext2_inode_cachep);
}
static void ext2_clear_inode(struct inode *inode)
ei->i_default_acl = EXT2_ACL_NOT_CACHED;
}
#endif
- if (!is_bad_inode(inode))
- ext2_discard_prealloc(inode);
}
+static int ext2_show_options(struct seq_file *seq, struct vfsmount *vfs)
+{
+ struct ext2_sb_info *sbi = EXT2_SB(vfs->mnt_sb);
+
+ if (sbi->s_mount_opt & EXT2_MOUNT_GRPID)
+ seq_puts(seq, ",grpid");
+
+#if defined(CONFIG_QUOTA)
+ if (sbi->s_mount_opt & EXT2_MOUNT_USRQUOTA)
+ seq_puts(seq, ",usrquota");
+
+ if (sbi->s_mount_opt & EXT2_MOUNT_GRPQUOTA)
+ seq_puts(seq, ",grpquota");
+#endif
+
+#if defined(CONFIG_EXT2_FS_XIP)
+ if (sbi->s_mount_opt & EXT2_MOUNT_XIP)
+ seq_puts(seq, ",xip");
+#endif
+
+ return 0;
+}
#ifdef CONFIG_QUOTA
static ssize_t ext2_quota_read(struct super_block *sb, int type, char *data, size_t len, loff_t off);
.destroy_inode = ext2_destroy_inode,
.read_inode = ext2_read_inode,
.write_inode = ext2_write_inode,
+ .put_inode = ext2_put_inode,
.delete_inode = ext2_delete_inode,
.put_super = ext2_put_super,
.write_super = ext2_write_super,
.statfs = ext2_statfs,
.remount_fs = ext2_remount,
.clear_inode = ext2_clear_inode,
+ .show_options = ext2_show_options,
#ifdef CONFIG_QUOTA
.quota_read = ext2_quota_read,
.quota_write = ext2_quota_write,
#endif
};
+static struct dentry *ext2_get_dentry(struct super_block *sb, void *vobjp)
+{
+ __u32 *objp = vobjp;
+ unsigned long ino = objp[0];
+ __u32 generation = objp[1];
+ struct inode *inode;
+ struct dentry *result;
+
+ if (ino < EXT2_FIRST_INO(sb) && ino != EXT2_ROOT_INO)
+ return ERR_PTR(-ESTALE);
+ if (ino > le32_to_cpu(EXT2_SB(sb)->s_es->s_inodes_count))
+ return ERR_PTR(-ESTALE);
+
+ /* iget isn't really right if the inode is currently unallocated!!
+ * ext2_read_inode currently does appropriate checks, but
+ * it might be "neater" to call ext2_get_inode first and check
+ * if the inode is valid.....
+ */
+ inode = iget(sb, ino);
+ if (inode == NULL)
+ return ERR_PTR(-ENOMEM);
+ if (is_bad_inode(inode) ||
+ (generation && inode->i_generation != generation)) {
+ /* we didn't find the right inode.. */
+ iput(inode);
+ return ERR_PTR(-ESTALE);
+ }
+ /* now to find a dentry.
+ * If possible, get a well-connected one
+ */
+ result = d_alloc_anon(inode);
+ if (!result) {
+ iput(inode);
+ return ERR_PTR(-ENOMEM);
+ }
+ return result;
+}
+
/* Yes, most of these are left as NULL!!
* A NULL value implies the default, which works with ext2-like file
* systems, but can be improved upon.
* Currently only get_parent is required.
