#include <linux/seq_file.h>
#include <linux/mount.h>
#include <linux/log2.h>
+#include <linux/quotaops.h>
#include <asm/uaccess.h>
#include "ext2.h"
#include "xattr.h"
#include "xip.h"
static void ext2_sync_super(struct super_block *sb,
- struct ext2_super_block *es);
+ struct ext2_super_block *es, int wait);
static int ext2_remount (struct super_block * sb, int * flags, char * data);
static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf);
+static int ext2_sync_fs(struct super_block *sb, int wait);
void ext2_error (struct super_block * sb, const char * function,
const char * fmt, ...)
struct ext2_super_block *es = sbi->s_es;
if (!(sb->s_flags & MS_RDONLY)) {
+ spin_lock(&sbi->s_lock);
sbi->s_mount_state |= EXT2_ERROR_FS;
- es->s_state =
- cpu_to_le16(le16_to_cpu(es->s_state) | EXT2_ERROR_FS);
- ext2_sync_super(sb, es);
+ es->s_state |= cpu_to_le16(EXT2_ERROR_FS);
+ spin_unlock(&sbi->s_lock);
+ ext2_sync_super(sb, es, 1);
}
va_start(args, fmt);
- printk(KERN_CRIT "EXT2-fs error (device %s): %s: ",sb->s_id, function);
+ printk(KERN_CRIT "EXT2-fs (%s): error: %s: ", sb->s_id, function);
vprintk(fmt, args);
printk("\n");
va_end(args);
if (test_opt(sb, ERRORS_PANIC))
- panic("EXT2-fs panic from previous error\n");
+ panic("EXT2-fs: panic from previous error\n");
if (test_opt(sb, ERRORS_RO)) {
- printk("Remounting filesystem read-only\n");
+ ext2_msg(sb, KERN_CRIT,
+ "error: remounting filesystem read-only");
sb->s_flags |= MS_RDONLY;
}
}
-void ext2_warning (struct super_block * sb, const char * function,
- const char * fmt, ...)
+void ext2_msg(struct super_block *sb, const char *prefix,
+ const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
- printk(KERN_WARNING "EXT2-fs warning (device %s): %s: ",
- sb->s_id, function);
+ printk("%sEXT2-fs (%s): ", prefix, sb->s_id);
vprintk(fmt, args);
printk("\n");
va_end(args);
}
+/*
+ * This must be called with sbi->s_lock held.
+ */
void ext2_update_dynamic_rev(struct super_block *sb)
{
struct ext2_super_block *es = EXT2_SB(sb)->s_es;
if (le32_to_cpu(es->s_rev_level) > EXT2_GOOD_OLD_REV)
return;
- ext2_warning(sb, __FUNCTION__,
- "updating to rev %d because of new feature flag, "
- "running e2fsck is recommended",
+ ext2_msg(sb, KERN_WARNING,
+ "warning: updating to rev %d because of "
+ "new feature flag, running e2fsck is recommended",
EXT2_DYNAMIC_REV);
es->s_first_ino = cpu_to_le32(EXT2_GOOD_OLD_FIRST_INO);
int i;
struct ext2_sb_info *sbi = EXT2_SB(sb);
+ lock_kernel();
+
+ if (sb->s_dirt)
+ ext2_write_super(sb);
+
ext2_xattr_put_super(sb);
if (!(sb->s_flags & MS_RDONLY)) {
struct ext2_super_block *es = sbi->s_es;
+ spin_lock(&sbi->s_lock);
es->s_state = cpu_to_le16(sbi->s_mount_state);
- ext2_sync_super(sb, es);
+ spin_unlock(&sbi->s_lock);
+ ext2_sync_super(sb, es, 1);
}
db_count = sbi->s_gdb_count;
for (i = 0; i < db_count; i++)
percpu_counter_destroy(&sbi->s_dirs_counter);
brelse (sbi->s_sbh);
sb->s_fs_info = NULL;
+ kfree(sbi->s_blockgroup_lock);
kfree(sbi);
- return;
+ unlock_kernel();
}
static struct kmem_cache * ext2_inode_cachep;
ei = (struct ext2_inode_info *)kmem_cache_alloc(ext2_inode_cachep, GFP_KERNEL);
if (!ei)
return NULL;
-#ifdef CONFIG_EXT2_FS_POSIX_ACL
- ei->i_acl = EXT2_ACL_NOT_CACHED;
