#include "xfs_reflink.h"
#include <linux/magic.h>
-#include <linux/parser.h>
+#include <linux/fs_context.h>
+#include <linux/fs_parser.h>
static const struct super_operations xfs_super_operations;
Opt_filestreams, Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota,
Opt_prjquota, Opt_uquota, Opt_gquota, Opt_pquota,
Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce,
- Opt_discard, Opt_nodiscard, Opt_dax, Opt_err,
+ Opt_discard, Opt_nodiscard, Opt_dax,
};
-static const match_table_t tokens = {
- {Opt_logbufs, "logbufs=%u"}, /* number of XFS log buffers */
- {Opt_logbsize, "logbsize=%s"}, /* size of XFS log buffers */
- {Opt_logdev, "logdev=%s"}, /* log device */
- {Opt_rtdev, "rtdev=%s"}, /* realtime I/O device */
- {Opt_wsync, "wsync"}, /* safe-mode nfs compatible mount */
- {Opt_noalign, "noalign"}, /* turn off stripe alignment */
- {Opt_swalloc, "swalloc"}, /* turn on stripe width allocation */
- {Opt_sunit, "sunit=%u"}, /* data volume stripe unit */
- {Opt_swidth, "swidth=%u"}, /* data volume stripe width */
- {Opt_nouuid, "nouuid"}, /* ignore filesystem UUID */
- {Opt_grpid, "grpid"}, /* group-ID from parent directory */
- {Opt_nogrpid, "nogrpid"}, /* group-ID from current process */
- {Opt_bsdgroups, "bsdgroups"}, /* group-ID from parent directory */
- {Opt_sysvgroups,"sysvgroups"}, /* group-ID from current process */
- {Opt_allocsize, "allocsize=%s"},/* preferred allocation size */
- {Opt_norecovery,"norecovery"}, /* don't run XFS recovery */
- {Opt_inode64, "inode64"}, /* inodes can be allocated anywhere */
- {Opt_inode32, "inode32"}, /* inode allocation limited to
- * XFS_MAXINUMBER_32 */
- {Opt_ikeep, "ikeep"}, /* do not free empty inode clusters */
- {Opt_noikeep, "noikeep"}, /* free empty inode clusters */
- {Opt_largeio, "largeio"}, /* report large I/O sizes in stat() */
- {Opt_nolargeio, "nolargeio"}, /* do not report large I/O sizes
- * in stat(). */
- {Opt_attr2, "attr2"}, /* do use attr2 attribute format */
- {Opt_noattr2, "noattr2"}, /* do not use attr2 attribute format */
- {Opt_filestreams,"filestreams"},/* use filestreams allocator */
- {Opt_quota, "quota"}, /* disk quotas (user) */
- {Opt_noquota, "noquota"}, /* no quotas */
- {Opt_usrquota, "usrquota"}, /* user quota enabled */
- {Opt_grpquota, "grpquota"}, /* group quota enabled */
- {Opt_prjquota, "prjquota"}, /* project quota enabled */
- {Opt_uquota, "uquota"}, /* user quota (IRIX variant) */
- {Opt_gquota, "gquota"}, /* group quota (IRIX variant) */
- {Opt_pquota, "pquota"}, /* project quota (IRIX variant) */
- {Opt_uqnoenforce,"uqnoenforce"},/* user quota limit enforcement */
- {Opt_gqnoenforce,"gqnoenforce"},/* group quota limit enforcement */
- {Opt_pqnoenforce,"pqnoenforce"},/* project quota limit enforcement */
- {Opt_qnoenforce, "qnoenforce"}, /* same as uqnoenforce */
- {Opt_discard, "discard"}, /* Discard unused blocks */
- {Opt_nodiscard, "nodiscard"}, /* Do not discard unused blocks */
- {Opt_dax, "dax"}, /* Enable direct access to bdev pages */
- {Opt_err, NULL},
+static const struct fs_parameter_spec xfs_param_specs[] = {
+ fsparam_u32("logbufs", Opt_logbufs),
+ fsparam_string("logbsize", Opt_logbsize),
+ fsparam_string("logdev", Opt_logdev),
+ fsparam_string("rtdev", Opt_rtdev),
+ fsparam_flag("wsync", Opt_wsync),
+ fsparam_flag("noalign", Opt_noalign),
+ fsparam_flag("swalloc", Opt_swalloc),
+ fsparam_u32("sunit", Opt_sunit),
+ fsparam_u32("swidth", Opt_swidth),
+ fsparam_flag("nouuid", Opt_nouuid),
+ fsparam_flag("grpid", Opt_grpid),
+ fsparam_flag("nogrpid", Opt_nogrpid),