*/
-struct dentry *ext2_get_parent(struct dentry *child);
static struct export_operations ext2_export_ops = {
.get_parent = ext2_get_parent,
+ .get_dentry = ext2_get_dentry,
};
static unsigned long get_sb_block(void **data)
enum {
Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid,
- Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro,
- Opt_nouid32, Opt_check, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, Opt_nobh,
- Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, Opt_tagxid,
- Opt_ignore, Opt_err,
+ Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic,
+ Opt_err_ro, Opt_nouid32, Opt_nocheck, Opt_debug,
+ Opt_oldalloc, Opt_orlov, Opt_nobh, Opt_user_xattr, Opt_nouser_xattr,
+ Opt_acl, Opt_noacl, Opt_xip, Opt_ignore, Opt_err, Opt_quota,
+ Opt_usrquota, Opt_grpquota, Opt_tag, Opt_notag, Opt_tagid
};
static match_table_t tokens = {
{Opt_nouid32, "nouid32"},
{Opt_nocheck, "check=none"},
{Opt_nocheck, "nocheck"},
- {Opt_check, "check"},
{Opt_debug, "debug"},
{Opt_oldalloc, "oldalloc"},
{Opt_orlov, "orlov"},
{Opt_nouser_xattr, "nouser_xattr"},
{Opt_acl, "acl"},
{Opt_noacl, "noacl"},
- {Opt_tagxid, "tagxid"},
- {Opt_ignore, "grpquota"},
+ {Opt_xip, "xip"},
+ {Opt_tag, "tag"},
+ {Opt_notag, "notag"},
+ {Opt_tagid, "tagid=%u"},
+ {Opt_tag, "tagxid"},
+ {Opt_grpquota, "grpquota"},
{Opt_ignore, "noquota"},
- {Opt_ignore, "quota"},
- {Opt_ignore, "usrquota"},
+ {Opt_quota, "quota"},
+ {Opt_usrquota, "usrquota"},
{Opt_err, NULL}
};
{
char * p;
substring_t args[MAX_OPT_ARGS];
- unsigned long kind = EXT2_MOUNT_ERRORS_CONT;
int option;
if (!options)
/* *sb_block = match_int(&args[0]); */
break;
case Opt_err_panic:
- kind = EXT2_MOUNT_ERRORS_PANIC;
+ clear_opt (sbi->s_mount_opt, ERRORS_CONT);
+ clear_opt (sbi->s_mount_opt, ERRORS_RO);
+ set_opt (sbi->s_mount_opt, ERRORS_PANIC);
break;
case Opt_err_ro:
- kind = EXT2_MOUNT_ERRORS_RO;
+ clear_opt (sbi->s_mount_opt, ERRORS_CONT);
+ clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
+ set_opt (sbi->s_mount_opt, ERRORS_RO);
break;
case Opt_err_cont:
- kind = EXT2_MOUNT_ERRORS_CONT;
+ clear_opt (sbi->s_mount_opt, ERRORS_RO);
+ clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
+ set_opt (sbi->s_mount_opt, ERRORS_CONT);
break;
case Opt_nouid32:
set_opt (sbi->s_mount_opt, NO_UID32);
break;
-#ifndef CONFIG_INOXID_NONE
- case Opt_tagxid:
- set_opt (sbi->s_mount_opt, TAG_XID);
+#ifndef CONFIG_TAGGING_NONE
+ case Opt_tag:
+ set_opt (sbi->s_mount_opt, TAGGED);
+ break;
+ case Opt_notag:
+ clear_opt (sbi->s_mount_opt, TAGGED);
break;
#endif
- case Opt_check:
-#ifdef CONFIG_EXT2_CHECK
- set_opt (sbi->s_mount_opt, CHECK);
-#else
- printk("EXT2 Check option not supported\n");
-#endif
+#ifdef CONFIG_PROPAGATE
+ case Opt_tagid:
+ /* use args[0] */
+ set_opt (sbi->s_mount_opt, TAGGED);
break;
+#endif
case Opt_nocheck:
clear_opt (sbi->s_mount_opt, CHECK);
break;
printk("EXT2 (no)acl options not supported\n");
break;
#endif
+ case Opt_xip:
+#ifdef CONFIG_EXT2_FS_XIP