- ei->i_default_acl = EXT2_ACL_NOT_CACHED;
-#endif
ei->i_block_alloc_info = NULL;
ei->vfs_inode.i_version = 1;
return &ei->vfs_inode;
kmem_cache_free(ext2_inode_cachep, EXT2_I(inode));
}
-static void init_once(struct kmem_cache * cachep, void *foo)
+static void init_once(void *foo)
{
struct ext2_inode_info *ei = (struct ext2_inode_info *) foo;
static void ext2_clear_inode(struct inode *inode)
{
struct ext2_block_alloc_info *rsv = EXT2_I(inode)->i_block_alloc_info;
-#ifdef CONFIG_EXT2_FS_POSIX_ACL
- struct ext2_inode_info *ei = EXT2_I(inode);
- if (ei->i_acl && ei->i_acl != EXT2_ACL_NOT_CACHED) {
- posix_acl_release(ei->i_acl);
- ei->i_acl = EXT2_ACL_NOT_CACHED;
- }
- if (ei->i_default_acl && ei->i_default_acl != EXT2_ACL_NOT_CACHED) {
- posix_acl_release(ei->i_default_acl);
- ei->i_default_acl = EXT2_ACL_NOT_CACHED;
- }
-#endif
+ dquot_drop(inode);
ext2_discard_reservation(inode);
EXT2_I(inode)->i_block_alloc_info = NULL;
if (unlikely(rsv))
struct ext2_super_block *es = sbi->s_es;
unsigned long def_mount_opts;
+ spin_lock(&sbi->s_lock);
def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
if (sbi->s_sb_block != 1)
if (!test_opt(sb, RESERVATION))
seq_puts(seq, ",noreservation");
+ spin_unlock(&sbi->s_lock);
return 0;
}
.delete_inode = ext2_delete_inode,
.put_super = ext2_put_super,
.write_super = ext2_write_super,
+ .sync_fs = ext2_sync_fs,
.statfs = ext2_statfs,
.remount_fs = ext2_remount,
.clear_inode = ext2_clear_inode,
Opt_usrquota, Opt_grpquota, Opt_reservation, Opt_noreservation
};
-static match_table_t tokens = {
+static const match_table_t tokens = {
{Opt_bsd_df, "bsddf"},
{Opt_minix_df, "minixdf"},
{Opt_grpid, "grpid"},
{Opt_err, NULL}
};
-static int parse_options (char * options,
- struct ext2_sb_info *sbi)
+static int parse_options(char *options, struct super_block *sb)
{
- char * p;
+ char *p;
+ struct ext2_sb_info *sbi = EXT2_SB(sb);
substring_t args[MAX_OPT_ARGS];
int option;
#else
case Opt_user_xattr:
case Opt_nouser_xattr:
- printk("EXT2 (no)user_xattr options not supported\n");
+ ext2_msg(sb, KERN_INFO, "(no)user_xattr options"
+ "not supported");
break;
#endif
#ifdef CONFIG_EXT2_FS_POSIX_ACL
#else
case Opt_acl:
case Opt_noacl:
- printk("EXT2 (no)acl options not supported\n");
+ ext2_msg(sb, KERN_INFO,
+ "(no)acl options not supported");
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");
+ ext2_msg(sb, KERN_INFO, "xip option not supported");
#endif
break;
case Opt_quota:
case Opt_usrquota:
case Opt_grpquota:
- printk(KERN_ERR
- "EXT2-fs: quota operations not supported.\n");
-
+ ext2_msg(sb, KERN_INFO,
+ "quota operations not supported");
break;
#endif
case Opt_reservation:
set_opt(sbi->s_mount_opt, RESERVATION);
- printk("reservations ON\n");
+ ext2_msg(sb, KERN_INFO, "reservations ON");
break;
case Opt_noreservation:
clear_opt(sbi->s_mount_opt, RESERVATION);
- printk("reservations OFF\n");
+ ext2_msg(sb, KERN_INFO, "reservations OFF");
break;
case Opt_ignore:
break;
struct ext2_sb_info *sbi = EXT2_SB(sb);
if (le32_to_cpu(es->s_rev_level) > EXT2_MAX_SUPP_REV) {
- printk ("EXT2-fs warning: revision level too high, "
- "forcing read-only mode\n");
+ ext2_msg(sb, KERN_ERR,
+ "error: revision level too high, "
+ "forcing read-only mode");
res = MS_RDONLY;
}
if (read_only)
