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-rw-r--r--fs/ext4/super.c1913
1 files changed, 1200 insertions, 713 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 4e33b5eca694..9a936ecbaa3b 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -47,6 +47,8 @@
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/fsnotify.h>
+#include <linux/fs_context.h>
+#include <linux/fs_parser.h>
#include "ext4.h"
#include "ext4_extents.h" /* Needed for trace points definition */
@@ -73,12 +75,9 @@ static int ext4_mark_recovery_complete(struct super_block *sb,
static int ext4_clear_journal_err(struct super_block *sb,
struct ext4_super_block *es);
static int ext4_sync_fs(struct super_block *sb, int wait);
-static int ext4_remount(struct super_block *sb, int *flags, char *data);
static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf);
static int ext4_unfreeze(struct super_block *sb);
static int ext4_freeze(struct super_block *sb);
-static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data);
static inline int ext2_feature_set_ok(struct super_block *sb);
static inline int ext3_feature_set_ok(struct super_block *sb);
static void ext4_destroy_lazyinit_thread(void);
@@ -86,6 +85,16 @@ static void ext4_unregister_li_request(struct super_block *sb);
static void ext4_clear_request_list(void);
static struct inode *ext4_get_journal_inode(struct super_block *sb,
unsigned int journal_inum);
+static int ext4_validate_options(struct fs_context *fc);
+static int ext4_check_opt_consistency(struct fs_context *fc,
+ struct super_block *sb);
+static int ext4_apply_options(struct fs_context *fc, struct super_block *sb);
+static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param);
+static int ext4_get_tree(struct fs_context *fc);
+static int ext4_reconfigure(struct fs_context *fc);
+static void ext4_fc_free(struct fs_context *fc);
+static int ext4_init_fs_context(struct fs_context *fc);
+static const struct fs_parameter_spec ext4_param_specs[];
/*
* Lock ordering
@@ -113,13 +122,22 @@ static struct inode *ext4_get_journal_inode(struct super_block *sb,
* transaction start -> page lock(s) -> i_data_sem (rw)
*/
+static const struct fs_context_operations ext4_context_ops = {
+ .parse_param = ext4_parse_param,
+ .get_tree = ext4_get_tree,
+ .reconfigure = ext4_reconfigure,
+ .free = ext4_fc_free,
+};
+
+
#if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2)
static struct file_system_type ext2_fs_type = {
- .owner = THIS_MODULE,
- .name = "ext2",
- .mount = ext4_mount,
- .kill_sb = kill_block_super,
- .fs_flags = FS_REQUIRES_DEV,
+ .owner = THIS_MODULE,
+ .name = "ext2",
+ .init_fs_context = ext4_init_fs_context,
+ .parameters = ext4_param_specs,
+ .kill_sb = kill_block_super,
+ .fs_flags = FS_REQUIRES_DEV,
};
MODULE_ALIAS_FS("ext2");
MODULE_ALIAS("ext2");
@@ -130,11 +148,12 @@ MODULE_ALIAS("ext2");
static struct file_system_type ext3_fs_type = {
- .owner = THIS_MODULE,
- .name = "ext3",
- .mount = ext4_mount,
- .kill_sb = kill_block_super,
- .fs_flags = FS_REQUIRES_DEV,
+ .owner = THIS_MODULE,
+ .name = "ext3",
+ .init_fs_context = ext4_init_fs_context,
+ .parameters = ext4_param_specs,
+ .kill_sb = kill_block_super,
+ .fs_flags = FS_REQUIRES_DEV,
};
MODULE_ALIAS_FS("ext3");
MODULE_ALIAS("ext3");
@@ -260,8 +279,8 @@ static int ext4_verify_csum_type(struct super_block *sb,
return es->s_checksum_type == EXT4_CRC32C_CHKSUM;
}
-static __le32 ext4_superblock_csum(struct super_block *sb,
- struct ext4_super_block *es)
+__le32 ext4_superblock_csum(struct super_block *sb,
+ struct ext4_super_block *es)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
int offset = offsetof(struct ext4_super_block, s_checksum);
@@ -912,14 +931,20 @@ void __ext4_msg(struct super_block *sb,
struct va_format vaf;
va_list args;
- atomic_inc(&EXT4_SB(sb)->s_msg_count);
- if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs"))
- return;
+ if (sb) {
+ atomic_inc(&EXT4_SB(sb)->s_msg_count);
+ if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state),
+ "EXT4-fs"))
+ return;
+ }
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
- printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf);
+ if (sb)
+ printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf);
+ else
+ printk("%sEXT4-fs: %pV\n", prefix, &vaf);
va_end(args);
}
@@ -1647,7 +1672,6 @@ static const struct super_operations ext4_sops = {
.freeze_fs = ext4_freeze,
.unfreeze_fs = ext4_unfreeze,
.statfs = ext4_statfs,
- .remount_fs = ext4_remount,
.show_options = ext4_show_options,
#ifdef CONFIG_QUOTA
.quota_read = ext4_quota_read,
@@ -1665,7 +1689,7 @@ static const struct export_operations ext4_export_ops = {
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_resgid, Opt_resuid, Opt_sb,
Opt_nouid32, Opt_debug, Opt_removed,
Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload,
@@ -1674,152 +1698,169 @@ enum {
Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption,
Opt_inlinecrypt,
- Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
- Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota,
+ Opt_usrjquota, Opt_grpjquota, Opt_quota,
Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err,
Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version,
Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never,
Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error,
- Opt_nowarn_on_error, Opt_mblk_io_submit,
- Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize,
+ Opt_nowarn_on_error, Opt_mblk_io_submit, Opt_debug_want_extra_isize,
Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity,
Opt_inode_readahead_blks, Opt_journal_ioprio,
Opt_dioread_nolock, Opt_dioread_lock,
Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable,
Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache,
Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan,
+ Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type,
#ifdef CONFIG_EXT4_DEBUG
Opt_fc_debug_max_replay, Opt_fc_debug_force
#endif
};
-static const match_table_t tokens = {
- {Opt_bsd_df, "bsddf"},
- {Opt_minix_df, "minixdf"},
- {Opt_grpid, "grpid"},
- {Opt_grpid, "bsdgroups"},
- {Opt_nogrpid, "nogrpid"},
- {Opt_nogrpid, "sysvgroups"},
- {Opt_resgid, "resgid=%u"},
- {Opt_resuid, "resuid=%u"},
- {Opt_sb, "sb=%u"},
- {Opt_err_cont, "errors=continue"},
- {Opt_err_panic, "errors=panic"},
- {Opt_err_ro, "errors=remount-ro"},
- {Opt_nouid32, "nouid32"},
- {Opt_debug, "debug"},
- {Opt_removed, "oldalloc"},
- {Opt_removed, "orlov"},
- {Opt_user_xattr, "user_xattr"},
- {Opt_nouser_xattr, "nouser_xattr"},
- {Opt_acl, "acl"},
- {Opt_noacl, "noacl"},
- {Opt_noload, "norecovery"},
- {Opt_noload, "noload"},
- {Opt_removed, "nobh"},
- {Opt_removed, "bh"},
- {Opt_commit, "commit=%u"},
- {Opt_min_batch_time, "min_batch_time=%u"},
- {Opt_max_batch_time, "max_batch_time=%u"},
- {Opt_journal_dev, "journal_dev=%u"},
- {Opt_journal_path, "journal_path=%s"},
- {Opt_journal_checksum, "journal_checksum"},
- {Opt_nojournal_checksum, "nojournal_checksum"},
- {Opt_journal_async_commit, "journal_async_commit"},
- {Opt_abort, "abort"},
- {Opt_data_journal, "data=journal"},
- {Opt_data_ordered, "data=ordered"},
- {Opt_data_writeback, "data=writeback"},
- {Opt_data_err_abort, "data_err=abort"},
- {Opt_data_err_ignore, "data_err=ignore"},
- {Opt_offusrjquota, "usrjquota="},
- {Opt_usrjquota, "usrjquota=%s"},
- {Opt_offgrpjquota, "grpjquota="},
- {Opt_grpjquota, "grpjquota=%s"},
- {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
- {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
- {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
- {Opt_grpquota, "grpquota"},
- {Opt_noquota, "noquota"},
- {Opt_quota, "quota"},
- {Opt_usrquota, "usrquota"},
- {Opt_prjquota, "prjquota"},
- {Opt_barrier, "barrier=%u"},
- {Opt_barrier, "barrier"},
- {Opt_nobarrier, "nobarrier"},
- {Opt_i_version, "i_version"},
- {Opt_dax, "dax"},
- {Opt_dax_always, "dax=always"},
- {Opt_dax_inode, "dax=inode"},
- {Opt_dax_never, "dax=never"},
- {Opt_stripe, "stripe=%u"},
- {Opt_delalloc, "delalloc"},
- {Opt_warn_on_error, "warn_on_error"},
- {Opt_nowarn_on_error, "nowarn_on_error"},
- {Opt_lazytime, "lazytime"},
- {Opt_nolazytime, "nolazytime"},
- {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"},
- {Opt_nodelalloc, "nodelalloc"},
- {Opt_removed, "mblk_io_submit"},
- {Opt_removed, "nomblk_io_submit"},
- {Opt_block_validity, "block_validity"},
- {Opt_noblock_validity, "noblock_validity"},
- {Opt_inode_readahead_blks, "inode_readahead_blks=%u"},
- {Opt_journal_ioprio, "journal_ioprio=%u"},
- {Opt_auto_da_alloc, "auto_da_alloc=%u"},
- {Opt_auto_da_alloc, "auto_da_alloc"},
- {Opt_noauto_da_alloc, "noauto_da_alloc"},
- {Opt_dioread_nolock, "dioread_nolock"},
- {Opt_dioread_lock, "nodioread_nolock"},
- {Opt_dioread_lock, "dioread_lock"},
- {Opt_discard, "discard"},
- {Opt_nodiscard, "nodiscard"},
- {Opt_init_itable, "init_itable=%u"},
- {Opt_init_itable, "init_itable"},
- {Opt_noinit_itable, "noinit_itable"},
-#ifdef CONFIG_EXT4_DEBUG
- {Opt_fc_debug_force, "fc_debug_force"},
- {Opt_fc_debug_max_replay, "fc_debug_max_replay=%u"},
-#endif
- {Opt_max_dir_size_kb, "max_dir_size_kb=%u"},
- {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
- {Opt_test_dummy_encryption, "test_dummy_encryption"},
- {Opt_inlinecrypt, "inlinecrypt"},
- {Opt_nombcache, "nombcache"},
- {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */
- {Opt_removed, "prefetch_block_bitmaps"},
- {Opt_no_prefetch_block_bitmaps, "no_prefetch_block_bitmaps"},
- {Opt_mb_optimize_scan, "mb_optimize_scan=%d"},
- {Opt_removed, "check=none"}, /* mount option from ext2/3 */
- {Opt_removed, "nocheck"}, /* mount option from ext2/3 */
- {Opt_removed, "reservation"}, /* mount option from ext2/3 */
- {Opt_removed, "noreservation"}, /* mount option from ext2/3 */
- {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */
- {Opt_err, NULL},
+static const struct constant_table ext4_param_errors[] = {
+ {"continue", EXT4_MOUNT_ERRORS_CONT},
+ {"panic", EXT4_MOUNT_ERRORS_PANIC},
+ {"remount-ro", EXT4_MOUNT_ERRORS_RO},
+ {}
};
-static ext4_fsblk_t get_sb_block(void **data)
-{
- ext4_fsblk_t sb_block;
- char *options = (char *) *data;
+static const struct constant_table ext4_param_data[] = {
+ {"journal", EXT4_MOUNT_JOURNAL_DATA},
+ {"ordered", EXT4_MOUNT_ORDERED_DATA},
+ {"writeback", EXT4_MOUNT_WRITEBACK_DATA},
+ {}
+};
- if (!options || strncmp(options, "sb=", 3) != 0)
- return 1; /* Default location */
+static const struct constant_table ext4_param_data_err[] = {
+ {"abort", Opt_data_err_abort},
+ {"ignore", Opt_data_err_ignore},
+ {}
+};
- options += 3;
- /* TODO: use simple_strtoll with >32bit ext4 */
- sb_block = simple_strtoul(options, &options, 0);
- if (*options && *options != ',') {
- printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n",
- (char *) *data);
- return 1;
- }
- if (*options == ',')
- options++;
- *data = (void *) options;
+static const struct constant_table ext4_param_jqfmt[] = {
+ {"vfsold", QFMT_VFS_OLD},
+ {"vfsv0", QFMT_VFS_V0},
+ {"vfsv1", QFMT_VFS_V1},
+ {}
+};
- return sb_block;
-}
+static const struct constant_table ext4_param_dax[] = {
+ {"always", Opt_dax_always},
+ {"inode", Opt_dax_inode},
+ {"never", Opt_dax_never},
+ {}
+};
+
+/* String parameter that allows empty argument */
+#define fsparam_string_empty(NAME, OPT) \
+ __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL)
+
+/*
+ * Mount option specification
+ * We don't use fsparam_flag_no because of the way we set the
+ * options and the way we show them in _ext4_show_options(). To
+ * keep the changes to a minimum, let's keep the negative options
+ * separate for now.
