summaryrefslogtreecommitdiff
path: root/fs/ext2
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ext2')
-rw-r--r--fs/ext2/acl.c4
-rw-r--r--fs/ext2/balloc.c6
-rw-r--r--fs/ext2/ext2.h3
-rw-r--r--fs/ext2/file.c7
-rw-r--r--fs/ext2/ialloc.c21
-rw-r--r--fs/ext2/inode.c160
-rw-r--r--fs/ext2/super.c117
-rw-r--r--fs/ext2/xattr.c12
-rw-r--r--fs/ext2/xattr.h12
-rw-r--r--fs/ext2/xattr_security.c2
-rw-r--r--fs/ext2/xattr_trusted.c2
-rw-r--r--fs/ext2/xattr_user.c2
12 files changed, 218 insertions, 130 deletions
diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index a99e54318c3d..ca7e2a0ed98a 100644
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -420,7 +420,7 @@ release_and_out:
return error;
}
-struct xattr_handler ext2_xattr_acl_access_handler = {
+const struct xattr_handler ext2_xattr_acl_access_handler = {
.prefix = POSIX_ACL_XATTR_ACCESS,
.flags = ACL_TYPE_ACCESS,
.list = ext2_xattr_list_acl_access,
@@ -428,7 +428,7 @@ struct xattr_handler ext2_xattr_acl_access_handler = {
.set = ext2_xattr_set_acl,
};
-struct xattr_handler ext2_xattr_acl_default_handler = {
+const struct xattr_handler ext2_xattr_acl_default_handler = {
.prefix = POSIX_ACL_XATTR_DEFAULT,
.flags = ACL_TYPE_DEFAULT,
.list = ext2_xattr_list_acl_default,
diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index 3cf038c055d7..e8766a396776 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -1332,6 +1332,12 @@ retry_alloc:
free_blocks = le16_to_cpu(gdp->bg_free_blocks_count);
/*
+ * skip this group (and avoid loading bitmap) if there
+ * are no free blocks
+ */
+ if (!free_blocks)
+ continue;
+ /*
* skip this group if the number of
* free blocks is less than half of the reservation
* window size.
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index 0b038e47ad2f..52b34f1d2738 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -122,7 +122,6 @@ extern int ext2_write_inode (struct inode *, struct writeback_control *);
extern void ext2_delete_inode (struct inode *);
extern int ext2_sync_inode (struct inode *);
extern int ext2_get_block(struct inode *, sector_t, struct buffer_head *, int);
-extern void ext2_truncate (struct inode *);
extern int ext2_setattr (struct dentry *, struct iattr *);
extern void ext2_set_inode_flags(struct inode *inode);
extern void ext2_get_inode_flags(struct ext2_inode_info *);
@@ -155,7 +154,7 @@ extern void ext2_write_super (struct super_block *);
extern const struct file_operations ext2_dir_operations;
/* file.c */
-extern int ext2_fsync(struct file *file, struct dentry *dentry, int datasync);
+extern int ext2_fsync(struct file *file, int datasync);
extern const struct inode_operations ext2_file_inode_operations;
extern const struct file_operations ext2_file_operations;
extern const struct file_operations ext2_xip_file_operations;
diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index 5d198d0697fb..49eec9456c5b 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -40,13 +40,13 @@ static int ext2_release_file (struct inode * inode, struct file * filp)
return 0;
}
-int ext2_fsync(struct file *file, struct dentry *dentry, int datasync)
