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Diffstat (limited to 'fs/ext2/super.c')
-rw-r--r--fs/ext2/super.c205
1 files changed, 103 insertions, 102 deletions
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 1458706bd2ec..de1694512f1f 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -33,6 +33,7 @@
#include <linux/quotaops.h>
#include <linux/uaccess.h>
#include <linux/dax.h>
+#include <linux/iversion.h>
#include "ext2.h"
#include "xattr.h"
#include "acl.h"
@@ -75,7 +76,7 @@ void ext2_error(struct super_block *sb, const char *function,
if (test_opt(sb, ERRORS_RO)) {
ext2_msg(sb, KERN_CRIT,
"error: remounting filesystem read-only");
- sb->s_flags |= MS_RDONLY;
+ sb->s_flags |= SB_RDONLY;
}
}
@@ -184,7 +185,7 @@ static struct inode *ext2_alloc_inode(struct super_block *sb)
if (!ei)
return NULL;
ei->i_block_alloc_info = NULL;
- ei->vfs_inode.i_version = 1;
+ inode_set_iversion(&ei->vfs_inode, 1);
#ifdef CONFIG_QUOTA
memset(&ei->i_dquot, 0, sizeof(ei->i_dquot));
#endif
@@ -220,11 +221,13 @@ static void init_once(void *foo)
static int __init init_inodecache(void)
{
- ext2_inode_cachep = kmem_cache_create("ext2_inode_cache",
- sizeof(struct ext2_inode_info),
- 0, (SLAB_RECLAIM_ACCOUNT|
- SLAB_MEM_SPREAD|SLAB_ACCOUNT),
- init_once);
+ ext2_inode_cachep = kmem_cache_create_usercopy("ext2_inode_cache",
+ sizeof(struct ext2_inode_info), 0,
+ (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
+ SLAB_ACCOUNT),
+ offsetof(struct ext2_inode_info, i_data),
+ sizeof_field(struct ext2_inode_info, i_data),
+ init_once);
if (ext2_inode_cachep == NULL)
return -ENOMEM;
return 0;
@@ -479,10 +482,10 @@ static const match_table_t tokens = {
{Opt_err, NULL}
};
-static int parse_options(char *options, struct super_block *sb)
+static int parse_options(char *options, struct super_block *sb,
+ struct ext2_mount_options *opts)
{
char *p;
- struct ext2_sb_info *sbi = EXT2_SB(sb);
substring_t args[MAX_OPT_ARGS];
int option;
kuid_t uid;
@@ -499,16 +502,16 @@ static int parse_options(char *options, struct super_block *sb)
token = match_token(p, tokens, args);
switch (token) {
case Opt_bsd_df:
- clear_opt (sbi->s_mount_opt, MINIX_DF);
+ clear_opt (opts->s_mount_opt, MINIX_DF);
break;
case Opt_minix_df:
- set_opt (sbi->s_mount_opt, MINIX_DF);
+ set_opt (opts->s_mount_opt, MINIX_DF);
break;
case Opt_grpid:
- set_opt (sbi->s_mount_opt, GRPID);
+ set_opt (opts->s_mount_opt, GRPID);
break;
case Opt_nogrpid:
- clear_opt (sbi->s_mount_opt, GRPID);
+ clear_opt (opts->s_mount_opt, GRPID);
break;
case Opt_resuid:
if (match_int(&args[0], &option))
@@ -519,7 +522,7 @@ static int parse_options(char *options, struct super_block *sb)
return 0;
}
- sbi->s_resuid = uid;
+ opts->s_resuid = uid;
break;
case Opt_resgid:
if (match_int(&args[0], &option))
@@ -529,51 +532,51 @@ static int parse_options(char *options, struct super_block *sb)
ext2_msg(sb, KERN_ERR, "Invalid gid value %d", option);
return 0;
}
- sbi->s_resgid = gid;
+ opts->s_resgid = gid;
break;
case Opt_sb:
/* handled by get_sb_block() instead of here */
/* *sb_block = match_int(&args[0]); */
break;
case Opt_err_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);
+ clear_opt (opts->s_mount_opt, ERRORS_CONT);
+ clear_opt (opts->s_mount_opt, ERRORS_RO);