+ */
+static const struct fs_parameter_spec ext4_param_specs[] = {
+ fsparam_flag ("bsddf", Opt_bsd_df),
+ fsparam_flag ("minixdf", Opt_minix_df),
+ fsparam_flag ("grpid", Opt_grpid),
+ fsparam_flag ("bsdgroups", Opt_grpid),
+ fsparam_flag ("nogrpid", Opt_nogrpid),
+ fsparam_flag ("sysvgroups", Opt_nogrpid),
+ fsparam_u32 ("resgid", Opt_resgid),
+ fsparam_u32 ("resuid", Opt_resuid),
+ fsparam_u32 ("sb", Opt_sb),
+ fsparam_enum ("errors", Opt_errors, ext4_param_errors),
+ fsparam_flag ("nouid32", Opt_nouid32),
+ fsparam_flag ("debug", Opt_debug),
+ fsparam_flag ("oldalloc", Opt_removed),
+ fsparam_flag ("orlov", Opt_removed),
+ fsparam_flag ("user_xattr", Opt_user_xattr),
+ fsparam_flag ("nouser_xattr", Opt_nouser_xattr),
+ fsparam_flag ("acl", Opt_acl),
+ fsparam_flag ("noacl", Opt_noacl),
+ fsparam_flag ("norecovery", Opt_noload),
+ fsparam_flag ("noload", Opt_noload),
+ fsparam_flag ("bh", Opt_removed),
+ fsparam_flag ("nobh", Opt_removed),
+ fsparam_u32 ("commit", Opt_commit),
+ fsparam_u32 ("min_batch_time", Opt_min_batch_time),
+ fsparam_u32 ("max_batch_time", Opt_max_batch_time),
+ fsparam_u32 ("journal_dev", Opt_journal_dev),
+ fsparam_bdev ("journal_path", Opt_journal_path),
+ fsparam_flag ("journal_checksum", Opt_journal_checksum),
+ fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum),
+ fsparam_flag ("journal_async_commit",Opt_journal_async_commit),
+ fsparam_flag ("abort", Opt_abort),
+ fsparam_enum ("data", Opt_data, ext4_param_data),
+ fsparam_enum ("data_err", Opt_data_err,
+ ext4_param_data_err),
+ fsparam_string_empty
+ ("usrjquota", Opt_usrjquota),
+ fsparam_string_empty
+ ("grpjquota", Opt_grpjquota),
+ fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt),
+ fsparam_flag ("grpquota", Opt_grpquota),
+ fsparam_flag ("quota", Opt_quota),
+ fsparam_flag ("noquota", Opt_noquota),
+ fsparam_flag ("usrquota", Opt_usrquota),
+ fsparam_flag ("prjquota", Opt_prjquota),
+ fsparam_flag ("barrier", Opt_barrier),
+ fsparam_u32 ("barrier", Opt_barrier),
+ fsparam_flag ("nobarrier", Opt_nobarrier),
+ fsparam_flag ("i_version", Opt_i_version),
+ fsparam_flag ("dax", Opt_dax),
+ fsparam_enum ("dax", Opt_dax_type, ext4_param_dax),
+ fsparam_u32 ("stripe", Opt_stripe),
+ fsparam_flag ("delalloc", Opt_delalloc),
+ fsparam_flag ("nodelalloc", Opt_nodelalloc),
+ fsparam_flag ("warn_on_error", Opt_warn_on_error),
+ fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error),
+ fsparam_u32 ("debug_want_extra_isize",
+ Opt_debug_want_extra_isize),
+ fsparam_flag ("mblk_io_submit", Opt_removed),
+ fsparam_flag ("nomblk_io_submit", Opt_removed),
+ fsparam_flag ("block_validity", Opt_block_validity),
+ fsparam_flag ("noblock_validity", Opt_noblock_validity),
+ fsparam_u32 ("inode_readahead_blks",
+ Opt_inode_readahead_blks),
+ fsparam_u32 ("journal_ioprio", Opt_journal_ioprio),
+ fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc),
+ fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc),
+ fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc),
+ fsparam_flag ("dioread_nolock", Opt_dioread_nolock),
+ fsparam_flag ("nodioread_nolock", Opt_dioread_lock),
+ fsparam_flag ("dioread_lock", Opt_dioread_lock),
+ fsparam_flag ("discard", Opt_discard),
+ fsparam_flag ("nodiscard", Opt_nodiscard),
+ fsparam_u32 ("init_itable", Opt_init_itable),
+ fsparam_flag ("init_itable", Opt_init_itable),
+ fsparam_flag ("noinit_itable", Opt_noinit_itable),
+#ifdef CONFIG_EXT4_DEBUG
+ fsparam_flag ("fc_debug_force", Opt_fc_debug_force),
+ fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay),
+#endif
+ fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb),
+ fsparam_flag ("test_dummy_encryption",
+ Opt_test_dummy_encryption),
+ fsparam_string ("test_dummy_encryption",
+ Opt_test_dummy_encryption),
+ fsparam_flag ("inlinecrypt", Opt_inlinecrypt),
+ fsparam_flag ("nombcache", Opt_nombcache),
+ fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */
+ fsparam_flag ("prefetch_block_bitmaps",
+ Opt_removed),
+ fsparam_flag ("no_prefetch_block_bitmaps",
+ Opt_no_prefetch_block_bitmaps),
+ fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan),
+ fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */
+ fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */
+ fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */
+ fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */
+ fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */
+ {}
+};
#define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3))
#define DEFAULT_MB_OPTIMIZE_SCAN (-1)
@@ -1828,90 +1869,22 @@ static const char deprecated_msg[] =
"Mount option \"%s\" will be removed by %s\n"
"Contact linux-ext4@vger.kernel.org if you think we should keep it.\n";
-#ifdef CONFIG_QUOTA
-static int set_qf_name(struct super_block *sb, int qtype, substring_t *args)
-{
- struct ext4_sb_info *sbi = EXT4_SB(sb);
- char *qname, *old_qname = get_qf_name(sb, sbi, qtype);
- int ret = -1;
-
- if (sb_any_quota_loaded(sb) && !old_qname) {
- ext4_msg(sb, KERN_ERR,
- "Cannot change journaled "
- "quota options when quota turned on");
- return -1;
- }
- if (ext4_has_feature_quota(sb)) {
- ext4_msg(sb, KERN_INFO, "Journaled quota options "
- "ignored when QUOTA feature is enabled");
- return 1;
- }
- qname = match_strdup(args);
- if (!qname) {
- ext4_msg(sb, KERN_ERR,
- "Not enough memory for storing quotafile name");
- return -1;
- }
- if (old_qname) {
- if (strcmp(old_qname, qname) == 0)
- ret = 1;
- else
- ext4_msg(sb, KERN_ERR,
- "%s quota file already specified",
- QTYPE2NAME(qtype));
- goto errout;
- }
- if (strchr(qname, '/')) {
- ext4_msg(sb, KERN_ERR,
- "quotafile must be on filesystem root");
- goto errout;
- }
- rcu_assign_pointer(sbi->s_qf_names[qtype], qname);
- set_opt(sb, QUOTA);
- return 1;
-errout:
- kfree(qname);
- return ret;
-}
-
-static int clear_qf_name(struct super_block *sb, int qtype)
-{
-
- struct ext4_sb_info *sbi = EXT4_SB(sb);
- char *old_qname = get_qf_name(sb, sbi, qtype);
-
- if (sb_any_quota_loaded(sb) && old_qname) {
- ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options"
- " when quota turned on");
- return -1;
- }
- rcu_assign_pointer(sbi->s_qf_names[qtype], NULL);
- synchronize_rcu();
- kfree(old_qname);
- return 1;
-}
-#endif
-
#define MOPT_SET 0x0001
#define MOPT_CLEAR 0x0002
#define MOPT_NOSUPPORT 0x0004
#define MOPT_EXPLICIT 0x0008
-#define MOPT_CLEAR_ERR 0x0010
-#define MOPT_GTE0 0x0020
#ifdef CONFIG_QUOTA
#define MOPT_Q 0
-#define MOPT_QFMT 0x0040
+#define MOPT_QFMT 0x0010
#else
#define MOPT_Q MOPT_NOSUPPORT
#define MOPT_QFMT MOPT_NOSUPPORT
#endif
-#define MOPT_DATAJ 0x0080
-#define MOPT_NO_EXT2 0x0100
-#define MOPT_NO_EXT3 0x0200
+#define MOPT_NO_EXT2 0x0020
+#define MOPT_NO_EXT3 0x0040
#define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3)
-#define MOPT_STRING 0x0400
-#define MOPT_SKIP 0x0800
-#define MOPT_2 0x1000
+#define MOPT_SKIP 0x0080
+#define MOPT_2 0x0100
static const struct mount_opts {
int token;
@@ -1944,40 +1917,17 @@ static const struct mount_opts {
EXT4_MOUNT_JOURNAL_CHECKSUM),
MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT},
{Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET},
- {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR},
- {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR},
- {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR},
- {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT,
- MOPT_NO_EXT2},
- {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT,
- MOPT_NO_EXT2},
+ {Opt_data_err, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_NO_EXT2},
{Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET},
{Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR},
{Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET},
{Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR},
{Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR},
- {Opt_commit, 0, MOPT_GTE0},
- {Opt_max_batch_time, 0, MOPT_GTE0},
- {Opt_min_batch_time, 0, MOPT_GTE0},