+ fsparam_flag("bsdgroups", Opt_bsdgroups),
+ fsparam_flag("sysvgroups", Opt_sysvgroups),
+ fsparam_string("allocsize", Opt_allocsize),
+ fsparam_flag("norecovery", Opt_norecovery),
+ fsparam_flag("inode64", Opt_inode64),
+ fsparam_flag("inode32", Opt_inode32),
+ fsparam_flag("ikeep", Opt_ikeep),
+ fsparam_flag("noikeep", Opt_noikeep),
+ fsparam_flag("largeio", Opt_largeio),
+ fsparam_flag("nolargeio", Opt_nolargeio),
+ fsparam_flag("attr2", Opt_attr2),
+ fsparam_flag("noattr2", Opt_noattr2),
+ fsparam_flag("filestreams", Opt_filestreams),
+ fsparam_flag("quota", Opt_quota),
+ fsparam_flag("noquota", Opt_noquota),
+ fsparam_flag("usrquota", Opt_usrquota),
+ fsparam_flag("grpquota", Opt_grpquota),
+ fsparam_flag("prjquota", Opt_prjquota),
+ fsparam_flag("uquota", Opt_uquota),
+ fsparam_flag("gquota", Opt_gquota),
+ fsparam_flag("pquota", Opt_pquota),
+ fsparam_flag("uqnoenforce", Opt_uqnoenforce),
+ fsparam_flag("gqnoenforce", Opt_gqnoenforce),
+ fsparam_flag("pqnoenforce", Opt_pqnoenforce),
+ fsparam_flag("qnoenforce", Opt_qnoenforce),
+ fsparam_flag("discard", Opt_discard),
+ fsparam_flag("nodiscard", Opt_nodiscard),
+ fsparam_flag("dax", Opt_dax),
+ {}
};
+static const struct fs_parameter_description xfs_fs_parameters = {
+ .name = "xfs",
+ .specs = xfs_param_specs,
+};
static int
suffix_kstrtoint(
return ret;
}
-static int
-match_kstrtoint(
- const substring_t *s,
- unsigned int base,
- int *res)
-{
- const char *value;
- int ret;
-
- value = match_strdup(s);
- if (!value)
- return -ENOMEM;
- ret = suffix_kstrtoint(value, base, res);
- kfree(value);
- return ret;
-}
-
+/*
+ * Set mount state from a mount option.
+ *
+ * NOTE: mp->m_super is NULL here!
+ */
static int
xfs_fc_parse_param(
- int token,
- char *p,
- substring_t *args,
- struct xfs_mount *mp)
+ struct fs_context *fc,
+ struct fs_parameter *param)
{
+ struct xfs_mount *mp = fc->s_fs_info;
+ struct fs_parse_result result;
int size = 0;
+ int opt;
- switch (token) {
+ opt = fs_parse(fc, &xfs_fs_parameters, param, &result);
+ if (opt < 0)
+ return opt;
+
+ switch (opt) {
case Opt_logbufs:
- if (match_int(args, &mp->m_logbufs))
- return -EINVAL;
+ mp->m_logbufs = result.uint_32;
return 0;
case Opt_logbsize:
- if (match_kstrtoint(args, 10, &mp->m_logbsize))
+ if (suffix_kstrtoint(param->string, 10, &mp->m_logbsize))
return -EINVAL;
return 0;
case Opt_logdev:
kfree(mp->m_logname);
- mp->m_logname = match_strdup(args);
+ mp->m_logname = kstrdup(param->string, GFP_KERNEL);
if (!mp->m_logname)
return -ENOMEM;
return 0;
case Opt_rtdev:
kfree(mp->m_rtname);
- mp->m_rtname = match_strdup(args);
+ mp->m_rtname = kstrdup(param->string, GFP_KERNEL);
if (!mp->m_rtname)
return -ENOMEM;
return 0;
case Opt_allocsize:
- if (match_kstrtoint(args, 10, &size))
+ if (suffix_kstrtoint(param->string, 10, &size))
return -EINVAL;
mp->m_allocsize_log = ffs(size) - 1;
mp->m_flags |= XFS_MOUNT_ALLOCSIZE;
mp->m_flags |= XFS_MOUNT_SWALLOC;
return 0;
case Opt_sunit:
- if (match_int(args, &mp->m_dalign))
- return -EINVAL;
+ mp->m_dalign = result.uint_32;
return 0;
case Opt_swidth:
- if (match_int(args, &mp->m_swidth))
- return -EINVAL;
+ mp->m_swidth = result.uint_32;
return 0;
case Opt_inode32:
mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
return 0;
#endif
default:
- xfs_warn(mp, "unknown mount option [%s].", p);
+ xfs_warn(mp, "unknown mount option [%s].", param->key);
return -EINVAL;
}
return 0;
}
-/*
- * This function fills in xfs_mount_t fields based on mount args.
- * Note: the superblock has _not_ yet been read in.