return res;
if (!(sbi->s_mount_state & EXT2_VALID_FS))
- printk ("EXT2-fs warning: mounting unchecked fs, "
- "running e2fsck is recommended\n");
+ ext2_msg(sb, KERN_WARNING,
+ "warning: mounting unchecked fs, "
+ "running e2fsck is recommended");
else if ((sbi->s_mount_state & EXT2_ERROR_FS))
- printk ("EXT2-fs warning: mounting fs with errors, "
- "running e2fsck is recommended\n");
+ ext2_msg(sb, KERN_WARNING,
+ "warning: mounting fs with errors, "
+ "running e2fsck is recommended");
else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 &&
le16_to_cpu(es->s_mnt_count) >=
(unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count))
- printk ("EXT2-fs warning: maximal mount count reached, "
- "running e2fsck is recommended\n");
+ ext2_msg(sb, KERN_WARNING,
+ "warning: maximal mount count reached, "
+ "running e2fsck is recommended");
else if (le32_to_cpu(es->s_checkinterval) &&
- (le32_to_cpu(es->s_lastcheck) + le32_to_cpu(es->s_checkinterval) <= get_seconds()))
- printk ("EXT2-fs warning: checktime reached, "
- "running e2fsck is recommended\n");
+ (le32_to_cpu(es->s_lastcheck) +
+ le32_to_cpu(es->s_checkinterval) <= get_seconds()))
+ ext2_msg(sb, KERN_WARNING,
+ "warning: checktime reached, "
+ "running e2fsck is recommended");
if (!le16_to_cpu(es->s_max_mnt_count))
es->s_max_mnt_count = cpu_to_le16(EXT2_DFL_MAX_MNT_COUNT);
le16_add_cpu(&es->s_mnt_count, 1);
- ext2_write_super(sb);
if (test_opt (sb, DEBUG))
- printk ("[EXT II FS %s, %s, bs=%lu, fs=%lu, gc=%lu, "
- "bpg=%lu, ipg=%lu, mo=%04lx]\n",
+ ext2_msg(sb, KERN_INFO, "%s, %s, bs=%lu, fs=%lu, gc=%lu, "
+ "bpg=%lu, ipg=%lu, mo=%04lx]",
EXT2FS_VERSION, EXT2FS_DATE, sb->s_blocksize,
sbi->s_frag_size,
sbi->s_groups_count,
{
int i;
struct ext2_sb_info *sbi = EXT2_SB(sb);
- unsigned long first_block = le32_to_cpu(sbi->s_es->s_first_data_block);
- unsigned long last_block;
ext2_debug ("Checking group descriptors");
for (i = 0; i < sbi->s_groups_count; i++) {
struct ext2_group_desc *gdp = ext2_get_group_desc(sb, i, NULL);
+ ext2_fsblk_t first_block = ext2_group_first_block_no(sb, i);
+ ext2_fsblk_t last_block;
if (i == sbi->s_groups_count - 1)
last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1;
i, (unsigned long) le32_to_cpu(gdp->bg_inode_table));
return 0;
}
- first_block += EXT2_BLOCKS_PER_GROUP(sb);
}
return 1;
}
int nr)
{
struct ext2_sb_info *sbi = EXT2_SB(sb);
- unsigned long bg, first_data_block, first_meta_bg;
+ unsigned long bg, first_meta_bg;
int has_super = 0;
- first_data_block = le32_to_cpu(sbi->s_es->s_first_data_block);
first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);
if (!EXT2_HAS_INCOMPAT_FEATURE(sb, EXT2_FEATURE_INCOMPAT_META_BG) ||
bg = sbi->s_desc_per_block * nr;
if (ext2_bg_has_super(sb, bg))
has_super = 1;
- return (first_data_block + has_super + (bg * sbi->s_blocks_per_group));
+
+ return ext2_group_first_block_no(sb, bg) + has_super;
}
static int ext2_fill_super(struct super_block *sb, void *data, int silent)
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
return -ENOMEM;
+
+ sbi->s_blockgroup_lock =
+ kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
+ if (!sbi->s_blockgroup_lock) {
+ kfree(sbi);
+ return -ENOMEM;
+ }
sb->s_fs_info = sbi;
sbi->s_sb_block = sb_block;