+int ext2_fsync(struct file *file, int datasync)
{
int ret;
- struct super_block *sb = dentry->d_inode->i_sb;
+ struct super_block *sb = file->f_mapping->host->i_sb;
struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping;
- ret = simple_fsync(file, dentry, datasync);
+ ret = generic_file_fsync(file, datasync);
if (ret == -EIO || test_and_clear_bit(AS_EIO, &mapping->flags)) {
/* We don't really know where the IO error happened... */
ext2_error(sb, __func__,
@@ -95,7 +95,6 @@ const struct file_operations ext2_xip_file_operations = {
#endif
const struct inode_operations ext2_file_inode_operations = {
- .truncate = ext2_truncate,
#ifdef CONFIG_EXT2_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
diff --git a/fs/ext2/ialloc.c b/fs/ext2/ialloc.c
index ad7d572ee8dc..938dbc739d00 100644
--- a/fs/ext2/ialloc.c
+++ b/fs/ext2/ialloc.c
@@ -106,7 +106,7 @@ void ext2_free_inode (struct inode * inode)
struct super_block * sb = inode->i_sb;
int is_directory;
unsigned long ino;
- struct buffer_head *bitmap_bh = NULL;
+ struct buffer_head *bitmap_bh;
unsigned long block_group;
unsigned long bit;
struct ext2_super_block * es;
@@ -135,14 +135,13 @@ void ext2_free_inode (struct inode * inode)
ino > le32_to_cpu(es->s_inodes_count)) {
ext2_error (sb, "ext2_free_inode",
"reserved or nonexistent inode %lu", ino);
- goto error_return;
+ return;
}
block_group = (ino - 1) / EXT2_INODES_PER_GROUP(sb);
bit = (ino - 1) % EXT2_INODES_PER_GROUP(sb);
- brelse(bitmap_bh);
bitmap_bh = read_inode_bitmap(sb, block_group);
if (!bitmap_bh)
- goto error_return;
+ return;
/* Ok, now we can actually update the inode bitmaps.. */
if (!ext2_clear_bit_atomic(sb_bgl_lock(EXT2_SB(sb), block_group),
@@ -154,7 +153,7 @@ void ext2_free_inode (struct inode * inode)
mark_buffer_dirty(bitmap_bh);
if (sb->s_flags & MS_SYNCHRONOUS)
sync_dirty_buffer(bitmap_bh);
-error_return:
+
brelse(bitmap_bh);
}
@@ -550,16 +549,12 @@ got:
sb->s_dirt = 1;
mark_buffer_dirty(bh2);
- inode->i_uid = current_fsuid();
- if (test_opt (sb, GRPID))
- inode->i_gid = dir->i_gid;
- else if (dir->i_mode & S_ISGID) {
+ if (test_opt(sb, GRPID)) {
+ inode->i_mode = mode;
+ inode->i_uid = current_fsuid();
inode->i_gid = dir->i_gid;
- if (S_ISDIR(mode))
- mode |= S_ISGID;
} else
- inode->i_gid = current_fsgid();
- inode->i_mode = mode;
+ inode_init_owner(inode, dir, mode);
inode->i_ino = ino;
inode->i_blocks = 0;
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index fc13cc119aad..19214435b752 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -22,7 +22,6 @@
* Assorted race fixes, rewrite of ext2_get_block() by Al Viro, 2000
*/
-#include <linux/smp_lock.h>
#include <linux/time.h>
#include <linux/highuid.h>
#include <linux/pagemap.h>
@@ -55,6 +54,18 @@ static inline int ext2_inode_is_fast_symlink(struct inode *inode)
inode->i_blocks - ea_blocks == 0);
}
+static void ext2_truncate_blocks(struct inode *inode, loff_t offset);
+
+static void ext2_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size) {
+ truncate_pagecache(inode, to, inode->i_size);
+ ext2_truncate_blocks(inode, inode->i_size);
+ }
+}
+
/*
* Called at the last iput() if i_nlink is zero.