+ set_opt (sbi->s_mount_opt, XIP);
+#else
+ printk("EXT2 xip option not supported\n");
+#endif
+ break;
+
+#if defined(CONFIG_QUOTA)
+ case Opt_quota:
+ case Opt_usrquota:
+ set_opt(sbi->s_mount_opt, USRQUOTA);
+ break;
+
+ case Opt_grpquota:
+ set_opt(sbi->s_mount_opt, GRPQUOTA);
+ break;
+#else
+ case Opt_quota:
+ case Opt_usrquota:
+ case Opt_grpquota:
+ printk(KERN_ERR
+ "EXT2-fs: quota operations not supported.\n");
+
+ break;
+#endif
+
case Opt_ignore:
break;
default:
return 0;
}
}
- sbi->s_mount_opt |= kind;
return 1;
}
EXT2_BLOCKS_PER_GROUP(sb),
EXT2_INODES_PER_GROUP(sb),
sbi->s_mount_opt);
-#ifdef CONFIG_EXT2_CHECK
- if (test_opt (sb, CHECK)) {
- ext2_check_blocks_bitmap (sb);
- ext2_check_inodes_bitmap (sb);
- }
-#endif
return res;
}
int i;
int desc_block = 0;
struct ext2_sb_info *sbi = EXT2_SB(sb);
- unsigned long block = le32_to_cpu(sbi->s_es->s_first_data_block);
+ unsigned long first_block = le32_to_cpu(sbi->s_es->s_first_data_block);
+ unsigned long last_block;
struct ext2_group_desc * gdp = NULL;
ext2_debug ("Checking group descriptors");
for (i = 0; i < sbi->s_groups_count; i++)
{
+ if (i == sbi->s_groups_count - 1)
+ last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1;
+ else
+ last_block = first_block +
+ (EXT2_BLOCKS_PER_GROUP(sb) - 1);
+
if ((i % EXT2_DESC_PER_BLOCK(sb)) == 0)
gdp = (struct ext2_group_desc *) sbi->s_group_desc[desc_block++]->b_data;
- if (le32_to_cpu(gdp->bg_block_bitmap) < block ||
- le32_to_cpu(gdp->bg_block_bitmap) >= block + EXT2_BLOCKS_PER_GROUP(sb))
+ if (le32_to_cpu(gdp->bg_block_bitmap) < first_block ||
+ le32_to_cpu(gdp->bg_block_bitmap) > last_block)
{
ext2_error (sb, "ext2_check_descriptors",
"Block bitmap for group %d"
i, (unsigned long) le32_to_cpu(gdp->bg_block_bitmap));
return 0;
}
- if (le32_to_cpu(gdp->bg_inode_bitmap) < block ||
- le32_to_cpu(gdp->bg_inode_bitmap) >= block + EXT2_BLOCKS_PER_GROUP(sb))
+ if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block ||
+ le32_to_cpu(gdp->bg_inode_bitmap) > last_block)
{
ext2_error (sb, "ext2_check_descriptors",
"Inode bitmap for group %d"
i, (unsigned long) le32_to_cpu(gdp->bg_inode_bitmap));
return 0;
}
- if (le32_to_cpu(gdp->bg_inode_table) < block ||
- le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group >=
- block + EXT2_BLOCKS_PER_GROUP(sb))
+ if (le32_to_cpu(gdp->bg_inode_table) < first_block ||
+ le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group >
+ last_block)
{
ext2_error (sb, "ext2_check_descriptors",
"Inode table for group %d"
i, (unsigned long) le32_to_cpu(gdp->bg_inode_table));
return 0;
}
- block += EXT2_BLOCKS_PER_GROUP(sb);
+ first_block += EXT2_BLOCKS_PER_GROUP(sb);
gdp++;
}
return 1;
}
-#define log2(n) ffz(~(n))
-
/*
* Maximal file size. There is a direct, and {,double-,triple-}indirect
* block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
static loff_t ext2_max_size(int bits)
{
loff_t res = EXT2_NDIR_BLOCKS;
+ /* This constant is calculated to be the largest file size for a