+ spin_lock_init(&sbi->s_lock);
+
/*
* See what the current blocksize for the device is, and
* use that as the blocksize. Otherwise (or if the blocksize
*/
blocksize = sb_min_blocksize(sb, BLOCK_SIZE);
if (!blocksize) {
- printk ("EXT2-fs: unable to set blocksize\n");
+ ext2_msg(sb, KERN_ERR, "error: unable to set blocksize");
goto failed_sbi;
}
}
if (!(bh = sb_bread(sb, logic_sb_block))) {
- printk ("EXT2-fs: unable to read superblock\n");
+ ext2_msg(sb, KERN_ERR, "error: unable to read superblock");
goto failed_sbi;
}
/*
set_opt(sbi->s_mount_opt, RESERVATION);
- if (!parse_options ((char *) data, sbi))
+ if (!parse_options((char *) data, sb))
goto failed_mount;
sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
(EXT2_HAS_COMPAT_FEATURE(sb, ~0U) ||
EXT2_HAS_RO_COMPAT_FEATURE(sb, ~0U) ||
EXT2_HAS_INCOMPAT_FEATURE(sb, ~0U)))
- printk("EXT2-fs warning: feature flags set on rev 0 fs, "
- "running e2fsck is recommended\n");
+ ext2_msg(sb, KERN_WARNING,
+ "warning: feature flags set on rev 0 fs, "
+ "running e2fsck is recommended");
/*
* Check feature flags regardless of the revision level, since we
* previously didn't change the revision level when setting the flags,
*/
features = EXT2_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP);
if (features) {
- printk("EXT2-fs: %s: couldn't mount because of "
- "unsupported optional features (%x).\n",
- sb->s_id, le32_to_cpu(features));
+ ext2_msg(sb, KERN_ERR, "error: couldn't mount because of "
+ "unsupported optional features (%x)",
+ le32_to_cpu(features));
goto failed_mount;
}
if (!(sb->s_flags & MS_RDONLY) &&
(features = EXT2_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP))){
- printk("EXT2-fs: %s: couldn't mount RDWR because of "
- "unsupported optional features (%x).\n",
- sb->s_id, le32_to_cpu(features));
+ ext2_msg(sb, KERN_ERR, "error: couldn't mount RDWR because of "
+ "unsupported optional features (%x)",
+ le32_to_cpu(features));
goto failed_mount;
}
if (ext2_use_xip(sb) && blocksize != PAGE_SIZE) {
if (!silent)
- printk("XIP: Unsupported blocksize\n");
+ ext2_msg(sb, KERN_ERR,
+ "error: unsupported blocksize for xip");
goto failed_mount;
}
brelse(bh);
if (!sb_set_blocksize(sb, blocksize)) {
- printk(KERN_ERR "EXT2-fs: blocksize too small for device.\n");
+ ext2_msg(sb, KERN_ERR, "error: blocksize is too small");
goto failed_sbi;
}
offset = (sb_block*BLOCK_SIZE) % blocksize;
bh = sb_bread(sb, logic_sb_block);
if(!bh) {
- printk("EXT2-fs: Couldn't read superblock on "
- "2nd try.\n");
+ ext2_msg(sb, KERN_ERR, "error: couldn't read"
+ "superblock on 2nd try");
goto failed_sbi;
}
es = (struct ext2_super_block *) (((char *)bh->b_data) + offset);
sbi->s_es = es;
if (es->s_magic != cpu_to_le16(EXT2_SUPER_MAGIC)) {
- printk ("EXT2-fs: Magic mismatch, very weird !\n");
+ ext2_msg(sb, KERN_ERR, "error: magic mismatch");
goto failed_mount;
}
}
if ((sbi->s_inode_size < EXT2_GOOD_OLD_INODE_SIZE) ||
!is_power_of_2(sbi->s_inode_size) ||
(sbi->s_inode_size > blocksize)) {
- printk ("EXT2-fs: unsupported inode size: %d\n",
+ ext2_msg(sb, KERN_ERR,
+ "error: unsupported inode size: %d",
sbi->s_inode_size);
goto failed_mount;
}
if (sb->s_blocksize != bh->b_size) {
if (!silent)
- printk ("VFS: Unsupported blocksize on dev "