*/
@@ -72,7 +83,7 @@ void ext2_delete_inode (struct inode * inode)
inode->i_size = 0;
if (inode->i_blocks)
- ext2_truncate (inode);
+ ext2_truncate_blocks(inode, 0);
ext2_free_inode (inode);
return;
@@ -758,8 +769,8 @@ int __ext2_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
- return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
- ext2_get_block);
+ return block_write_begin_newtrunc(file, mapping, pos, len, flags,
+ pagep, fsdata, ext2_get_block);
}
static int
@@ -767,8 +778,25 @@ ext2_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
+ int ret;
+
*pagep = NULL;
- return __ext2_write_begin(file, mapping, pos, len, flags, pagep,fsdata);
+ ret = __ext2_write_begin(file, mapping, pos, len, flags, pagep, fsdata);
+ if (ret < 0)
+ ext2_write_failed(mapping, pos + len);
+ return ret;
+}
+
+static int ext2_write_end(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *page, void *fsdata)
+{
+ int ret;
+
+ ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata);
+ if (ret < len)
+ ext2_write_failed(mapping, pos + len);
+ return ret;
}
static int
@@ -776,13 +804,18 @@ ext2_nobh_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
+ int ret;
+
/*
* Dir-in-pagecache still uses ext2_write_begin. Would have to rework
* directory handling code to pass around offsets rather than struct
* pages in order to make this work easily.
*/
- return nobh_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
- ext2_get_block);
+ ret = nobh_write_begin_newtrunc(file, mapping, pos, len, flags, pagep,
+ fsdata, ext2_get_block);
+ if (ret < 0)
+ ext2_write_failed(mapping, pos + len);
+ return ret;
}
static int ext2_nobh_writepage(struct page *page,
@@ -801,10 +834,15 @@ ext2_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
loff_t offset, unsigned long nr_segs)
{
struct file *file = iocb->ki_filp;
- struct inode *inode = file->f_mapping->host;
-
- return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
- offset, nr_segs, ext2_get_block, NULL);
+ struct address_space *mapping = file->f_mapping;
+ struct inode *inode = mapping->host;
+ ssize_t ret;
+
+ ret = blockdev_direct_IO_newtrunc(rw, iocb, inode, inode->i_sb->s_bdev,
+ iov, offset, nr_segs, ext2_get_block, NULL);
+ if (ret < 0 && (rw & WRITE))
+ ext2_write_failed(mapping, offset + iov_length(iov, nr_segs));
+ return ret;
}
static int
@@ -819,7 +857,7 @@ const struct address_space_operations ext2_aops = {
.writepage = ext2_writepage,
.sync_page = block_sync_page,
.write_begin = ext2_write_begin,
- .write_end = generic_write_end,
+ .write_end = ext2_write_end,
.bmap = ext2_bmap,
.direct_IO = ext2_direct_IO,
.writepages = ext2_writepages,
@@ -1028,7 +1066,7 @@ static void ext2_free_branches(struct inode *inode, __le32 *p, __le32 *q, int de
ext2_free_data(inode, p, q);
}
-void ext2_truncate(struct inode *inode)
+static void __ext2_truncate_blocks(struct inode *inode, loff_t offset)
{
__le32 *i_data = EXT2_I(inode)->i_data;
struct ext2_inode_info *ei = EXT2_I(inode);
@@ -1040,27 +1078,8 @@ void ext2_truncate(struct inode *inode)
int n;
long iblock;
unsigned blocksize;
-
- if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
- S_ISLNK(inode->i_mode)))
- return;
- if (ext2_inode_is_fast_symlink(inode))
- return;
- if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
- return;
-
blocksize = inode->i_sb->s_blocksize;
- iblock = (inode->i_size + blocksize-1)
- >> EXT2_BLOCK_SIZE_BITS(inode->i_sb);
-
- if (mapping_is_xip(inode->i_mapping))
- xip_truncate_page(inode->i_mapping, inode->i_size);
- else if (test_opt(inode->i_sb, NOBH))
- nobh_truncate_page(inode->i_mapping,
- inode->i_size, ext2_get_block);
- else
- block_truncate_page(inode->i_mapping,
- inode->i_size, ext2_get_block);
+ iblock = (offset + blocksize-1) >> EXT2_BLOCK_SIZE_BITS(inode->i_sb);
n = ext2_block_to_path(inode, iblock, offsets, NULL);
if (n == 0)
@@ -1128,6 +1147,62 @@ do_indirects:
ext2_discard_reservation(inode);
mutex_unlock(&ei->truncate_mutex);
+}
+
+static void ext2_truncate_blocks(struct inode *inode, loff_t offset)
+{
+ /*
+ * XXX: it seems like a bug here that we don't allow
+ * IS_APPEND inode to have blocks-past-i_size trimmed off.