- {Opt_inode_readahead_blks, 0, MOPT_GTE0},
- {Opt_init_itable, 0, MOPT_GTE0},
- {Opt_dax, EXT4_MOUNT_DAX_ALWAYS, MOPT_SET | MOPT_SKIP},
- {Opt_dax_always, EXT4_MOUNT_DAX_ALWAYS,
- MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP},
- {Opt_dax_inode, EXT4_MOUNT2_DAX_INODE,
- MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP},
- {Opt_dax_never, EXT4_MOUNT2_DAX_NEVER,
- MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP},
- {Opt_stripe, 0, MOPT_GTE0},
- {Opt_resuid, 0, MOPT_GTE0},
- {Opt_resgid, 0, MOPT_GTE0},
- {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0},
- {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING},
- {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0},
- {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ},
- {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ},
- {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA,
- MOPT_NO_EXT2 | MOPT_DATAJ},
+ {Opt_dax_type, 0, MOPT_EXT4_ONLY},
+ {Opt_journal_dev, 0, MOPT_NO_EXT2},
+ {Opt_journal_path, 0, MOPT_NO_EXT2},
+ {Opt_journal_ioprio, 0, MOPT_NO_EXT2},
+ {Opt_data, 0, MOPT_NO_EXT2},
{Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET},
{Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR},
#ifdef CONFIG_EXT4_FS_POSIX_ACL
@@ -1989,7 +1939,6 @@ static const struct mount_opts {
#endif
{Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET},
{Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET},
- {Opt_debug_want_extra_isize, 0, MOPT_GTE0},
{Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q},
{Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA,
MOPT_SET | MOPT_Q},
@@ -2000,23 +1949,15 @@ static const struct mount_opts {
{Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA |
EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA),
MOPT_CLEAR | MOPT_Q},
- {Opt_usrjquota, 0, MOPT_Q | MOPT_STRING},
- {Opt_grpjquota, 0, MOPT_Q | MOPT_STRING},
- {Opt_offusrjquota, 0, MOPT_Q},
- {Opt_offgrpjquota, 0, MOPT_Q},
- {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT},
- {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT},
- {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT},
- {Opt_max_dir_size_kb, 0, MOPT_GTE0},
- {Opt_test_dummy_encryption, 0, MOPT_STRING},
+ {Opt_usrjquota, 0, MOPT_Q},
+ {Opt_grpjquota, 0, MOPT_Q},
+ {Opt_jqfmt, 0, MOPT_QFMT},
{Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET},
{Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS,
MOPT_SET},
- {Opt_mb_optimize_scan, EXT4_MOUNT2_MB_OPTIMIZE_SCAN, MOPT_GTE0},
#ifdef CONFIG_EXT4_DEBUG
{Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT,
MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY},
- {Opt_fc_debug_max_replay, 0, MOPT_GTE0},
#endif
{Opt_err, 0, 0}
};
@@ -2051,448 +1992,951 @@ static int ext4_sb_read_encoding(const struct ext4_super_block *es,
}
#endif
-static int ext4_set_test_dummy_encryption(struct super_block *sb,
- const char *opt,
- const substring_t *arg,
- bool is_remount)
+static int ext4_set_test_dummy_encryption(struct super_block *sb, char *arg)
{
#ifdef CONFIG_FS_ENCRYPTION
struct ext4_sb_info *sbi = EXT4_SB(sb);
int err;
- /*
- * This mount option is just for testing, and it's not worthwhile to
- * implement the extra complexity (e.g. RCU protection) that would be
- * needed to allow it to be set or changed during remount. We do allow
- * it to be specified during remount, but only if there is no change.
- */
- if (is_remount && !sbi->s_dummy_enc_policy.policy) {
- ext4_msg(sb, KERN_WARNING,
- "Can't set test_dummy_encryption on remount");
- return -1;
- }
- err = fscrypt_set_test_dummy_encryption(sb, arg->from,
+ err = fscrypt_set_test_dummy_encryption(sb, arg,
&sbi->s_dummy_enc_policy);
if (err) {
- if (err == -EEXIST)
- ext4_msg(sb, KERN_WARNING,
- "Can't change test_dummy_encryption on remount");
- else if (err == -EINVAL)
- ext4_msg(sb, KERN_WARNING,
- "Value of option \"%s\" is unrecognized", opt);
- else
- ext4_msg(sb, KERN_WARNING,
- "Error processing option \"%s\" [%d]",
- opt, err);
- return -1;
+ ext4_msg(sb, KERN_WARNING,
+ "Error while setting test dummy encryption [%d]", err);
+ return err;
}
ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled");
-#else
- ext4_msg(sb, KERN_WARNING,
- "Test dummy encryption mount option ignored");
#endif
- return 1;
+ return 0;
}
-struct ext4_parsed_options {
- unsigned long journal_devnum;
- unsigned int journal_ioprio;
- int mb_optimize_scan;
+#define EXT4_SPEC_JQUOTA (1 << 0)
+#define EXT4_SPEC_JQFMT (1 << 1)
+#define EXT4_SPEC_DATAJ (1 << 2)
+#define EXT4_SPEC_SB_BLOCK (1 << 3)
+#define EXT4_SPEC_JOURNAL_DEV (1 << 4)
+#define EXT4_SPEC_JOURNAL_IOPRIO (1 << 5)
+#define EXT4_SPEC_DUMMY_ENCRYPTION (1 << 6)
+#define EXT4_SPEC_s_want_extra_isize (1 << 7)
+#define EXT4_SPEC_s_max_batch_time (1 << 8)
+#define EXT4_SPEC_s_min_batch_time (1 << 9)
+#define EXT4_SPEC_s_inode_readahead_blks (1 << 10)
+#define EXT4_SPEC_s_li_wait_mult (1 << 11)
+#define EXT4_SPEC_s_max_dir_size_kb (1 << 12)
+#define EXT4_SPEC_s_stripe (1 << 13)
+#define EXT4_SPEC_s_resuid (1 << 14)
+#define EXT4_SPEC_s_resgid (1 << 15)
+#define EXT4_SPEC_s_commit_interval (1 << 16)
+#define EXT4_SPEC_s_fc_debug_max_replay (1 << 17)
+#define EXT4_SPEC_s_sb_block (1 << 18)
+
+struct ext4_fs_context {
+ char *s_qf_names[EXT4_MAXQUOTAS];
+ char *test_dummy_enc_arg;
+ int s_jquota_fmt; /* Format of quota to use */
+ int mb_optimize_scan;
+#ifdef CONFIG_EXT4_DEBUG
+ int s_fc_debug_max_replay;
+#endif
+ unsigned short qname_spec;
+ unsigned long vals_s_flags; /* Bits to set in s_flags */
+ unsigned long mask_s_flags; /* Bits changed in s_flags */
+ unsigned long journal_devnum;
+ unsigned long s_commit_interval;
+ unsigned long s_stripe;
+ unsigned int s_inode_readahead_blks;
+ unsigned int s_want_extra_isize;
+ unsigned int s_li_wait_mult;
+ unsigned int s_max_dir_size_kb;
+ unsigned int journal_ioprio;
+ unsigned int vals_s_mount_opt;
+ unsigned int mask_s_mount_opt;
+ unsigned int vals_s_mount_opt2;
+ unsigned int mask_s_mount_opt2;
+ unsigned int vals_s_mount_flags;
+ unsigned int mask_s_mount_flags;
+ unsigned int opt_flags; /* MOPT flags */
+ unsigned int spec;
+ u32 s_max_batch_time;
+ u32 s_min_batch_time;
+ kuid_t s_resuid;
+ kgid_t s_resgid;
+ ext4_fsblk_t s_sb_block;
};
-static int handle_mount_opt(struct super_block *sb, char *opt, int token,
- substring_t *args, struct ext4_parsed_options *parsed_opts,
- int is_remount)
+static void ext4_fc_free(struct fs_context *fc)
{
- struct ext4_sb_info *sbi = EXT4_SB(sb);
+ struct ext4_fs_context *ctx = fc->fs_private;
+ int i;
+
+ if (!ctx)
+ return;
+
+ for (i = 0; i < EXT4_MAXQUOTAS; i++)
+ kfree(ctx->s_qf_names[i]);
+
+ kfree(ctx->test_dummy_enc_arg);
+ kfree(ctx);
+}
+
+int ext4_init_fs_context(struct fs_context *fc)
+{
+ struct ext4_fs_context *ctx;
+
+ ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ fc->fs_private = ctx;
+ fc->ops = &ext4_context_ops;
+
+ return 0;
+}
+
+#ifdef CONFIG_QUOTA
+/*
+ * Note the name of the specified quota file.
+ */
+static int note_qf_name(struct fs_context *fc, int qtype,
+ struct fs_parameter *param)
+{
+ struct ext4_fs_context *ctx = fc->fs_private;
+ char *qname;
+
+ if (param->size < 1) {
+ ext4_msg(NULL, KERN_ERR, "Missing quota name");
+ return -EINVAL;
+ }
+ if (strchr(param->string, '/')) {
+ ext4_msg(NULL, KERN_ERR,
+ "quotafile must be on filesystem root");
+ return -EINVAL;
+ }
+ if (ctx->s_qf_names[qtype]) {
+ if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) {
+ ext4_msg(NULL, KERN_ERR,
+ "%s quota file already specified",
+ QTYPE2NAME(qtype));
+ return -EINVAL;
+ }
+ return 0;
+ }
+
+ qname = kmemdup_nul(param->string, param->size, GFP_KERNEL);
+ if (!qname) {
+ ext4_msg(NULL, KERN_ERR,
+ "Not enough memory for storing quotafile name");
+ return -ENOMEM;
+ }
+ ctx->s_qf_names[qtype] = qname;
+ ctx->qname_spec |= 1 << qtype;
+ ctx->spec |= EXT4_SPEC_JQUOTA;
+ return 0;
+}
+
+/*
+ * Clear the name of the specified quota file.