- "%s.\n", sb->s_id);
+ ext2_msg(sb, KERN_ERR, "error: unsupported blocksize");
goto failed_mount;
}
if (sb->s_blocksize != sbi->s_frag_size) {
- printk ("EXT2-fs: fragsize %lu != blocksize %lu (not supported yet)\n",
+ ext2_msg(sb, KERN_ERR,
+ "error: fragsize %lu != blocksize %lu"
+ "(not supported yet)",
sbi->s_frag_size, sb->s_blocksize);
goto failed_mount;
}
if (sbi->s_blocks_per_group > sb->s_blocksize * 8) {
- printk ("EXT2-fs: #blocks per group too big: %lu\n",
+ ext2_msg(sb, KERN_ERR,
+ "error: #blocks per group too big: %lu",
sbi->s_blocks_per_group);
goto failed_mount;
}
if (sbi->s_frags_per_group > sb->s_blocksize * 8) {
- printk ("EXT2-fs: #fragments per group too big: %lu\n",
+ ext2_msg(sb, KERN_ERR,
+ "error: #fragments per group too big: %lu",
sbi->s_frags_per_group);
goto failed_mount;
}
if (sbi->s_inodes_per_group > sb->s_blocksize * 8) {
- printk ("EXT2-fs: #inodes per group too big: %lu\n",
+ ext2_msg(sb, KERN_ERR,
+ "error: #inodes per group too big: %lu",
sbi->s_inodes_per_group);
goto failed_mount;
}
EXT2_DESC_PER_BLOCK(sb);
sbi->s_group_desc = kmalloc (db_count * sizeof (struct buffer_head *), GFP_KERNEL);
if (sbi->s_group_desc == NULL) {
- printk ("EXT2-fs: not enough memory\n");
+ ext2_msg(sb, KERN_ERR, "error: not enough memory");
goto failed_mount;
}
- bgl_lock_init(&sbi->s_blockgroup_lock);
+ bgl_lock_init(sbi->s_blockgroup_lock);
sbi->s_debts = kcalloc(sbi->s_groups_count, sizeof(*sbi->s_debts), GFP_KERNEL);
if (!sbi->s_debts) {
- printk ("EXT2-fs: not enough memory\n");
+ ext2_msg(sb, KERN_ERR, "error: not enough memory");
goto failed_mount_group_desc;
}
for (i = 0; i < db_count; i++) {
if (!sbi->s_group_desc[i]) {
for (j = 0; j < i; j++)
brelse (sbi->s_group_desc[j]);
- printk ("EXT2-fs: unable to read group descriptors\n");
+ ext2_msg(sb, KERN_ERR,
+ "error: unable to read group descriptors");
goto failed_mount_group_desc;
}
}
if (!ext2_check_descriptors (sb)) {
- printk ("EXT2-fs: group descriptors corrupted!\n");
+ ext2_msg(sb, KERN_ERR, "group descriptors corrupted");
goto failed_mount2;
}
sbi->s_gdb_count = db_count;
ext2_count_dirs(sb));
}
if (err) {
- printk(KERN_ERR "EXT2-fs: insufficient memory\n");
+ ext2_msg(sb, KERN_ERR, "error: insufficient memory");
goto failed_mount3;
}
/*
}
if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
iput(root);
- printk(KERN_ERR "EXT2-fs: corrupt root inode, run e2fsck\n");
+ ext2_msg(sb, KERN_ERR, "error: corrupt root inode, run e2fsck");
goto failed_mount3;
}
sb->s_root = d_alloc_root(root);
if (!sb->s_root) {
iput(root);
- printk(KERN_ERR "EXT2-fs: get root inode failed\n");
+ ext2_msg(sb, KERN_ERR, "error: get root inode failed");
ret = -ENOMEM;
goto failed_mount3;
}
if (EXT2_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL))
- ext2_warning(sb, __FUNCTION__,
- "mounting ext3 filesystem as ext2");
- ext2_setup_super (sb, es, sb->s_flags & MS_RDONLY);
+ ext2_msg(sb, KERN_WARNING,
+ "warning: mounting ext3 filesystem as ext2");
+ if (ext2_setup_super (sb, es, sb->s_flags & MS_RDONLY))
+ sb->s_flags |= MS_RDONLY;
+ ext2_write_super(sb);
return 0;
cantfind_ext2:
if (!silent)
- printk("VFS: Can't find an ext2 filesystem on dev %s.\n",
- sb->s_id);
+ ext2_msg(sb, KERN_ERR,