+ * review and fix this.
+ *
+ * Also would be nice to be able to handle IO errors and such,
+ * but that's probably too much to ask.
+ */
+ if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+ S_ISLNK(inode->i_mode)))
+ return;
+ if (ext2_inode_is_fast_symlink(inode))
+ return;
+ if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
+ return;
+ __ext2_truncate_blocks(inode, offset);
+}
+
+int ext2_setsize(struct inode *inode, loff_t newsize)
+{
+ loff_t oldsize;
+ int error;
+
+ error = inode_newsize_ok(inode, newsize);
+ if (error)
+ return error;
+
+ if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+ S_ISLNK(inode->i_mode)))
+ return -EINVAL;
+ if (ext2_inode_is_fast_symlink(inode))
+ return -EINVAL;
+ if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
+ return -EPERM;
+
+ if (mapping_is_xip(inode->i_mapping))
+ error = xip_truncate_page(inode->i_mapping, newsize);
+ else if (test_opt(inode->i_sb, NOBH))
+ error = nobh_truncate_page(inode->i_mapping,
+ newsize, ext2_get_block);
+ else
+ error = block_truncate_page(inode->i_mapping,
+ newsize, ext2_get_block);
+ if (error)
+ return error;
+
+ oldsize = inode->i_size;
+ i_size_write(inode, newsize);
+ truncate_pagecache(inode, oldsize, newsize);
+
+ __ext2_truncate_blocks(inode, newsize);
+
inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
if (inode_needs_sync(inode)) {
sync_mapping_buffers(inode->i_mapping);
@@ -1135,6 +1210,8 @@ do_indirects:
} else {
mark_inode_dirty(inode);
}
+
+ return 0;
}
static struct ext2_inode *ext2_get_inode(struct super_block *sb, ino_t ino,
@@ -1406,11 +1483,11 @@ static int __ext2_write_inode(struct inode *inode, int do_sync)
/* If this is the first large file
* created, add a flag to the superblock.
*/
- lock_kernel();
+ spin_lock(&EXT2_SB(sb)->s_lock);
ext2_update_dynamic_rev(sb);
EXT2_SET_RO_COMPAT_FEATURE(sb,
EXT2_FEATURE_RO_COMPAT_LARGE_FILE);
- unlock_kernel();
+ spin_unlock(&EXT2_SB(sb)->s_lock);
ext2_write_super(sb);
}
}
@@ -1467,7 +1544,7 @@ int ext2_setattr(struct dentry *dentry, struct iattr *iattr)
if (error)
return error;
- if (iattr->ia_valid & ATTR_SIZE)
+ if (is_quota_modification(inode, iattr))
dquot_initialize(inode);
if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) ||
(iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)) {
@@ -1475,8 +1552,15 @@ int ext2_setattr(struct dentry *dentry, struct iattr *iattr)
if (error)
return error;
}
- error = inode_setattr(inode, iattr);
- if (!error && (iattr->ia_valid & ATTR_MODE))
+ if (iattr->ia_valid & ATTR_SIZE) {
+ error = ext2_setsize(inode, iattr->ia_size);
+ if (error)
+ return error;
+ }
+ generic_setattr(inode, iattr);
+ if (iattr->ia_valid & ATTR_MODE)
error = ext2_acl_chmod(inode);
+ mark_inode_dirty(inode);
+
return error;
}
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 42e4a303b675..7ff43f4a59cd 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -26,7 +26,6 @@
#include <linux/random.h>
#include <linux/buffer_head.h>
#include <linux/exportfs.h>
-#include <linux/smp_lock.h>
#include <linux/vfs.h>
#include <linux/seq_file.h>
#include <linux/mount.h>
@@ -39,7 +38,7 @@
#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);