+ */
+static int unnote_qf_name(struct fs_context *fc, int qtype)
+{
+ struct ext4_fs_context *ctx = fc->fs_private;
+
+ if (ctx->s_qf_names[qtype])
+ kfree(ctx->s_qf_names[qtype]);
+
+ ctx->s_qf_names[qtype] = NULL;
+ ctx->qname_spec |= 1 << qtype;
+ ctx->spec |= EXT4_SPEC_JQUOTA;
+ return 0;
+}
+#endif
+
+#define EXT4_SET_CTX(name) \
+static inline void ctx_set_##name(struct ext4_fs_context *ctx, \
+ unsigned long flag) \
+{ \
+ ctx->mask_s_##name |= flag; \
+ ctx->vals_s_##name |= flag; \
+} \
+static inline void ctx_clear_##name(struct ext4_fs_context *ctx, \
+ unsigned long flag) \
+{ \
+ ctx->mask_s_##name |= flag; \
+ ctx->vals_s_##name &= ~flag; \
+} \
+static inline unsigned long \
+ctx_test_##name(struct ext4_fs_context *ctx, unsigned long flag) \
+{ \
+ return (ctx->vals_s_##name & flag); \
+} \
+
+EXT4_SET_CTX(flags);
+EXT4_SET_CTX(mount_opt);
+EXT4_SET_CTX(mount_opt2);
+EXT4_SET_CTX(mount_flags);
+
+static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param)
+{
+ struct ext4_fs_context *ctx = fc->fs_private;
+ struct fs_parse_result result;
const struct mount_opts *m;
+ int is_remount;
kuid_t uid;
kgid_t gid;
- int arg = 0;
+ int token;
-#ifdef CONFIG_QUOTA
- if (token == Opt_usrjquota)
- return set_qf_name(sb, USRQUOTA, &args[0]);
- else if (token == Opt_grpjquota)
- return set_qf_name(sb, GRPQUOTA, &args[0]);
- else if (token == Opt_offusrjquota)
- return clear_qf_name(sb, USRQUOTA);
- else if (token == Opt_offgrpjquota)
- return clear_qf_name(sb, GRPQUOTA);
-#endif
- switch (token) {
- case Opt_noacl:
- case Opt_nouser_xattr:
- ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5");
- break;
- case Opt_sb:
- return 1; /* handled by get_sb_block() */
- case Opt_removed:
- ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt);
- return 1;
- case Opt_abort:
- ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED);
- return 1;
- case Opt_i_version:
- sb->s_flags |= SB_I_VERSION;
- return 1;
- case Opt_lazytime:
- sb->s_flags |= SB_LAZYTIME;
- return 1;
- case Opt_nolazytime:
- sb->s_flags &= ~SB_LAZYTIME;
- return 1;
- case Opt_inlinecrypt:
-#ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
- sb->s_flags |= SB_INLINECRYPT;
-#else
- ext4_msg(sb, KERN_ERR, "inline encryption not supported");
-#endif
- return 1;
- }
+ token = fs_parse(fc, ext4_param_specs, param, &result);
+ if (token < 0)
+ return token;
+ is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE;
for (m = ext4_mount_opts; m->token != Opt_err; m++)
if (token == m->token)
break;
- if (m->token == Opt_err) {
- ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" "
- "or missing value", opt);
- return -1;
- }
+ ctx->opt_flags |= m->flags;
- if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) {
- ext4_msg(sb, KERN_ERR,
- "Mount option \"%s\" incompatible with ext2", opt);
- return -1;
- }
- if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) {
- ext4_msg(sb, KERN_ERR,
- "Mount option \"%s\" incompatible with ext3", opt);
- return -1;
- }
-
- if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg))
- return -1;
- if (args->from && (m->flags & MOPT_GTE0) && (arg < 0))
- return -1;
if (m->flags & MOPT_EXPLICIT) {
if (m->mount_opt & EXT4_MOUNT_DELALLOC) {
- set_opt2(sb, EXPLICIT_DELALLOC);
+ ctx_set_mount_opt2(ctx, EXT4_MOUNT2_EXPLICIT_DELALLOC);
} else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) {
- set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM);
+ ctx_set_mount_opt2(ctx,
+ EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM);
} else
- return -1;
- }
- if (m->flags & MOPT_CLEAR_ERR)
- clear_opt(sb, ERRORS_MASK);
- if (token == Opt_noquota && sb_any_quota_loaded(sb)) {
- ext4_msg(sb, KERN_ERR, "Cannot change quota "
- "options when quota turned on");
- return -1;
+ return -EINVAL;
}
if (m->flags & MOPT_NOSUPPORT) {
- ext4_msg(sb, KERN_ERR, "%s option not supported", opt);
- } else if (token == Opt_commit) {
- if (arg == 0)
- arg = JBD2_DEFAULT_MAX_COMMIT_AGE;
- else if (arg > INT_MAX / HZ) {
- ext4_msg(sb, KERN_ERR,
+ ext4_msg(NULL, KERN_ERR, "%s option not supported",
+ param->key);
+ return 0;
+ }
+
+ switch (token) {
+#ifdef CONFIG_QUOTA
+ case Opt_usrjquota:
+ if (!*param->string)
+ return unnote_qf_name(fc, USRQUOTA);
+ else
+ return note_qf_name(fc, USRQUOTA, param);
+ case Opt_grpjquota:
+ if (!*param->string)
+ return unnote_qf_name(fc, GRPQUOTA);
+ else
+ return note_qf_name(fc, GRPQUOTA, param);
+#endif
+ case Opt_noacl:
+ case Opt_nouser_xattr:
+ ext4_msg(NULL, KERN_WARNING, deprecated_msg, param->key, "3.5");
+ break;
+ case Opt_sb:
+ if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {
+ ext4_msg(NULL, KERN_WARNING,
+ "Ignoring %s option on remount", param->key);
+ } else {
+ ctx->s_sb_block = result.uint_32;
+ ctx->spec |= EXT4_SPEC_s_sb_block;
+ }
+ return 0;
+ case Opt_removed:
+ ext4_msg(NULL, KERN_WARNING, "Ignoring removed %s option",
+ param->key);
+ return 0;
+ case Opt_abort:
+ ctx_set_mount_flags(ctx, EXT4_MF_FS_ABORTED);
+ return 0;
+ case Opt_i_version:
+ ext4_msg(NULL, KERN_WARNING, deprecated_msg, param->key, "5.20");
+ ext4_msg(NULL, KERN_WARNING, "Use iversion instead\n");
+ ctx_set_flags(ctx, SB_I_VERSION);
+ return 0;
+ case Opt_inlinecrypt:
+#ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
+ ctx_set_flags(ctx, SB_INLINECRYPT);
+#else
+ ext4_msg(NULL, KERN_ERR, "inline encryption not supported");
+#endif
+ return 0;
+ case Opt_errors:
+ ctx_clear_mount_opt(ctx, EXT4_MOUNT_ERRORS_MASK);
+ ctx_set_mount_opt(ctx, result.uint_32);
+ return 0;
+#ifdef CONFIG_QUOTA
+ case Opt_jqfmt:
+ ctx->s_jquota_fmt = result.uint_32;
+ ctx->spec |= EXT4_SPEC_JQFMT;
+ return 0;
+#endif
+ case Opt_data:
+ ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS);
+ ctx_set_mount_opt(ctx, result.uint_32);
+ ctx->spec |= EXT4_SPEC_DATAJ;
+ return 0;
+ case Opt_commit:
+ if (result.uint_32 == 0)
+ ctx->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE;
+ else if (result.uint_32 > INT_MAX / HZ) {
+ ext4_msg(NULL, KERN_ERR,
"Invalid commit interval %d, "
"must be smaller than %d",
- arg, INT_MAX / HZ);
- return -1;
+ result.uint_32, INT_MAX / HZ);
+ return -EINVAL;
}
- sbi->s_commit_interval = HZ * arg;
- } else if (token == Opt_debug_want_extra_isize) {
- if ((arg & 1) ||
- (arg < 4) ||
- (arg > (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE))) {
- ext4_msg(sb, KERN_ERR,
- "Invalid want_extra_isize %d", arg);
- return -1;
+ ctx->s_commit_interval = HZ * result.uint_32;
+ ctx->spec |= EXT4_SPEC_s_commit_interval;
+ return 0;
+ case Opt_debug_want_extra_isize:
+ if ((result.uint_32 & 1) || (result.uint_32 < 4)) {
+ ext4_msg(NULL, KERN_ERR,
+ "Invalid want_extra_isize %d", result.uint_32);
+ return -EINVAL;
}
- sbi->s_want_extra_isize = arg;
- } else if (token == Opt_max_batch_time) {
- sbi->s_max_batch_time = arg;
- } else if (token == Opt_min_batch_time) {
- sbi->s_min_batch_time = arg;
- } else if (token == Opt_inode_readahead_blks) {
- if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) {
- ext4_msg(sb, KERN_ERR,
+ ctx->s_want_extra_isize = result.uint_32;
+ ctx->spec |= EXT4_SPEC_s_want_extra_isize;
+ return 0;
+ case Opt_max_batch_time:
+ ctx->s_max_batch_time = result.uint_32;
+ ctx->spec |= EXT4_SPEC_s_max_batch_time;
+ return 0;
+ case Opt_min_batch_time:
+ ctx->s_min_batch_time = result.uint_32;
+ ctx->spec |= EXT4_SPEC_s_min_batch_time;
+ return 0;
+ case Opt_inode_readahead_blks:
+ if (result.uint_32 &&
+ (result.uint_32 > (1 << 30) ||
+ !is_power_of_2(result.uint_32))) {
+ ext4_msg(NULL, KERN_ERR,
"EXT4-fs: inode_readahead_blks must be "
"0 or a power of 2 smaller than 2^31");
- return -1;
+ return -EINVAL;
}
- sbi->s_inode_readahead_blks = arg;
- } else if (token == Opt_init_itable) {
- set_opt(sb, INIT_INODE_TABLE);
- if (!args->from)
- arg = EXT4_DEF_LI_WAIT_MULT;
- sbi->s_li_wait_mult = arg;
- } else if (token == Opt_max_dir_size_kb) {
- sbi->s_max_dir_size_kb = arg;
+ ctx->s_inode_readahead_blks = result.uint_32;
+ ctx->spec |= EXT4_SPEC_s_inode_readahead_blks;
+ return 0;
+ case Opt_init_itable:
+ ctx_set_mount_opt(ctx, EXT4_MOUNT_INIT_INODE_TABLE);
+ ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT;
+ if (param->type == fs_value_is_string)
+ ctx->s_li_wait_mult = result.uint_32;
+ ctx->spec |= EXT4_SPEC_s_li_wait_mult;
+ return 0;
+ case Opt_max_dir_size_kb:
+ ctx->s_max_dir_size_kb = result.uint_32;
+ ctx->spec |= EXT4_SPEC_s_max_dir_size_kb;
+ return 0;
#ifdef CONFIG_EXT4_DEBUG
- } else if (token == Opt_fc_debug_max_replay) {
- sbi->s_fc_debug_max_replay = arg;
+ case Opt_fc_debug_max_replay:
+ ctx->s_fc_debug_max_replay = result.uint_32;
+ ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay;
+ return 0;
#endif
- } else if (token == Opt_stripe) {
- sbi->s_stripe = arg;
- } else if (token == Opt_resuid) {
- uid = make_kuid(current_user_ns(), arg);
+ case Opt_stripe:
+ ctx->s_stripe = result.uint_32;
+ ctx->spec |= EXT4_SPEC_s_stripe;
+ return 0;
+ case Opt_resuid:
+ uid = make_kuid(current_user_ns(), result.uint_32);
if (!uid_valid(uid)) {
- ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg);
- return -1;
+ ext4_msg(NULL, KERN_ERR, "Invalid uid value %d",
+ result.uint_32);
+ return -EINVAL;
}
- sbi->s_resuid = uid;