+ set_opt (opts->s_mount_opt, ERRORS_PANIC);
break;
case Opt_err_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);
+ clear_opt (opts->s_mount_opt, ERRORS_CONT);
+ clear_opt (opts->s_mount_opt, ERRORS_PANIC);
+ set_opt (opts->s_mount_opt, ERRORS_RO);
break;
case Opt_err_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);
+ clear_opt (opts->s_mount_opt, ERRORS_RO);
+ clear_opt (opts->s_mount_opt, ERRORS_PANIC);
+ set_opt (opts->s_mount_opt, ERRORS_CONT);
break;
case Opt_nouid32:
- set_opt (sbi->s_mount_opt, NO_UID32);
+ set_opt (opts->s_mount_opt, NO_UID32);
break;
case Opt_nocheck:
- clear_opt (sbi->s_mount_opt, CHECK);
+ clear_opt (opts->s_mount_opt, CHECK);
break;
case Opt_debug:
- set_opt (sbi->s_mount_opt, DEBUG);
+ set_opt (opts->s_mount_opt, DEBUG);
break;
case Opt_oldalloc:
- set_opt (sbi->s_mount_opt, OLDALLOC);
+ set_opt (opts->s_mount_opt, OLDALLOC);
break;
case Opt_orlov:
- clear_opt (sbi->s_mount_opt, OLDALLOC);
+ clear_opt (opts->s_mount_opt, OLDALLOC);
break;
case Opt_nobh:
- set_opt (sbi->s_mount_opt, NOBH);
+ set_opt (opts->s_mount_opt, NOBH);
break;
#ifdef CONFIG_EXT2_FS_XATTR
case Opt_user_xattr:
- set_opt (sbi->s_mount_opt, XATTR_USER);
+ set_opt (opts->s_mount_opt, XATTR_USER);
break;
case Opt_nouser_xattr:
- clear_opt (sbi->s_mount_opt, XATTR_USER);
+ clear_opt (opts->s_mount_opt, XATTR_USER);
break;
#else
case Opt_user_xattr:
@@ -584,10 +587,10 @@ static int parse_options(char *options, struct super_block *sb)
#endif
#ifdef CONFIG_EXT2_FS_POSIX_ACL
case Opt_acl:
- set_opt(sbi->s_mount_opt, POSIX_ACL);
+ set_opt(opts->s_mount_opt, POSIX_ACL);
break;
case Opt_noacl:
- clear_opt(sbi->s_mount_opt, POSIX_ACL);
+ clear_opt(opts->s_mount_opt, POSIX_ACL);
break;
#else
case Opt_acl:
@@ -598,13 +601,13 @@ static int parse_options(char *options, struct super_block *sb)
#endif
case Opt_xip:
ext2_msg(sb, KERN_INFO, "use dax instead of xip");
- set_opt(sbi->s_mount_opt, XIP);
+ set_opt(opts->s_mount_opt, XIP);
/* Fall through */
case Opt_dax:
#ifdef CONFIG_FS_DAX
ext2_msg(sb, KERN_WARNING,
"DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
- set_opt(sbi->s_mount_opt, DAX);
+ set_opt(opts->s_mount_opt, DAX);
#else
ext2_msg(sb, KERN_INFO, "dax option not supported");
#endif
@@ -613,11 +616,11 @@ static int parse_options(char *options, struct super_block *sb)
#if defined(CONFIG_QUOTA)
case Opt_quota:
case Opt_usrquota:
- set_opt(sbi->s_mount_opt, USRQUOTA);
+ set_opt(opts->s_mount_opt, USRQUOTA);
break;
case Opt_grpquota:
- set_opt(sbi->s_mount_opt, GRPQUOTA);
+ set_opt(opts->s_mount_opt, GRPQUOTA);
break;
#else
case Opt_quota:
@@ -629,11 +632,11 @@ static int parse_options(char *options, struct super_block *sb)
#endif
case Opt_reservation:
- set_opt(sbi->s_mount_opt, RESERVATION);
+ set_opt(opts->s_mount_opt, RESERVATION);
ext2_msg(sb, KERN_INFO, "reservations ON");
break;
case Opt_noreservation:
- clear_opt(sbi->s_mount_opt, RESERVATION);
+ clear_opt(opts->s_mount_opt, RESERVATION);
ext2_msg(sb, KERN_INFO, "reservations OFF");
break;
case Opt_ignore:
@@ -656,7 +659,7 @@ static int ext2_setup_super (struct super_block * sb,
ext2_msg(sb, KERN_ERR,
"error: revision level too high, "
"forcing read-only mode");
- res = MS_RDONLY;
+ res = SB_RDONLY;
}