+ * dense, 4k-blocksize file such that the total number of
+ * sectors in the file, including data and all indirect blocks,
+ * does not exceed 2^32. */
+ const loff_t upper_limit = 0x1ff7fffd000LL;
+
res += 1LL << (bits-2);
res += 1LL << (2*(bits-2));
res += 1LL << (3*(bits-2));
res <<= bits;
- if (res > (512LL << 32) - (1 << bits))
- res = (512LL << 32) - (1 << bits);
+ if (res > upper_limit)
+ res = upper_limit;
return res;
}
int i, j;
__le32 features;
- sbi = kmalloc(sizeof(*sbi), GFP_KERNEL);
+ sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
return -ENOMEM;
sb->s_fs_info = sbi;
- memset(sbi, 0, sizeof(*sbi));
/*
* See what the current blocksize for the device is, and
set_opt(sbi->s_mount_opt, GRPID);
if (def_mount_opts & EXT2_DEFM_UID16)
set_opt(sbi->s_mount_opt, NO_UID32);
+#ifdef CONFIG_EXT2_FS_XATTR
if (def_mount_opts & EXT2_DEFM_XATTR_USER)
set_opt(sbi->s_mount_opt, XATTR_USER);
+#endif
+#ifdef CONFIG_EXT2_FS_POSIX_ACL
if (def_mount_opts & EXT2_DEFM_ACL)
set_opt(sbi->s_mount_opt, POSIX_ACL);
+#endif
if (le16_to_cpu(sbi->s_es->s_errors) == EXT2_ERRORS_PANIC)
set_opt(sbi->s_mount_opt, ERRORS_PANIC);
else if (le16_to_cpu(sbi->s_es->s_errors) == EXT2_ERRORS_RO)
set_opt(sbi->s_mount_opt, ERRORS_RO);
+ else
+ set_opt(sbi->s_mount_opt, ERRORS_CONT);
sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
if (!parse_options ((char *) data, sbi))
goto failed_mount;
- if (EXT2_SB(sb)->s_mount_opt & EXT2_MOUNT_TAG_XID)
- sb->s_flags |= MS_TAGXID;
+ if (EXT2_SB(sb)->s_mount_opt & EXT2_MOUNT_TAGGED)
+ sb->s_flags |= MS_TAGGED;
sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
((EXT2_SB(sb)->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ?
MS_POSIXACL : 0);
+ ext2_xip_verify_sb(sb); /* see if bdev supports xip, unset
+ EXT2_MOUNT_XIP if not */
+
if (le32_to_cpu(es->s_rev_level) == EXT2_GOOD_OLD_REV &&
(EXT2_HAS_COMPAT_FEATURE(sb, ~0U) ||
EXT2_HAS_RO_COMPAT_FEATURE(sb, ~0U) ||
blocksize = BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size);
+ if ((ext2_use_xip(sb)) && ((blocksize != PAGE_SIZE) ||
+ (sb->s_blocksize != blocksize))) {
+ if (!silent)
+ printk("XIP: Unsupported blocksize\n");
+ goto failed_mount;
+ }
+
/* If the blocksize doesn't match, re-read the thing.. */
if (sb->s_blocksize != blocksize) {
brelse(bh);
if (EXT2_INODE_SIZE(sb) == 0)
goto cantfind_ext2;
sbi->s_inodes_per_block = sb->s_blocksize / EXT2_INODE_SIZE(sb);
- if (sbi->s_inodes_per_block == 0)
+ if (sbi->s_inodes_per_block == 0 || sbi->s_inodes_per_group == 0)
goto cantfind_ext2;
sbi->s_itb_per_group = sbi->s_inodes_per_group /
sbi->s_inodes_per_block;
sbi->s_sbh = bh;
sbi->s_mount_state = le16_to_cpu(es->s_state);
sbi->s_addr_per_block_bits =
- log2 (EXT2_ADDR_PER_BLOCK(sb));
+ ilog2 (EXT2_ADDR_PER_BLOCK(sb));
sbi->s_desc_per_block_bits =
- log2 (EXT2_DESC_PER_BLOCK(sb));
+ ilog2 (EXT2_DESC_PER_BLOCK(sb));
if (sb->s_magic != EXT2_SUPER_MAGIC)
goto cantfind_ext2;
if (EXT2_BLOCKS_PER_GROUP(sb) == 0)