- } else if (token == Opt_resgid) {
- gid = make_kgid(current_user_ns(), arg);
+ ctx->s_resuid = uid;
+ ctx->spec |= EXT4_SPEC_s_resuid;
+ return 0;
+ case Opt_resgid:
+ gid = make_kgid(current_user_ns(), result.uint_32);
if (!gid_valid(gid)) {
- ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg);
- return -1;
+ ext4_msg(NULL, KERN_ERR, "Invalid gid value %d",
+ result.uint_32);
+ return -EINVAL;
}
- sbi->s_resgid = gid;
- } else if (token == Opt_journal_dev) {
+ ctx->s_resgid = gid;
+ ctx->spec |= EXT4_SPEC_s_resgid;
+ return 0;
+ case Opt_journal_dev:
if (is_remount) {
- ext4_msg(sb, KERN_ERR,
+ ext4_msg(NULL, KERN_ERR,
"Cannot specify journal on remount");
- return -1;
+ return -EINVAL;
}
- parsed_opts->journal_devnum = arg;
- } else if (token == Opt_journal_path) {
- char *journal_path;
+ ctx->journal_devnum = result.uint_32;
+ ctx->spec |= EXT4_SPEC_JOURNAL_DEV;
+ return 0;
+ case Opt_journal_path:
+ {
struct inode *journal_inode;
struct path path;
int error;
if (is_remount) {
- ext4_msg(sb, KERN_ERR,
+ ext4_msg(NULL, KERN_ERR,
"Cannot specify journal on remount");
- return -1;
- }
- journal_path = match_strdup(&args[0]);
- if (!journal_path) {
- ext4_msg(sb, KERN_ERR, "error: could not dup "
- "journal device string");
- return -1;
+ return -EINVAL;
}
- error = kern_path(journal_path, LOOKUP_FOLLOW, &path);
+ error = fs_lookup_param(fc, param, 1, &path);
if (error) {
- ext4_msg(sb, KERN_ERR, "error: could not find "
- "journal device path: error %d", error);
- kfree(journal_path);
- return -1;
+ ext4_msg(NULL, KERN_ERR, "error: could not find "
+ "journal device path");
+ return -EINVAL;
}
journal_inode = d_inode(path.dentry);
- if (!S_ISBLK(journal_inode->i_mode)) {
- ext4_msg(sb, KERN_ERR, "error: journal path %s "
- "is not a block device", journal_path);
- path_put(&path);
- kfree(journal_path);
- return -1;
- }
-
- parsed_opts->journal_devnum = new_encode_dev(journal_inode->i_rdev);
+ ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev);
+ ctx->spec |= EXT4_SPEC_JOURNAL_DEV;
path_put(&path);
- kfree(journal_path);
- } else if (token == Opt_journal_ioprio) {
- if (arg > 7) {
- ext4_msg(sb, KERN_ERR, "Invalid journal IO priority"
+ return 0;
+ }
+ case Opt_journal_ioprio:
+ if (result.uint_32 > 7) {
+ ext4_msg(NULL, KERN_ERR, "Invalid journal IO priority"
" (must be 0-7)");
- return -1;
- }
- parsed_opts->journal_ioprio =
- IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg);
- } else if (token == Opt_test_dummy_encryption) {
- return ext4_set_test_dummy_encryption(sb, opt, &args[0],
- is_remount);
- } else if (m->flags & MOPT_DATAJ) {
- if (is_remount) {
- if (!sbi->s_journal)
- ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option");
- else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) {
- ext4_msg(sb, KERN_ERR,
- "Cannot change data mode on remount");
- return -1;
- }
- } else {
- clear_opt(sb, DATA_FLAGS);
- sbi->s_mount_opt |= m->mount_opt;
+ return -EINVAL;
}
-#ifdef CONFIG_QUOTA
- } else if (m->flags & MOPT_QFMT) {
- if (sb_any_quota_loaded(sb) &&
- sbi->s_jquota_fmt != m->mount_opt) {
- ext4_msg(sb, KERN_ERR, "Cannot change journaled "
- "quota options when quota turned on");
- return -1;
+ ctx->journal_ioprio =
+ IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32);
+ ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO;
+ return 0;
+ case Opt_test_dummy_encryption:
+#ifdef CONFIG_FS_ENCRYPTION
+ if (param->type == fs_value_is_flag) {
+ ctx->spec |= EXT4_SPEC_DUMMY_ENCRYPTION;
+ ctx->test_dummy_enc_arg = NULL;
+ return 0;
}
- if (ext4_has_feature_quota(sb)) {
- ext4_msg(sb, KERN_INFO,
- "Quota format mount options ignored "
- "when QUOTA feature is enabled");
- return 1;
+ if (*param->string &&
+ !(!strcmp(param->string, "v1") ||
+ !strcmp(param->string, "v2"))) {
+ ext4_msg(NULL, KERN_WARNING,
+ "Value of option \"%s\" is unrecognized",
+ param->key);
+ return -EINVAL;
}
- sbi->s_jquota_fmt = m->mount_opt;
+ ctx->spec |= EXT4_SPEC_DUMMY_ENCRYPTION;
+ ctx->test_dummy_enc_arg = kmemdup_nul(param->string, param->size,
+ GFP_KERNEL);
+#else
+ ext4_msg(NULL, KERN_WARNING,
+ "Test dummy encryption mount option ignored");
#endif
- } else if (token == Opt_dax || token == Opt_dax_always ||
- token == Opt_dax_inode || token == Opt_dax_never) {
+ return 0;
+ case Opt_dax:
+ case Opt_dax_type:
#ifdef CONFIG_FS_DAX
- switch (token) {
+ {
+ int type = (token == Opt_dax) ?
+ Opt_dax : result.uint_32;
+
+ switch (type) {
case Opt_dax:
case Opt_dax_always:
- if (is_remount &&
- (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) ||
- (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) {
- fail_dax_change_remount:
- ext4_msg(sb, KERN_ERR, "can't change "
- "dax mount option while remounting");
- return -1;
- }
- if (is_remount &&
- (test_opt(sb, DATA_FLAGS) ==
- EXT4_MOUNT_JOURNAL_DATA)) {
- ext4_msg(sb, KERN_ERR, "can't mount with "
- "both data=journal and dax");
- return -1;
- }
- ext4_msg(sb, KERN_WARNING,
- "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
- sbi->s_mount_opt |= EXT4_MOUNT_DAX_ALWAYS;
- sbi->s_mount_opt2 &= ~EXT4_MOUNT2_DAX_NEVER;
+ ctx_set_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS);
+ ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER);
break;
case Opt_dax_never:
- if (is_remount &&
- (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) ||
- (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS)))
- goto fail_dax_change_remount;
- sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_NEVER;
- sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS;
+ ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER);
+ ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS);
break;
case Opt_dax_inode:
- if (is_remount &&
- ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) ||
- (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) ||
- !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE)))
- goto fail_dax_change_remount;
- sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS;
- sbi->s_mount_opt2 &= ~EXT4_MOUNT2_DAX_NEVER;
+ ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS);
+ ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER);
/* Strictly for printing options */
- sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_INODE;
+ ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE);
break;
}
+ return 0;
+ }
#else
- ext4_msg(sb, KERN_INFO, "dax option not supported");
- sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_NEVER;
- sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS;
- return -1;
+ ext4_msg(NULL, KERN_INFO, "dax option not supported");
+ return -EINVAL;
#endif
- } else if (token == Opt_data_err_abort) {
- sbi->s_mount_opt |= m->mount_opt;
- } else if (token == Opt_data_err_ignore) {
- sbi->s_mount_opt &= ~m->mount_opt;
- } else if (token == Opt_mb_optimize_scan) {
- if (arg != 0 && arg != 1) {
- ext4_msg(sb, KERN_WARNING,
+ case Opt_data_err:
+ if (result.uint_32 == Opt_data_err_abort)
+ ctx_set_mount_opt(ctx, m->mount_opt);
+ else if (result.uint_32 == Opt_data_err_ignore)
+ ctx_clear_mount_opt(ctx, m->mount_opt);
+ return 0;
+ case Opt_mb_optimize_scan:
+ if (result.int_32 != 0 && result.int_32 != 1) {
+ ext4_msg(NULL, KERN_WARNING,
"mb_optimize_scan should be set to 0 or 1.");
- return -1;
+ return -EINVAL;
}
- parsed_opts->mb_optimize_scan = arg;
- } else {
- if (!args->from)
- arg = 1;
+ ctx->mb_optimize_scan = result.int_32;
+ return 0;
+ }
+
+ /*
+ * At this point we should only be getting options requiring MOPT_SET,
+ * or MOPT_CLEAR. Anything else is a bug
+ */
+ if (m->token == Opt_err) {
+ ext4_msg(NULL, KERN_WARNING, "buggy handling of option %s",
+ param->key);
+ WARN_ON(1);
+ return -EINVAL;
+ }
+
+ else {
+ unsigned int set = 0;
+
+ if ((param->type == fs_value_is_flag) ||
+ result.uint_32 > 0)
+ set = 1;
+
if (m->flags & MOPT_CLEAR)
- arg = !arg;
+ set = !set;
else if (unlikely(!(m->flags & MOPT_SET))) {
- ext4_msg(sb, KERN_WARNING,
- "buggy handling of option %s", opt);
+ ext4_msg(NULL, KERN_WARNING,
+ "buggy handling of option %s",
+ param->key);
WARN_ON(1);
- return -1;
+ return -EINVAL;
}
if (m->flags & MOPT_2) {
- if (arg != 0)
- sbi->s_mount_opt2 |= m->mount_opt;
+ if (set != 0)
+ ctx_set_mount_opt2(ctx, m->mount_opt);
else
- sbi->s_mount_opt2 &= ~m->mount_opt;
+ ctx_clear_mount_opt2(ctx, m->mount_opt);
} else {
- if (arg != 0)
- sbi->s_mount_opt |= m->mount_opt;
+ if (set != 0)
+ ctx_set_mount_opt(ctx, m->mount_opt);
else
- sbi->s_mount_opt &= ~m->mount_opt;
+ ctx_clear_mount_opt(ctx, m->mount_opt);
}
}
- return 1;
+
+ return 0;
}
-static int parse_options(char *options, struct super_block *sb,
- struct ext4_parsed_options *ret_opts,
- int is_remount)
+static int parse_options(struct fs_context *fc, char *options)
{
- struct ext4_sb_info __maybe_unused *sbi = EXT4_SB(sb);
- char *p, __maybe_unused *usr_qf_name, __maybe_unused *grp_qf_name;
- substring_t args[MAX_OPT_ARGS];
- int token;
+ struct fs_parameter param;
+ int ret;
+ char *key;
if (!options)
- return 1;
+ return 0;
- while ((p = strsep(&options, ",")) != NULL) {
- if (!*p)
- continue;
- /*
- * Initialize args struct so we know whether arg was
- * found; some options take optional arguments.