if (read_only)
return res;
@@ -824,14 +827,14 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
unsigned long logic_sb_block;
unsigned long offset = 0;
unsigned long def_mount_opts;
- long ret = -EINVAL;
+ long ret = -ENOMEM;
int blocksize = BLOCK_SIZE;
int db_count;
int i, j;
__le32 features;
int err;
+ struct ext2_mount_options opts;
- err = -ENOMEM;
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
goto failed;
@@ -847,6 +850,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_daxdev = dax_dev;
spin_lock_init(&sbi->s_lock);
+ ret = -EINVAL;
/*
* See what the current blocksize for the device is, and
@@ -890,38 +894,42 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
/* Set defaults before we parse the mount options */
def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
if (def_mount_opts & EXT2_DEFM_DEBUG)
- set_opt(sbi->s_mount_opt, DEBUG);
+ set_opt(opts.s_mount_opt, DEBUG);
if (def_mount_opts & EXT2_DEFM_BSDGROUPS)
- set_opt(sbi->s_mount_opt, GRPID);
+ set_opt(opts.s_mount_opt, GRPID);
if (def_mount_opts & EXT2_DEFM_UID16)
- set_opt(sbi->s_mount_opt, NO_UID32);
+ set_opt(opts.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);
+ set_opt(opts.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);
+ set_opt(opts.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);
+ set_opt(opts.s_mount_opt, ERRORS_PANIC);
else if (le16_to_cpu(sbi->s_es->s_errors) == EXT2_ERRORS_CONTINUE)
- set_opt(sbi->s_mount_opt, ERRORS_CONT);
+ set_opt(opts.s_mount_opt, ERRORS_CONT);
else
- set_opt(sbi->s_mount_opt, ERRORS_RO);
+ set_opt(opts.s_mount_opt, ERRORS_RO);
- sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid));
- sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid));
+ opts.s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid));
+ opts.s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid));
- set_opt(sbi->s_mount_opt, RESERVATION);
+ set_opt(opts.s_mount_opt, RESERVATION);
- if (!parse_options((char *) data, sb))
+ if (!parse_options((char *) data, sb, &opts))
goto failed_mount;
- sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
+ sbi->s_mount_opt = opts.s_mount_opt;
+ sbi->s_resuid = opts.s_resuid;
+ sbi->s_resgid = opts.s_resgid;
+
+ sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
((EXT2_SB(sb)->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ?
- MS_POSIXACL : 0);
+ SB_POSIXACL : 0);
sb->s_iflags |= SB_I_CGROUPWB;
if (le32_to_cpu(es->s_rev_level) == EXT2_GOOD_OLD_REV &&
@@ -954,8 +962,11 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
if (sbi->s_mount_opt & EXT2_MOUNT_DAX) {
err = bdev_dax_supported(sb, blocksize);
- if (err)
- goto failed_mount;
+ if (err) {
+ ext2_msg(sb, KERN_ERR,
+ "DAX unsupported by block device. Turning off DAX.");
+ sbi->s_mount_opt &= ~EXT2_MOUNT_DAX;
+ }
}
/* If the blocksize doesn't match, re-read the thing.. */
@@ -1173,7 +1184,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
ext2_msg(sb, KERN_WARNING,
"warning: mounting ext3 filesystem as ext2");
if (ext2_setup_super (sb, es, sb_rdonly(sb)))
- sb->s_flags |= MS_RDONLY;
+ sb->s_flags |= SB_RDONLY;
ext2_write_super(sb);
return 0;
@@ -1220,7 +1231,7 @@ static void ext2_clear_super_error(struct super_block *sb)
* write and hope for the best.