goto cantfind_ext2;
- sbi->s_groups_count = (le32_to_cpu(es->s_blocks_count) -
- le32_to_cpu(es->s_first_data_block) +
- EXT2_BLOCKS_PER_GROUP(sb) - 1) /
- EXT2_BLOCKS_PER_GROUP(sb);
+ sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
+ le32_to_cpu(es->s_first_data_block) - 1)
+ / EXT2_BLOCKS_PER_GROUP(sb)) + 1;
db_count = (sbi->s_groups_count + EXT2_DESC_PER_BLOCK(sb) - 1) /
EXT2_DESC_PER_BLOCK(sb);
sbi->s_group_desc = kmalloc (db_count * sizeof (struct buffer_head *), GFP_KERNEL);
printk ("EXT2-fs: not enough memory\n");
goto failed_mount;
}
- percpu_counter_init(&sbi->s_freeblocks_counter);
- percpu_counter_init(&sbi->s_freeinodes_counter);
- percpu_counter_init(&sbi->s_dirs_counter);
bgl_lock_init(&sbi->s_blockgroup_lock);
sbi->s_debts = kmalloc(sbi->s_groups_count * sizeof(*sbi->s_debts),
GFP_KERNEL);
}
if (!ext2_check_descriptors (sb)) {
printk ("EXT2-fs: group descriptors corrupted!\n");
- db_count = i;
goto failed_mount2;
}
sbi->s_gdb_count = db_count;
get_random_bytes(&sbi->s_next_generation, sizeof(u32));
spin_lock_init(&sbi->s_next_gen_lock);
+
+ percpu_counter_init(&sbi->s_freeblocks_counter,
+ ext2_count_free_blocks(sb));
+ percpu_counter_init(&sbi->s_freeinodes_counter,
+ ext2_count_free_inodes(sb));
+ percpu_counter_init(&sbi->s_dirs_counter,
+ ext2_count_dirs(sb));
/*
* set up enough so that it can read an inode
*/
if (!sb->s_root) {
iput(root);
printk(KERN_ERR "EXT2-fs: get root inode failed\n");
- goto failed_mount2;
+ goto failed_mount3;
}
if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
dput(sb->s_root);
sb->s_root = NULL;
printk(KERN_ERR "EXT2-fs: corrupt root inode, run e2fsck\n");
- goto failed_mount2;
+ goto failed_mount3;
}
if (EXT2_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL))
ext2_warning(sb, __FUNCTION__,
- "mounting ext3 filesystem as ext2\n");
+ "mounting ext3 filesystem as ext2");
ext2_setup_super (sb, es, sb->s_flags & MS_RDONLY);
- percpu_counter_mod(&sbi->s_freeblocks_counter,
- ext2_count_free_blocks(sb));
- percpu_counter_mod(&sbi->s_freeinodes_counter,
- ext2_count_free_inodes(sb));
- percpu_counter_mod(&sbi->s_dirs_counter,
- ext2_count_dirs(sb));
return 0;
cantfind_ext2:
printk("VFS: Can't find an ext2 filesystem on dev %s.\n",
sb->s_id);
goto failed_mount;
-
+failed_mount3:
+ percpu_counter_destroy(&sbi->s_freeblocks_counter);
+ percpu_counter_destroy(&sbi->s_freeinodes_counter);
+ percpu_counter_destroy(&sbi->s_dirs_counter);
failed_mount2:
for (i = 0; i < db_count; i++)
brelse(sbi->s_group_desc[i]);
{
struct ext2_sb_info * sbi = EXT2_SB(sb);
struct ext2_super_block * es;
+ unsigned long old_mount_opt = sbi->s_mount_opt;
+ struct ext2_mount_options old_opts;
+ unsigned long old_sb_flags;
+ int err;
+
+ /* Store the old options */
+ old_sb_flags = sb->s_flags;
+ old_opts.s_mount_opt = sbi->s_mount_opt;
+ old_opts.s_resuid = sbi->s_resuid;
+ old_opts.s_resgid = sbi->s_resgid;
/*
* Allow the "check" option to be passed as a remount option.