- */
- args[0].to = args[0].from = NULL;
- token = match_token(p, tokens, args);
- if (handle_mount_opt(sb, p, token, args, ret_opts,
- is_remount) < 0)
- return 0;
+ while ((key = strsep(&options, ",")) != NULL) {
+ if (*key) {
+ size_t v_len = 0;
+ char *value = strchr(key, '=');
+
+ param.type = fs_value_is_flag;
+ param.string = NULL;
+
+ if (value) {
+ if (value == key)
+ continue;
+
+ *value++ = 0;
+ v_len = strlen(value);
+ param.string = kmemdup_nul(value, v_len,
+ GFP_KERNEL);
+ if (!param.string)
+ return -ENOMEM;
+ param.type = fs_value_is_string;
+ }
+
+ param.key = key;
+ param.size = v_len;
+
+ ret = ext4_parse_param(fc, &param);
+ if (param.string)
+ kfree(param.string);
+ if (ret < 0)
+ return ret;
+ }
+ }
+
+ ret = ext4_validate_options(fc);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int parse_apply_sb_mount_options(struct super_block *sb,
+ struct ext4_fs_context *m_ctx)
+{
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+ char *s_mount_opts = NULL;
+ struct ext4_fs_context *s_ctx = NULL;
+ struct fs_context *fc = NULL;
+ int ret = -ENOMEM;
+
+ if (!sbi->s_es->s_mount_opts[0])
+ return 0;
+
+ s_mount_opts = kstrndup(sbi->s_es->s_mount_opts,
+ sizeof(sbi->s_es->s_mount_opts),
+ GFP_KERNEL);
+ if (!s_mount_opts)
+ return ret;
+
+ fc = kzalloc(sizeof(struct fs_context), GFP_KERNEL);
+ if (!fc)
+ goto out_free;
+
+ s_ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL);
+ if (!s_ctx)
+ goto out_free;
+
+ fc->fs_private = s_ctx;
+ fc->s_fs_info = sbi;
+
+ ret = parse_options(fc, s_mount_opts);
+ if (ret < 0)
+ goto parse_failed;
+
+ ret = ext4_check_opt_consistency(fc, sb);
+ if (ret < 0) {
+parse_failed:
+ ext4_msg(sb, KERN_WARNING,
+ "failed to parse options in superblock: %s",
+ s_mount_opts);
+ ret = 0;
+ goto out_free;
+ }
+
+ if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV)
+ m_ctx->journal_devnum = s_ctx->journal_devnum;
+ if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)
+ m_ctx->journal_ioprio = s_ctx->journal_ioprio;
+
+ ret = ext4_apply_options(fc, sb);
+
+out_free:
+ kfree(s_ctx);
+ kfree(fc);
+ kfree(s_mount_opts);
+ return ret;
+}
+
+static void ext4_apply_quota_options(struct fs_context *fc,
+ struct super_block *sb)
+{
+#ifdef CONFIG_QUOTA
+ bool quota_feature = ext4_has_feature_quota(sb);
+ struct ext4_fs_context *ctx = fc->fs_private;
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+ char *qname;
+ int i;
+
+ if (quota_feature)
+ return;
+
+ if (ctx->spec & EXT4_SPEC_JQUOTA) {
+ for (i = 0; i < EXT4_MAXQUOTAS; i++) {
+ if (!(ctx->qname_spec & (1 << i)))
+ continue;
+
+ qname = ctx->s_qf_names[i]; /* May be NULL */
+ if (qname)
+ set_opt(sb, QUOTA);
+ ctx->s_qf_names[i] = NULL;
+ qname = rcu_replace_pointer(sbi->s_qf_names[i], qname,
+ lockdep_is_held(&sb->s_umount));
+ if (qname)
+ kfree_rcu(qname);
+ }
}
+
+ if (ctx->spec & EXT4_SPEC_JQFMT)
+ sbi->s_jquota_fmt = ctx->s_jquota_fmt;
+#endif
+}
+
+/*
+ * Check quota settings consistency.
+ */
+static int ext4_check_quota_consistency(struct fs_context *fc,
+ struct super_block *sb)
+{
#ifdef CONFIG_QUOTA
+ struct ext4_fs_context *ctx = fc->fs_private;
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+ bool quota_feature = ext4_has_feature_quota(sb);
+ bool quota_loaded = sb_any_quota_loaded(sb);
+ bool usr_qf_name, grp_qf_name, usrquota, grpquota;
+ int quota_flags, i;
+
/*
* We do the test below only for project quotas. 'usrquota' and
* 'grpquota' mount options are allowed even without quota feature
* to support legacy quotas in quota files.
*/
- if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) {
- ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. "
+ if (ctx_test_mount_opt(ctx, EXT4_MOUNT_PRJQUOTA) &&
+ !ext4_has_feature_project(sb)) {
+ ext4_msg(NULL, KERN_ERR, "Project quota feature not enabled. "
"Cannot enable project quota enforcement.");
- return 0;
+ return -EINVAL;
}
- usr_qf_name = get_qf_name(sb, sbi, USRQUOTA);
- grp_qf_name = get_qf_name(sb, sbi, GRPQUOTA);
- if (usr_qf_name || grp_qf_name) {
- if (test_opt(sb, USRQUOTA) && usr_qf_name)
- clear_opt(sb, USRQUOTA);
- if (test_opt(sb, GRPQUOTA) && grp_qf_name)
- clear_opt(sb, GRPQUOTA);
+ quota_flags = EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA |
+ EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA;
+ if (quota_loaded &&
+ ctx->mask_s_mount_opt & quota_flags &&
+ !ctx_test_mount_opt(ctx, quota_flags))
+ goto err_quota_change;
+
+ if (ctx->spec & EXT4_SPEC_JQUOTA) {
- if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) {
- ext4_msg(sb, KERN_ERR, "old and new quota "
- "format mixing");
+ for (i = 0; i < EXT4_MAXQUOTAS; i++) {
+ if (!(ctx->qname_spec & (1 << i)))
+ continue;
+
+ if (quota_loaded &&
+ !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i])
+ goto err_jquota_change;
+
+ if (sbi->s_qf_names[i] && ctx->s_qf_names[i] &&
+ strcmp(get_qf_name(sb, sbi, i),
+ ctx->s_qf_names[i]) != 0)
+ goto err_jquota_specified;
+ }
+
+ if (quota_feature) {
+ ext4_msg(NULL, KERN_INFO,
+ "Journaled quota options ignored when "
+ "QUOTA feature is enabled");
return 0;
}
+ }
- if (!sbi->s_jquota_fmt) {
- ext4_msg(sb, KERN_ERR, "journaled quota format "
- "not specified");
+ if (ctx->spec & EXT4_SPEC_JQFMT) {
+ if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded)
+ goto err_jquota_change;
+ if (quota_feature) {
+ ext4_msg(NULL, KERN_INFO, "Quota format mount options "
+ "ignored when QUOTA feature is enabled");
return 0;
}
}
+
+ /* Make sure we don't mix old and new quota format */
+ usr_qf_name = (get_qf_name(sb, sbi, USRQUOTA) ||
+ ctx->s_qf_names[USRQUOTA]);
+ grp_qf_name = (get_qf_name(sb, sbi, GRPQUOTA) ||
+ ctx->s_qf_names[GRPQUOTA]);
+
+ usrquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) ||
+ test_opt(sb, USRQUOTA));
+
+ grpquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) ||
+ test_opt(sb, GRPQUOTA));
+
+ if (usr_qf_name) {
+ ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA);
+ usrquota = false;
+ }
+ if (grp_qf_name) {
+ ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA);
+ grpquota = false;
+ }
+
+ if (usr_qf_name || grp_qf_name) {
+ if (usrquota || grpquota) {
+ ext4_msg(NULL, KERN_ERR, "old and new quota "
+ "format mixing");
+ return -EINVAL;
+ }
+
+ if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) {
+ ext4_msg(NULL, KERN_ERR, "journaled quota format "
+ "not specified");
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+
+err_quota_change:
+ ext4_msg(NULL, KERN_ERR,
+ "Cannot change quota options when quota turned on");
+ return -EINVAL;
+err_jquota_change:
+ ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota "
+ "options when quota turned on");
+ return -EINVAL;
+err_jquota_specified:
+ ext4_msg(NULL, KERN_ERR, "%s quota file already specified",
+ QTYPE2NAME(i));
+ return -EINVAL;
+#else
+ return 0;
#endif
- if (test_opt(sb, DIOREAD_NOLOCK)) {
+}
+
+static int ext4_check_opt_consistency(struct fs_context *fc,
+ struct super_block *sb)
+{
+ struct ext4_fs_context *ctx = fc->fs_private;
+ struct ext4_sb_info *sbi = fc->s_fs_info;
+ int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE;
+
+ if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) {
+ ext4_msg(NULL, KERN_ERR,
+ "Mount option(s) incompatible with ext2");
+ return -EINVAL;
+ }
+ if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) {
+ ext4_msg(NULL, KERN_ERR,
+ "Mount option(s) incompatible with ext3");
+ return -EINVAL;
+ }
+
+ if (ctx->s_want_extra_isize >
+ (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) {
+ ext4_msg(NULL, KERN_ERR,
+ "Invalid want_extra_isize %d",
+ ctx->s_want_extra_isize);
+ return -EINVAL;
+ }
+
+ if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DIOREAD_NOLOCK)) {
int blocksize =
BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size);
if (blocksize < PAGE_SIZE)
- ext4_msg(sb, KERN_WARNING, "Warning: mounting with an "
+ ext4_msg(NULL, KERN_WARNING, "Warning: mounting with an "
"experimental mount option 'dioread_nolock' "
"for blocksize < PAGE_SIZE");
}
+
+#ifdef CONFIG_FS_ENCRYPTION
+ /*
+ * This mount option is just for testing, and it's not worthwhile to
+ * implement the extra complexity (e.g. RCU protection) that would be
+ * needed to allow it to be set or changed during remount. We do allow
+ * it to be specified during remount, but only if there is no change.