+ "error: can't find an ext2 filesystem on dev %s.",
+ sb->s_id);
goto failed_mount;
failed_mount3:
percpu_counter_destroy(&sbi->s_freeblocks_counter);
brelse(bh);
failed_sbi:
sb->s_fs_info = NULL;
+ kfree(sbi->s_blockgroup_lock);
kfree(sbi);
return ret;
}
-static void ext2_commit_super (struct super_block * sb,
- struct ext2_super_block * es)
+static void ext2_clear_super_error(struct super_block *sb)
{
- es->s_wtime = cpu_to_le32(get_seconds());
- mark_buffer_dirty(EXT2_SB(sb)->s_sbh);
- sb->s_dirt = 0;
+ struct buffer_head *sbh = EXT2_SB(sb)->s_sbh;
+
+ if (buffer_write_io_error(sbh)) {
+ /*
+ * Oh, dear. A previous attempt to write the
+ * superblock failed. This could happen because the
+ * USB device was yanked out. Or it could happen to
+ * be a transient write error and maybe the block will
+ * be remapped. Nothing we can do but to retry the
+ * write and hope for the best.
+ */
+ ext2_msg(sb, KERN_ERR,
+ "previous I/O error to superblock detected\n");
+ clear_buffer_write_io_error(sbh);
+ set_buffer_uptodate(sbh);
+ }
}
-static void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es)
+static void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es,
+ int wait)
{
+ ext2_clear_super_error(sb);
+ spin_lock(&EXT2_SB(sb)->s_lock);
es->s_free_blocks_count = cpu_to_le32(ext2_count_free_blocks(sb));
es->s_free_inodes_count = cpu_to_le32(ext2_count_free_inodes(sb));
es->s_wtime = cpu_to_le32(get_seconds());
+ /* unlock before we do IO */
+ spin_unlock(&EXT2_SB(sb)->s_lock);
mark_buffer_dirty(EXT2_SB(sb)->s_sbh);
- sync_dirty_buffer(EXT2_SB(sb)->s_sbh);
+ if (wait)
+ sync_dirty_buffer(EXT2_SB(sb)->s_sbh);
sb->s_dirt = 0;
}
* may have been checked while mounted and e2fsck may have
* set s_state to EXT2_VALID_FS after some corrections.
*/
-
-void ext2_write_super (struct super_block * sb)
+static int ext2_sync_fs(struct super_block *sb, int wait)
{
- struct ext2_super_block * es;
+ struct ext2_sb_info *sbi = EXT2_SB(sb);
+ struct ext2_super_block *es = EXT2_SB(sb)->s_es;
+
lock_kernel();
- if (!(sb->s_flags & MS_RDONLY)) {
- es = EXT2_SB(sb)->s_es;
-
- if (le16_to_cpu(es->s_state) & EXT2_VALID_FS) {
- ext2_debug ("setting valid to 0\n");
- es->s_state = cpu_to_le16(le16_to_cpu(es->s_state) &
- ~EXT2_VALID_FS);
- es->s_free_blocks_count = cpu_to_le32(ext2_count_free_blocks(sb));
- es->s_free_inodes_count = cpu_to_le32(ext2_count_free_inodes(sb));
- es->s_mtime = cpu_to_le32(get_seconds());
- ext2_sync_super(sb, es);
- } else
- ext2_commit_super (sb, es);
+ spin_lock(&sbi->s_lock);
+ if (es->s_state & cpu_to_le16(EXT2_VALID_FS)) {
+ ext2_debug("setting valid to 0\n");
+ es->s_state &= cpu_to_le16(~EXT2_VALID_FS);
}
- sb->s_dirt = 0;
+ spin_unlock(&sbi->s_lock);
+ ext2_sync_super(sb, es, wait);
unlock_kernel();
+
+ return 0;
+}
+
+
+void ext2_write_super(struct super_block *sb)
+{
+ if (!(sb->s_flags & MS_RDONLY))
+ ext2_sync_fs(sb, 1);
+ else
+ sb->s_dirt = 0;
}
static int ext2_remount (struct super_block * sb, int * flags, char * data)
unsigned long old_sb_flags;
int err;
+ lock_kernel();
+ spin_lock(&sbi->s_lock);
+
/* Store the old options */
old_sb_flags = sb->s_flags;
old_opts.s_mount_opt = sbi->s_mount_opt;
/*
* Allow the "check" option to be passed as a remount option.