*/
- if (!parse_options (data, sbi))
+ if (!parse_options (data, sbi)) {
+ err = -EINVAL;
+ goto restore_opts;
+ }
+
+ if ((sbi->s_mount_opt & EXT2_MOUNT_TAGGED) &&
+ !(sb->s_flags & MS_TAGGED)) {
+ printk("EXT2-fs: %s: tagging not permitted on remount.\n",
+ sb->s_id);
return -EINVAL;
+ }
sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
((sbi->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
es = sbi->s_es;
+ if (((sbi->s_mount_opt & EXT2_MOUNT_XIP) !=
+ (old_mount_opt & EXT2_MOUNT_XIP)) &&
+ invalidate_inodes(sb))
+ ext2_warning(sb, __FUNCTION__, "busy inodes while remounting "\
+ "xip remain in cache (no functional problem)");
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
return 0;
if (*flags & MS_RDONLY) {
printk("EXT2-fs: %s: couldn't remount RDWR because of "
"unsupported optional features (%x).\n",
sb->s_id, le32_to_cpu(ret));
- return -EROFS;
+ err = -EROFS;
+ goto restore_opts;
}
/*
* Mounting a RDONLY partition read-write, so reread and
}
ext2_sync_super(sb, es);
return 0;
+restore_opts:
+ sbi->s_mount_opt = old_opts.s_mount_opt;
+ sbi->s_resuid = old_opts.s_resuid;
+ sbi->s_resgid = old_opts.s_resgid;
+ sb->s_flags = old_sb_flags;
+ return err;
}
-static int ext2_statfs (struct super_block * sb, struct kstatfs * buf)
+static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf)
{
+ struct super_block *sb = dentry->d_sb;
struct ext2_sb_info *sbi = EXT2_SB(sb);
+ struct ext2_super_block *es = sbi->s_es;
unsigned long overhead;
int i;
+ u64 fsid;
if (test_opt (sb, MINIX_DF))
overhead = 0;
* All of the blocks before first_data_block are
* overhead
*/
- overhead = le32_to_cpu(sbi->s_es->s_first_data_block);
+ overhead = le32_to_cpu(es->s_first_data_block);
/*
* Add the overhead attributed to the superblock and
buf->f_type = EXT2_SUPER_MAGIC;
buf->f_bsize = sb->s_blocksize;
- buf->f_blocks = le32_to_cpu(sbi->s_es->s_blocks_count) - overhead;
+ buf->f_blocks = le32_to_cpu(es->s_blocks_count) - overhead;
buf->f_bfree = ext2_count_free_blocks(sb);
- buf->f_bavail = buf->f_bfree - le32_to_cpu(sbi->s_es->s_r_blocks_count);
- if (buf->f_bfree < le32_to_cpu(sbi->s_es->s_r_blocks_count))
+ buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count);
+ if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count))
buf->f_bavail = 0;
- buf->f_files = le32_to_cpu(sbi->s_es->s_inodes_count);
- buf->f_ffree = ext2_count_free_inodes (sb);
+ buf->f_files = le32_to_cpu(es->s_inodes_count);
+ buf->f_ffree = ext2_count_free_inodes(sb);
buf->f_namelen = EXT2_NAME_LEN;
+ fsid = le64_to_cpup((void *)es->s_uuid) ^
+ le64_to_cpup((void *)es->s_uuid + sizeof(u64));
+ buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL;
+ buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL;
return 0;
}
-static struct super_block *ext2_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int ext2_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, ext2_fill_super);
+ return get_sb_bdev(fs_type, flags, dev_name, data, ext2_fill_super, mnt);
}
#ifdef CONFIG_QUOTA
struct buffer_head tmp_bh;
struct buffer_head *bh;
- down(&inode->i_sem);
+ mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
while (towrite > 0) {
tocopy = sb->s_blocksize - offset < towrite ?
sb->s_blocksize - offset : towrite;
inode->i_version++;
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
mark_inode_dirty(inode);
- up(&inode->i_sem);
+ mutex_unlock(&inode->i_mutex);
return len - towrite;
}
git://git.onelab.eu / linux-2.6.git / blobdiff