+ */
+ if ((ctx->spec & EXT4_SPEC_DUMMY_ENCRYPTION) &&
+ is_remount && !sbi->s_dummy_enc_policy.policy) {
+ ext4_msg(NULL, KERN_WARNING,
+ "Can't set test_dummy_encryption on remount");
+ return -1;
+ }
+#endif
+
+ if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) {
+ if (!sbi->s_journal) {
+ ext4_msg(NULL, KERN_WARNING,
+ "Remounting file system with no journal "
+ "so ignoring journalled data option");
+ ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS);
+ } else if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS) !=
+ test_opt(sb, DATA_FLAGS)) {
+ ext4_msg(NULL, KERN_ERR, "Cannot change data mode "
+ "on remount");
+ return -EINVAL;
+ }
+ }
+
+ if (is_remount) {
+ if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) &&
+ (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) {
+ ext4_msg(NULL, KERN_ERR, "can't mount with "
+ "both data=journal and dax");
+ return -EINVAL;
+ }
+
+ if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) &&
+ (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) ||
+ (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) {
+fail_dax_change_remount:
+ ext4_msg(NULL, KERN_ERR, "can't change "
+ "dax mount option while remounting");
+ return -EINVAL;
+ } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER) &&
+ (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) ||
+ (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) {
+ goto fail_dax_change_remount;
+ } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE) &&
+ ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) ||
+ (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) ||
+ !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) {
+ goto fail_dax_change_remount;
+ }
+ }
+
+ return ext4_check_quota_consistency(fc, sb);
+}
+
+static int ext4_apply_options(struct fs_context *fc, struct super_block *sb)
+{
+ struct ext4_fs_context *ctx = fc->fs_private;
+ struct ext4_sb_info *sbi = fc->s_fs_info;
+ int ret = 0;
+
+ sbi->s_mount_opt &= ~ctx->mask_s_mount_opt;
+ sbi->s_mount_opt |= ctx->vals_s_mount_opt;
+ sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2;
+ sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2;
+ sbi->s_mount_flags &= ~ctx->mask_s_mount_flags;
+ sbi->s_mount_flags |= ctx->vals_s_mount_flags;
+ sb->s_flags &= ~ctx->mask_s_flags;
+ sb->s_flags |= ctx->vals_s_flags;
+
+ /*
+ * i_version differs from common mount option iversion so we have
+ * to let vfs know that it was set, otherwise it would get cleared
+ * on remount
+ */
+ if (ctx->mask_s_flags & SB_I_VERSION)
+ fc->sb_flags |= SB_I_VERSION;
+
+#define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; })
+ APPLY(s_commit_interval);
+ APPLY(s_stripe);
+ APPLY(s_max_batch_time);
+ APPLY(s_min_batch_time);
+ APPLY(s_want_extra_isize);
+ APPLY(s_inode_readahead_blks);
+ APPLY(s_max_dir_size_kb);
+ APPLY(s_li_wait_mult);
+ APPLY(s_resgid);
+ APPLY(s_resuid);
+
+#ifdef CONFIG_EXT4_DEBUG
+ APPLY(s_fc_debug_max_replay);
+#endif
+
+ ext4_apply_quota_options(fc, sb);
+
+ if (ctx->spec & EXT4_SPEC_DUMMY_ENCRYPTION)
+ ret = ext4_set_test_dummy_encryption(sb, ctx->test_dummy_enc_arg);
+
+ return ret;
+}
+
+
+static int ext4_validate_options(struct fs_context *fc)
+{
+#ifdef CONFIG_QUOTA
+ struct ext4_fs_context *ctx = fc->fs_private;
+ char *usr_qf_name, *grp_qf_name;
+
+ usr_qf_name = ctx->s_qf_names[USRQUOTA];
+ grp_qf_name = ctx->s_qf_names[GRPQUOTA];
+
+ if (usr_qf_name || grp_qf_name) {
+ if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) && usr_qf_name)
+ ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA);
+
+ if (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) && grp_qf_name)
+ ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA);
+
+ if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) ||
+ ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA)) {
+ ext4_msg(NULL, KERN_ERR, "old and new quota "
+ "format mixing");
+ return -EINVAL;
+ }
+ }
+#endif
return 1;
}
@@ -2533,12 +2977,12 @@ static inline void ext4_show_quota_options(struct seq_file *seq,
static const char *token2str(int token)
{
- const struct match_token *t;
+ const struct fs_parameter_spec *spec;
- for (t = tokens; t->token != Opt_err; t++)
- if (t->token == token && !strchr(t->pattern, '='))
+ for (spec = ext4_param_specs; spec->name != NULL; spec++)
+ if (spec->opt == token && !spec->type)
break;
- return t->pattern;
+ return spec->name;
}
/*
@@ -2564,7 +3008,7 @@ static int _ext4_show_options(struct seq_file *seq, struct super_block *sb,
for (m = ext4_mount_opts; m->token != Opt_err; m++) {
int want_set = m->flags & MOPT_SET;
if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) ||
- (m->flags & MOPT_CLEAR_ERR) || m->flags & MOPT_SKIP)
+ m->flags & MOPT_SKIP)
continue;
if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt)))
continue; /* skip if same as the default */
@@ -3876,21 +4320,52 @@ static void ext4_setup_csum_trigger(struct super_block *sb,
sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger;
}
-static int ext4_fill_super(struct super_block *sb, void *data, int silent)
+static void ext4_free_sbi(struct ext4_sb_info *sbi)
+{
+ if (!sbi)
+ return;
+
+ kfree(sbi->s_blockgroup_lock);
+ fs_put_dax(sbi->s_daxdev);
+ kfree(sbi);
+}
+
+static struct ext4_sb_info *ext4_alloc_sbi(struct super_block *sb)
+{
+ struct ext4_sb_info *sbi;
+
+ sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
+ if (!sbi)
+ return NULL;
+
+ sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev);
+
+ sbi->s_blockgroup_lock =
+ kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
+
+ if (!sbi->s_blockgroup_lock)
+ goto err_out;
+
+ sb->s_fs_info = sbi;
+ sbi->s_sb = sb;
+ return sbi;
+err_out:
+ fs_put_dax(sbi->s_daxdev);
+ kfree(sbi);
+ return NULL;
+}
+
+static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
{
- struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev);
- char *orig_data = kstrdup(data, GFP_KERNEL);
struct buffer_head *bh, **group_desc;
struct ext4_super_block *es = NULL;
- struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
struct flex_groups **flex_groups;
ext4_fsblk_t block;
- ext4_fsblk_t sb_block = get_sb_block(&data);
ext4_fsblk_t logical_sb_block;
unsigned long offset = 0;
unsigned long def_mount_opts;
struct inode *root;
- const char *descr;
int ret = -ENOMEM;
int blocksize, clustersize;
unsigned int db_count;
@@ -3899,32 +4374,17 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
__u64 blocks_count;
int err = 0;
ext4_group_t first_not_zeroed;
- struct ext4_parsed_options parsed_opts;
+ struct ext4_fs_context *ctx = fc->fs_private;
+ int silent = fc->sb_flags & SB_SILENT;
/* Set defaults for the variables that will be set during parsing */
- parsed_opts.journal_ioprio = DEFAULT_JOURNAL_IOPRIO;
- parsed_opts.journal_devnum = 0;
- parsed_opts.mb_optimize_scan = DEFAULT_MB_OPTIMIZE_SCAN;
-
- if ((data && !orig_data) || !sbi)
- goto out_free_base;
+ ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO;
+ ctx->mb_optimize_scan = DEFAULT_MB_OPTIMIZE_SCAN;
- sbi->s_daxdev = dax_dev;
- sbi->s_blockgroup_lock =
- kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
- if (!sbi->s_blockgroup_lock)
- goto out_free_base;
-
- sb->s_fs_info = sbi;
- sbi->s_sb = sb;
sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS;
- sbi->s_sb_block = sb_block;
sbi->s_sectors_written_start =
part_stat_read(sb->s_bdev, sectors[STAT_WRITE]);
- /* Cleanup superblock name */
- strreplace(sb->s_id, '/', '!');
-
/* -EINVAL is default */
ret = -EINVAL;
blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE);
@@ -3938,10 +4398,10 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
* block sizes. We need to calculate the offset from buffer start.
*/
if (blocksize != EXT4_MIN_BLOCK_SIZE) {
- logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE;
+ logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE;
offset = do_div(logical_sb_block, blocksize);
} else {
- logical_sb_block = sb_block;
+ logical_sb_block = sbi->s_sb_block;
}
bh = ext4_sb_bread_unmovable(sb, logical_sb_block);
@@ -4146,21 +4606,18 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
}
}
- if (sbi->s_es->s_mount_opts[0]) {
- char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts,
- sizeof(sbi->s_es->s_mount_opts),
- GFP_KERNEL);
- if (!s_mount_opts)
- goto failed_mount;
- if (!parse_options(s_mount_opts, sb, &parsed_opts, 0)) {
- ext4_msg(sb, KERN_WARNING,
- "failed to parse options in superblock: %s",
- s_mount_opts);
- }
- kfree(s_mount_opts);
- }
+ err = parse_apply_sb_mount_options(sb, ctx);
+ if (err < 0)
+ goto failed_mount;
+
sbi->s_def_mount_opt = sbi->s_mount_opt;
- if (!parse_options((char *) data, sb, &parsed_opts, 0))
+
+ err = ext4_check_opt_consistency(fc, sb);
+ if (err < 0)
+ goto failed_mount;
+
+ err = ext4_apply_options(fc, sb);
+ if (err < 0)
goto failed_mount;
#ifdef CONFIG_UNICODE
@@ -4299,7 +4756,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
goto failed_mount;
}
- if (dax_supported(dax_dev, sb->s_bdev, blocksize, 0,
+ if (dax_supported(sbi->s_daxdev, sb->s_bdev, blocksize, 0,
bdev_nr_sectors(sb->s_bdev)))
set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags);
@@ -4337,7 +4794,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
goto failed_mount;
}
- logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE;
+ logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE;
offset = do_div(logical_sb_block, blocksize);
bh = ext4_sb_bread_unmovable(sb, logical_sb_block);
if (IS_ERR(bh)) {
@@ -4620,7 +5077,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
/* Initialize fast commit stuff */
atomic_set(&sbi->s_fc_subtid, 0);
- atomic_set(&sbi->s_fc_ineligible_updates, 0);
INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]);
INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]);
INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]);
@@ -4653,7 +5109,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
* root first: it may be modified in the journal!
*/
if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) {
- err = ext4_load_journal(sb, es, parsed_opts.journal_devnum);
+ err = ext4_load_journal(sb, es, ctx->journal_devnum);
if (err)
goto failed_mount3a;
} else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) &&
@@ -4753,7 +5209,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
goto failed_mount_wq;
}
- set_task_ioprio(sbi->s_journal->j_task, parsed_opts.journal_ioprio);
+ set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio);
sbi->s_journal->j_submit_inode_data_buffers =
ext4_journal_submit_inode_data_buffers;
@@ -4865,9 +5321,9 @@ no_journal:
* turned off by passing "mb_optimize_scan=0". This can also be
* turned on forcefully by passing "mb_optimize_scan=1".