*/
ext2_msg(sb, KERN_ERR,
- "previous I/O error to superblock detected\n");
+ "previous I/O error to superblock detected");
clear_buffer_write_io_error(sbh);
set_buffer_uptodate(sbh);
}
@@ -1312,46 +1323,36 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
{
struct ext2_sb_info * sbi = EXT2_SB(sb);
struct ext2_super_block * es;
- struct ext2_mount_options old_opts;
- unsigned long old_sb_flags;
+ struct ext2_mount_options new_opts;
int err;
sync_filesystem(sb);
- spin_lock(&sbi->s_lock);
- /* 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;
+ spin_lock(&sbi->s_lock);
+ new_opts.s_mount_opt = sbi->s_mount_opt;
+ new_opts.s_resuid = sbi->s_resuid;
+ new_opts.s_resgid = sbi->s_resgid;
+ spin_unlock(&sbi->s_lock);
/*
* Allow the "check" option to be passed as a remount option.
*/
- if (!parse_options(data, sb)) {
- err = -EINVAL;
- goto restore_opts;
- }
-
- sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
- ((sbi->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
+ if (!parse_options(data, sb, &new_opts))
+ return -EINVAL;
+ spin_lock(&sbi->s_lock);
es = sbi->s_es;
- if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT2_MOUNT_DAX) {
+ if ((sbi->s_mount_opt ^ new_opts.s_mount_opt) & EXT2_MOUNT_DAX) {
ext2_msg(sb, KERN_WARNING, "warning: refusing change of "
"dax flag with busy inodes while remounting");
- sbi->s_mount_opt ^= EXT2_MOUNT_DAX;
- }
- if ((bool)(*flags & MS_RDONLY) == sb_rdonly(sb)) {
- spin_unlock(&sbi->s_lock);
- return 0;
+ new_opts.s_mount_opt ^= EXT2_MOUNT_DAX;
}
- if (*flags & MS_RDONLY) {
+ if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb))
+ goto out_set;
+ if (*flags & SB_RDONLY) {
if (le16_to_cpu(es->s_state) & EXT2_VALID_FS ||
- !(sbi->s_mount_state & EXT2_VALID_FS)) {
- spin_unlock(&sbi->s_lock);
- return 0;
- }
+ !(sbi->s_mount_state & EXT2_VALID_FS))
+ goto out_set;
/*
* OK, we are remounting a valid rw partition rdonly, so set
@@ -1362,22 +1363,20 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
spin_unlock(&sbi->s_lock);
err = dquot_suspend(sb, -1);
- if (err < 0) {
- spin_lock(&sbi->s_lock);
- goto restore_opts;
- }
+ if (err < 0)
+ return err;
ext2_sync_super(sb, es, 1);
} else {
__le32 ret = EXT2_HAS_RO_COMPAT_FEATURE(sb,
~EXT2_FEATURE_RO_COMPAT_SUPP);
if (ret) {
+ spin_unlock(&sbi->s_lock);
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;
+ return -EROFS;
}
/*
* Mounting a RDONLY partition read-write, so reread and
@@ -1386,7 +1385,7 @@ 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;
+ sb->s_flags &= ~SB_RDONLY;
spin_unlock(&sbi->s_lock);
ext2_write_super(sb);
@@ -1394,14 +1393,16 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
dquot_resume(sb, -1);
}
- 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_lock(&sbi->s_lock);
+out_set:
+ sbi->s_mount_opt = new_opts.s_mount_opt;
+ sbi->s_resuid = new_opts.s_resuid;
+ sbi->s_resgid = new_opts.s_resgid;
+ sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
+ ((sbi->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0);
spin_unlock(&sbi->s_lock);
- return err;
+
+ return 0;
}
static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf)
@@ -1574,7 +1575,7 @@ out:
return err;
if (inode->i_size < off+len-towrite)
i_size_write(inode, off+len-towrite);
- inode->i_version++;
+ inode_inc_iversion(inode);
inode->i_mtime = inode->i_ctime = current_time(inode);
mark_inode_dirty(inode);
return len - towrite;
generated by cgit (git 2.34.1) at 2024-05-23 17:33:00 +0000