@@ -52,9 +51,11 @@ void ext2_error (struct super_block * sb, const char * function,
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(EXT2_ERROR_FS);
- ext2_sync_super(sb, es);
+ spin_unlock(&sbi->s_lock);
+ ext2_sync_super(sb, es, 1);
}
va_start(args, fmt);
@@ -84,6 +85,9 @@ void ext2_msg(struct super_block *sb, const char *prefix,
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;
@@ -115,7 +119,7 @@ static void ext2_put_super (struct super_block * sb)
int i;
struct ext2_sb_info *sbi = EXT2_SB(sb);
- lock_kernel();
+ dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
if (sb->s_dirt)
ext2_write_super(sb);
@@ -124,8 +128,10 @@ static void ext2_put_super (struct super_block * 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++)
@@ -140,8 +146,6 @@ static void ext2_put_super (struct super_block * sb)
sb->s_fs_info = NULL;
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
-
- unlock_kernel();
}
static struct kmem_cache * ext2_inode_cachep;
@@ -209,6 +213,7 @@ static int ext2_show_options(struct seq_file *seq, struct vfsmount *vfs)
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)
@@ -281,6 +286,7 @@ static int ext2_show_options(struct seq_file *seq, struct vfsmount *vfs)
if (!test_opt(sb, RESERVATION))
seq_puts(seq, ",noreservation");
+ spin_unlock(&sbi->s_lock);
return 0;
}
@@ -606,7 +612,6 @@ static int ext2_setup_super (struct super_block * sb,
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))
ext2_msg(sb, KERN_INFO, "%s, %s, bs=%lu, fs=%lu, gc=%lu, "
"bpg=%lu, ipg=%lu, mo=%04lx]",
@@ -767,6 +772,8 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
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
@@ -1058,6 +1065,12 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
sb->s_op = &ext2_sops;
sb->s_export_op = &ext2_export_ops;
sb->s_xattr = ext2_xattr_handlers;
+
+#ifdef CONFIG_QUOTA
+ sb->dq_op = &dquot_operations;
+ sb->s_qcop = &dquot_quotactl_ops;
+#endif
+
root = ext2_iget(sb, EXT2_ROOT_INO);
if (IS_ERR(root)) {
ret = PTR_ERR(root);
@@ -1079,7 +1092,9 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
if (EXT2_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL))
ext2_msg(sb, KERN_WARNING,
"warning: mounting ext3 filesystem as ext2");
- ext2_setup_super (sb, es, sb->s_flags & MS_RDONLY);
+ if (ext2_setup_super (sb, es, sb->s_flags & MS_RDONLY))
+ sb->s_flags |= MS_RDONLY;
+ ext2_write_super(sb);
return 0;
cantfind_ext2:
@@ -1120,30 +1135,26 @@ static void ext2_clear_super_error(struct super_block *sb)
* be remapped. Nothing we can do but to retry the
* write and hope for the best.
*/
- printk(KERN_ERR "EXT2-fs: %s previous I/O error to "
- "superblock detected", sb->s_id);
+ 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_commit_super (struct super_block * sb,
- struct ext2_super_block * es)
-{
- ext2_clear_super_error(sb);
- es->s_wtime = cpu_to_le32(get_seconds());
- mark_buffer_dirty(EXT2_SB(sb)->s_sbh);
- sb->s_dirt = 0;
-}
-
-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;
}
@@ -1157,43 +1168,18 @@ static void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es)
* may have been checked while mounted and e2fsck may have
* set s_state to EXT2_VALID_FS after some corrections.