*/
- if (parsed_opts.mb_optimize_scan == 1)
+ if (ctx->mb_optimize_scan == 1)
set_opt2(sb, MB_OPTIMIZE_SCAN);
- else if (parsed_opts.mb_optimize_scan == 0)
+ else if (ctx->mb_optimize_scan == 0)
clear_opt2(sb, MB_OPTIMIZE_SCAN);
else if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD)
set_opt2(sb, MB_OPTIMIZE_SCAN);
@@ -4969,15 +5425,6 @@ no_journal:
if (err)
goto failed_mount9;
}
- if (EXT4_SB(sb)->s_journal) {
- if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)
- descr = " journalled data mode";
- else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA)
- descr = " ordered data mode";
- else
- descr = " writeback data mode";
- } else
- descr = "out journal";
if (test_opt(sb, DISCARD)) {
struct request_queue *q = bdev_get_queue(sb->s_bdev);
@@ -4987,14 +5434,6 @@ no_journal:
"the device does not support discard");
}
- if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount"))
- ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. "
- "Opts: %.*s%s%s. Quota mode: %s.", descr,
- (int) sizeof(sbi->s_es->s_mount_opts),
- sbi->s_es->s_mount_opts,
- *sbi->s_es->s_mount_opts ? "; " : "", orig_data,
- ext4_quota_mode(sb));
-
if (es->s_error_count)
mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */
@@ -5005,7 +5444,6 @@ no_journal:
atomic_set(&sbi->s_warning_count, 0);
atomic_set(&sbi->s_msg_count, 0);
- kfree(orig_data);
return 0;
cantfind_ext4:
@@ -5091,14 +5529,60 @@ failed_mount:
ext4_blkdev_remove(sbi);
out_fail:
sb->s_fs_info = NULL;
- kfree(sbi->s_blockgroup_lock);
-out_free_base:
- kfree(sbi);
- kfree(orig_data);
- fs_put_dax(dax_dev);
return err ? err : ret;
}
+static int ext4_fill_super(struct super_block *sb, struct fs_context *fc)
+{
+ struct ext4_fs_context *ctx = fc->fs_private;
+ struct ext4_sb_info *sbi;
+ const char *descr;
+ int ret;
+
+ sbi = ext4_alloc_sbi(sb);
+ if (!sbi)
+ ret = -ENOMEM;
+
+ fc->s_fs_info = sbi;
+
+ /* Cleanup superblock name */
+ strreplace(sb->s_id, '/', '!');
+
+ sbi->s_sb_block = 1; /* Default super block location */
+ if (ctx->spec & EXT4_SPEC_s_sb_block)
+ sbi->s_sb_block = ctx->s_sb_block;
+
+ ret = __ext4_fill_super(fc, sb);
+ if (ret < 0)
+ goto free_sbi;
+
+ if (sbi->s_journal) {
+ if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)
+ descr = " journalled data mode";
+ else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA)
+ descr = " ordered data mode";
+ else
+ descr = " writeback data mode";
+ } else
+ descr = "out journal";
+
+ if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount"))
+ ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. "
+ "Quota mode: %s.", descr, ext4_quota_mode(sb));
+
+ return 0;
+
+free_sbi:
+ ext4_free_sbi(sbi);
+ fc->s_fs_info = NULL;
+ return ret;
+}
+
+static int ext4_get_tree(struct fs_context *fc)
+{
+ return get_tree_bdev(fc, ext4_fill_super);
+}
+
/*
* Setup any per-fs journal parameters now. We'll do this both on
* initial mount, once the journal has been initialised but before we've
@@ -5727,11 +6211,12 @@ struct ext4_mount_options {
#endif
};
-static int ext4_remount(struct super_block *sb, int *flags, char *data)
+static int __ext4_remount(struct fs_context *fc, struct super_block *sb)
{
+ struct ext4_fs_context *ctx = fc->fs_private;
struct ext4_super_block *es;
struct ext4_sb_info *sbi = EXT4_SB(sb);
- unsigned long old_sb_flags, vfs_flags;
+ unsigned long old_sb_flags;
struct ext4_mount_options old_opts;
ext4_group_t g;
int err = 0;
@@ -5740,14 +6225,8 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
int i, j;
char *to_free[EXT4_MAXQUOTAS];
#endif
- char *orig_data = kstrdup(data, GFP_KERNEL);
- struct ext4_parsed_options parsed_opts;
- parsed_opts.journal_ioprio = DEFAULT_JOURNAL_IOPRIO;
- parsed_opts.journal_devnum = 0;
-
- if (data && !orig_data)
- return -ENOMEM;
+ ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO;
/* Store the original options */
old_sb_flags = sb->s_flags;
@@ -5768,28 +6247,16 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
if (!old_opts.s_qf_names[i]) {
for (j = 0; j < i; j++)
kfree(old_opts.s_qf_names[j]);
- kfree(orig_data);
return -ENOMEM;
}
} else
old_opts.s_qf_names[i] = NULL;
#endif
if (sbi->s_journal && sbi->s_journal->j_task->io_context)
- parsed_opts.journal_ioprio =
+ ctx->journal_ioprio =
sbi->s_journal->j_task->io_context->ioprio;
- /*
- * Some options can be enabled by ext4 and/or by VFS mount flag
- * either way we need to make sure it matches in both *flags and
- * s_flags. Copy those selected flags from *flags to s_flags
- */
- vfs_flags = SB_LAZYTIME | SB_I_VERSION;
- sb->s_flags = (sb->s_flags & ~vfs_flags) | (*flags & vfs_flags);
-
- if (!parse_options(data, sb, &parsed_opts, 1)) {
- err = -EINVAL;
- goto restore_opts;
- }
+ ext4_apply_options(fc, sb);
if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^
test_opt(sb, JOURNAL_CHECKSUM)) {
@@ -5836,19 +6303,19 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
if (sbi->s_journal) {
ext4_init_journal_params(sb, sbi->s_journal);
- set_task_ioprio(sbi->s_journal->j_task, parsed_opts.journal_ioprio);
+ set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio);
}
/* Flush outstanding errors before changing fs state */
flush_work(&sbi->s_error_work);
- if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) {
+ if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) {
if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) {
err = -EROFS;
goto restore_opts;
}
- if (*flags & SB_RDONLY) {
+ if (fc->sb_flags & SB_RDONLY) {
err = sync_filesystem(sb);
if (err < 0)
goto restore_opts;
@@ -5996,16 +6463,6 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb))
ext4_stop_mmpd(sbi);
- /*
- * Some options can be enabled by ext4 and/or by VFS mount flag
- * either way we need to make sure it matches in both *flags and
- * s_flags. Copy those selected flags from s_flags to *flags
- */
- *flags = (*flags & ~vfs_flags) | (sb->s_flags & vfs_flags);
-
- ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s. Quota mode: %s.",
- orig_data, ext4_quota_mode(sb));
- kfree(orig_data);
return 0;
restore_opts:
@@ -6031,10 +6488,30 @@ restore_opts:
#endif
if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb))
ext4_stop_mmpd(sbi);
- kfree(orig_data);
return err;
}
+static int ext4_reconfigure(struct fs_context *fc)
+{
+ struct super_block *sb = fc->root->d_sb;
+ int ret;
+
+ fc->s_fs_info = EXT4_SB(sb);
+
+ ret = ext4_check_opt_consistency(fc, sb);
+ if (ret < 0)
+ return ret;
+
+ ret = __ext4_remount(fc, sb);
+ if (ret < 0)
+ return ret;
+
+ ext4_msg(sb, KERN_INFO, "re-mounted. Quota mode: %s.",
+ ext4_quota_mode(sb));
+
+ return 0;
+}
+
#ifdef CONFIG_QUOTA
static int ext4_statfs_project(struct super_block *sb,
kprojid_t projid, struct kstatfs *buf)
@@ -6275,10 +6752,7 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id,
lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA);
err = dquot_quota_on(sb, type, format_id, path);
- if (err) {
- lockdep_set_quota_inode(path->dentry->d_inode,
- I_DATA_SEM_NORMAL);
- } else {
+ if (!err) {
struct inode *inode = d_inode(path->dentry);
handle_t *handle;
@@ -6298,7 +6772,12 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id,
ext4_journal_stop(handle);
unlock_inode:
inode_unlock(inode);
+ if (err)
+ dquot_quota_off(sb, type);
}
+ if (err)
+ lockdep_set_quota_inode(path->dentry->d_inode,
+ I_DATA_SEM_NORMAL);
return err;
}
@@ -6361,8 +6840,19 @@ int ext4_enable_quotas(struct super_block *sb)
"Failed to enable quota tracking "
"(type=%d, err=%d). Please run "
"e2fsck to fix.", type, err);
- for (type--; type >= 0; type--)
+ for (type--; type >= 0; type--) {
+ struct inode *inode;
+
+ inode = sb_dqopt(sb)->files[type];
+ if (inode)
+ inode = igrab(inode);
dquot_quota_off(sb, type);
+ if (inode) {
+ lockdep_set_quota_inode(inode,
+ I_DATA_SEM_NORMAL);
+ iput(inode);
+ }
+ }
return err;
}
@@ -6466,7 +6956,7 @@ static ssize_t ext4_quota_write(struct super_block *sb, int type,
struct buffer_head *bh;
handle_t *handle = journal_current_handle();
- if (EXT4_SB(sb)->s_journal && !handle) {
+ if (!handle) {
ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)"
" cancelled because transaction is not started",
(unsigned long long)off, (unsigned long long)len);
@@ -6517,12 +7007,6 @@ out:
}
#endif
-static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data)
-{
- return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super);
-}
-
#if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2)
static inline void register_as_ext2(void)
{
@@ -6580,11 +7064,12 @@ static inline int ext3_feature_set_ok(struct super_block *sb)
}
static struct file_system_type ext4_fs_type = {
- .owner = THIS_MODULE,
- .name = "ext4",
- .mount = ext4_mount,
- .kill_sb = kill_block_super,
- .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
+ .owner = THIS_MODULE,
+ .name = "ext4",
+ .init_fs_context = ext4_init_fs_context,
+ .parameters = ext4_param_specs,
+ .kill_sb = kill_block_super,
+ .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
};
MODULE_ALIAS_FS("ext4");
@@ -6649,6 +7134,7 @@ static int __init ext4_init_fs(void)
out:
unregister_as_ext2();
unregister_as_ext3();
+ ext4_fc_destroy_dentry_cache();
out05:
destroy_inodecache();
out1:
@@ -6675,6 +7161,7 @@ static void __exit ext4_exit_fs(void)
unregister_as_ext2();
unregister_as_ext3();
unregister_filesystem(&ext4_fs_type);
+ ext4_fc_destroy_dentry_cache();
destroy_inodecache();
ext4_exit_mballoc();
ext4_exit_sysfs();
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.