*/
- if (!parse_options (data, sbi)) {
+ if (!parse_options(data, sb)) {
err = -EINVAL;
goto restore_opts;
}
EXT2_MOUNT_XIP if not */
if ((ext2_use_xip(sb)) && (sb->s_blocksize != PAGE_SIZE)) {
- printk("XIP: Unsupported blocksize\n");
+ ext2_msg(sb, KERN_WARNING,
+ "warning: unsupported blocksize for xip");
err = -EINVAL;
goto restore_opts;
}
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))
+ invalidate_inodes(sb)) {
+ ext2_msg(sb, KERN_WARNING, "warning: refusing change of "
+ "xip flag with busy inodes while remounting");
+ sbi->s_mount_opt &= ~EXT2_MOUNT_XIP;
+ sbi->s_mount_opt |= old_mount_opt & EXT2_MOUNT_XIP;
+ }
+ if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
+ spin_unlock(&sbi->s_lock);
+ unlock_kernel();
return 0;
+ }
if (*flags & MS_RDONLY) {
if (le16_to_cpu(es->s_state) & EXT2_VALID_FS ||
- !(sbi->s_mount_state & EXT2_VALID_FS))
+ !(sbi->s_mount_state & EXT2_VALID_FS)) {
+ spin_unlock(&sbi->s_lock);
+ unlock_kernel();
return 0;
+ }
/*
* OK, we are remounting a valid rw partition rdonly, so set
* the rdonly flag and then mark the partition as valid again.
*/
es->s_state = cpu_to_le16(sbi->s_mount_state);
es->s_mtime = cpu_to_le32(get_seconds());
+ spin_unlock(&sbi->s_lock);
+ ext2_sync_super(sb, es, 1);
} else {
__le32 ret = EXT2_HAS_RO_COMPAT_FEATURE(sb,
~EXT2_FEATURE_RO_COMPAT_SUPP);
if (ret) {
- printk("EXT2-fs: %s: couldn't remount RDWR because of "
- "unsupported optional features (%x).\n",
- sb->s_id, le32_to_cpu(ret));
+ ext2_msg(sb, KERN_WARNING,
+ "warning: couldn't remount RDWR because of "
+ "unsupported optional features (%x).",
+ le32_to_cpu(ret));
err = -EROFS;
goto restore_opts;
}
sbi->s_mount_state = le16_to_cpu(es->s_state);
if (!ext2_setup_super (sb, es, 0))
sb->s_flags &= ~MS_RDONLY;
+ spin_unlock(&sbi->s_lock);
+ ext2_write_super(sb);
}
- ext2_sync_super(sb, es);
+ unlock_kernel();
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;
+ spin_unlock(&sbi->s_lock);
+ unlock_kernel();
return err;
}
struct ext2_super_block *es = sbi->s_es;
u64 fsid;
+ spin_lock(&sbi->s_lock);
+
if (test_opt (sb, MINIX_DF))
sbi->s_overhead_last = 0;
else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) {
le64_to_cpup((void *)es->s_uuid + sizeof(u64));
buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL;
buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL;
+ spin_unlock(&sbi->s_lock);
return 0;
}
sb->s_blocksize - offset : toread;
tmp_bh.b_state = 0;
+ tmp_bh.b_size = sb->s_blocksize;
err = ext2_get_block(inode, blk, &tmp_bh, 0);
if (err < 0)
return err;
blk++;
}
out:
- if (len == towrite)
+ if (len == towrite) {
+ mutex_unlock(&inode->i_mutex);
return err;
+ }
if (inode->i_size < off+len-towrite)
i_size_write(inode, off+len-towrite);
inode->i_version++;