*/
-
static int ext2_sync_fs(struct super_block *sb, int wait)
{
+ struct ext2_sb_info *sbi = EXT2_SB(sb);
struct ext2_super_block *es = EXT2_SB(sb)->s_es;
- struct buffer_head *sbh = EXT2_SB(sb)->s_sbh;
-
- lock_kernel();
- 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);
- }
+ 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);
- 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);
}
- sb->s_dirt = 0;
- unlock_kernel();
-
+ spin_unlock(&sbi->s_lock);
+ ext2_sync_super(sb, es, wait);
return 0;
}
@@ -1215,7 +1201,7 @@ 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;
@@ -1254,21 +1240,31 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
sbi->s_mount_opt |= old_mount_opt & EXT2_MOUNT_XIP;
}
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
- unlock_kernel();
+ spin_unlock(&sbi->s_lock);
return 0;
}
if (*flags & MS_RDONLY) {
if (le16_to_cpu(es->s_state) & EXT2_VALID_FS ||
!(sbi->s_mount_state & EXT2_VALID_FS)) {
- unlock_kernel();
+ spin_unlock(&sbi->s_lock);
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);
+
+ err = dquot_suspend(sb, -1);
+ if (err < 0) {
+ spin_lock(&sbi->s_lock);
+ goto restore_opts;
+ }
+
+ ext2_sync_super(sb, es, 1);
} else {
__le32 ret = EXT2_HAS_RO_COMPAT_FEATURE(sb,
~EXT2_FEATURE_RO_COMPAT_SUPP);
@@ -1288,16 +1284,20 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
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);
+
+ dquot_resume(sb, -1);
}
- 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;
- unlock_kernel();
+ spin_unlock(&sbi->s_lock);
return err;
}
@@ -1308,6 +1308,8 @@ static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf)
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)) {
@@ -1362,6 +1364,7 @@ static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf)
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;
}
diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c
index e44dc92609be..7c3915780b19 100644
--- a/fs/ext2/xattr.c
+++ b/fs/ext2/xattr.c
@@ -101,7 +101,7 @@ static void ext2_xattr_rehash(struct ext2_xattr_header *,
static struct mb_cache *ext2_xattr_cache;
-static struct xattr_handler *ext2_xattr_handler_map[] = {
+static const struct xattr_handler *ext2_xattr_handler_map[] = {
[EXT2_XATTR_INDEX_USER] = &ext2_xattr_user_handler,
#ifdef CONFIG_EXT2_FS_POSIX_ACL
[EXT2_XATTR_INDEX_POSIX_ACL_ACCESS] = &ext2_xattr_acl_access_handler,
@@ -113,7 +113,7 @@ static struct xattr_handler *ext2_xattr_handler_map[] = {
#endif
};
-struct xattr_handler *ext2_xattr_handlers[] = {
+const struct xattr_handler *ext2_xattr_handlers[] = {
&ext2_xattr_user_handler,
&ext2_xattr_trusted_handler,
#ifdef CONFIG_EXT2_FS_POSIX_ACL
@@ -126,10 +126,10 @@ struct xattr_handler *ext2_xattr_handlers[] = {
NULL
};
-static inline struct xattr_handler *
+static inline const struct xattr_handler *
ext2_xattr_handler(int name_index)
{
- struct xattr_handler *handler = NULL;
+ const struct xattr_handler *handler = NULL;
if (name_index > 0 && name_index < ARRAY_SIZE(ext2_xattr_handler_map))
handler = ext2_xattr_handler_map[name_index];
@@ -298,7 +298,7 @@ bad_block: ext2_error(inode->i_sb, "ext2_xattr_list",
/* list the attribute names */
for (entry = FIRST_ENTRY(bh); !IS_LAST_ENTRY(entry);
entry = EXT2_XATTR_NEXT(entry)) {
- struct xattr_handler *handler =
+ const struct xattr_handler *handler =
ext2_xattr_handler(entry->e_name_index);
if (handler) {
@@ -345,7 +345,9 @@ static void ext2_xattr_update_super_block(struct super_block *sb)
if (EXT2_HAS_COMPAT_FEATURE(sb, EXT2_FEATURE_COMPAT_EXT_ATTR))
return;
+ spin_lock(&EXT2_SB(sb)->s_lock);
EXT2_SET_COMPAT_FEATURE(sb, EXT2_FEATURE_COMPAT_EXT_ATTR);
+ spin_unlock(&EXT2_SB(sb)->s_lock);
sb->s_dirt = 1;
mark_buffer_dirty(EXT2_SB(sb)->s_sbh);
}
diff --git a/fs/ext2/xattr.h b/fs/ext2/xattr.h
index bf8175b2ced9..a1a1c2184616 100644
--- a/fs/ext2/xattr.h
+++ b/fs/ext2/xattr.h
@@ -55,11 +55,11 @@ struct ext2_xattr_entry {
# ifdef CONFIG_EXT2_FS_XATTR
-extern struct xattr_handler ext2_xattr_user_handler;
-extern struct xattr_handler ext2_xattr_trusted_handler;
-extern struct xattr_handler ext2_xattr_acl_access_handler;
-extern struct xattr_handler ext2_xattr_acl_default_handler;
-extern struct xattr_handler ext2_xattr_security_handler;
+extern const struct xattr_handler ext2_xattr_user_handler;
+extern const struct xattr_handler ext2_xattr_trusted_handler;
+extern const struct xattr_handler ext2_xattr_acl_access_handler;
+extern const struct xattr_handler ext2_xattr_acl_default_handler;
+extern const struct xattr_handler ext2_xattr_security_handler;
extern ssize_t ext2_listxattr(struct dentry *, char *, size_t);
@@ -72,7 +72,7 @@ extern void ext2_xattr_put_super(struct super_block *);
extern int init_ext2_xattr(void);
extern void exit_ext2_xattr(void);
-extern struct xattr_handler *ext2_xattr_handlers[];
+extern const struct xattr_handler *ext2_xattr_handlers[];
# else /* CONFIG_EXT2_FS_XATTR */
diff --git a/fs/ext2/xattr_security.c b/fs/ext2/xattr_security.c
index b118c6383c6d..3004e15d5da5 100644
--- a/fs/ext2/xattr_security.c
+++ b/fs/ext2/xattr_security.c
@@ -67,7 +67,7 @@ ext2_init_security(struct inode *inode, struct inode *dir)
return err;
}
-struct xattr_handler ext2_xattr_security_handler = {
+const struct xattr_handler ext2_xattr_security_handler = {
.prefix = XATTR_SECURITY_PREFIX,
.list = ext2_xattr_security_list,
.get = ext2_xattr_security_get,
diff --git a/fs/ext2/xattr_trusted.c b/fs/ext2/xattr_trusted.c
index 2a26d71f4771..667e46a8d62d 100644
--- a/fs/ext2/xattr_trusted.c
+++ b/fs/ext2/xattr_trusted.c
@@ -50,7 +50,7 @@ ext2_xattr_trusted_set(struct dentry *dentry, const char *name,
value, size, flags);
}
-struct xattr_handler ext2_xattr_trusted_handler = {
+const struct xattr_handler ext2_xattr_trusted_handler = {
.prefix = XATTR_TRUSTED_PREFIX,
.list = ext2_xattr_trusted_list,
.get = ext2_xattr_trusted_get,
diff --git a/fs/ext2/xattr_user.c b/fs/ext2/xattr_user.c
index 3f6caf3684b4..099d20f47163 100644
--- a/fs/ext2/xattr_user.c
+++ b/fs/ext2/xattr_user.c
@@ -54,7 +54,7 @@ ext2_xattr_user_set(struct dentry *dentry, const char *name,
name, value, size, flags);
}
-struct xattr_handler ext2_xattr_user_handler = {
+const struct xattr_handler ext2_xattr_user_handler = {
.prefix = XATTR_USER_PREFIX,
.list = ext2_xattr_user_list,
.get = ext2_xattr_user_get,
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-06 09:46:41 +0300