- *
- * Note that this function leaks the various device name allocations on
- * failure. The caller takes care of them.
- *
- * *sb is const because this is also used to test options on the remount
- * path, and we don't want this to have any side effects at remount time.
- * Today this function does not change *sb, but just to future-proof...
- */
-static int
-xfs_parseargs(
- struct xfs_mount *mp,
- char *options)
-{
- const struct super_block *sb = mp->m_super;
- char *p;
- substring_t args[MAX_OPT_ARGS];
-
- /*
- * Copy binary VFS mount flags we are interested in.
- */
- if (sb_rdonly(sb))
- mp->m_flags |= XFS_MOUNT_RDONLY;
- if (sb->s_flags & SB_DIRSYNC)
- mp->m_flags |= XFS_MOUNT_DIRSYNC;
- if (sb->s_flags & SB_SYNCHRONOUS)
- mp->m_flags |= XFS_MOUNT_WSYNC;
-
- /*
- * These can be overridden by the mount option parsing.
- */
- mp->m_logbufs = -1;
- mp->m_logbsize = -1;
- mp->m_allocsize_log = 16; /* 64k */
-
- if (!options)
- return 0;
-
- while ((p = strsep(&options, ",")) != NULL) {
- int token;
- int ret;
-
- if (!*p)
- continue;
-
- token = match_token(p, tokens, args);
- ret = xfs_fc_parse_param(token, p, args, mp);
- if (ret)
- return ret;
- }
-
- return xfs_fc_validate_params(mp);
-}
-
struct proc_xfs_info {
uint64_t flag;
char *str;
xfs_log_quiesce(mp);
}
-STATIC int
-xfs_test_remount_options(
- struct super_block *sb,
- char *options)
-{
- int error = 0;
- struct xfs_mount *tmp_mp;
-
- tmp_mp = kmem_zalloc(sizeof(*tmp_mp), KM_MAYFAIL);
- if (!tmp_mp)
- return -ENOMEM;
-
- tmp_mp->m_super = sb;
- error = xfs_parseargs(tmp_mp, options);
- xfs_mount_free(tmp_mp);
-
- return error;
-}
-
static int
xfs_remount_rw(
struct xfs_mount *mp)
return 0;
}
-STATIC int
-xfs_fs_remount(
- struct super_block *sb,
- int *flags,
- char *options)
+/*
+ * Logically we would return an error here to prevent users from believing
+ * they might have changed mount options using remount which can't be changed.
+ *
+ * But unfortunately mount(8) adds all options from mtab and fstab to the mount
+ * arguments in some cases so we can't blindly reject options, but have to
+ * check for each specified option if it actually differs from the currently
+ * set option and only reject it if that's the case.
+ *
+ * Until that is implemented we return success for every remount request, and
+ * silently ignore all options that we can't actually change.
+ */
+static int
+xfs_fc_reconfigure(
+ struct fs_context *fc)
{
- struct xfs_mount *mp = XFS_M(sb);
+ struct xfs_mount *mp = XFS_M(fc->root->d_sb);
+ struct xfs_mount *new_mp = fc->s_fs_info;
xfs_sb_t *sbp = &mp->m_sb;
- substring_t args[MAX_OPT_ARGS];
- char *p;
+ int flags = fc->sb_flags;
int error;
- /* First, check for complete junk; i.e. invalid options */
- error = xfs_test_remount_options(sb, options);
+ error = xfs_fc_validate_params(new_mp);
if (error)
return error;
- sync_filesystem(sb);
- while ((p = strsep(&options, ",")) != NULL) {
- int token;
-
- if (!*p)
- continue;
-
- token = match_token(p, tokens, args);
- switch (token) {
- case Opt_inode64:
- mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
- mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
- break;
- case Opt_inode32:
- mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
- mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
- break;
- default:
- /*
- * Logically we would return an error here to prevent
- * users from believing they might have changed
- * mount options using remount which can't be changed.
- *
- * But unfortunately mount(8) adds all options from
- * mtab and fstab to the mount arguments in some cases
- * so we can't blindly reject options, but have to
- * check for each specified option if it actually
- * differs from the currently set option and only
- * reject it if that's the case.
- *
- * Until that is implemented we return success for
- * every remount request, and silently ignore all
- * options that we can't actually change.
- */
-#if 0
- xfs_info(mp,
- "mount option \"%s\" not supported for remount", p);
- return -EINVAL;
-#else
- break;
-#endif
- }
+ sync_filesystem(mp->m_super);
+
+ /* inode32 -> inode64 */
+ if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) &&
+ !(new_mp->m_flags & XFS_MOUNT_SMALL_INUMS)) {
+ mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
+ mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
+ }
+
+ /* inode64 -> inode32 */
+ if (!(mp->m_flags & XFS_MOUNT_SMALL_INUMS) &&
+ (new_mp->m_flags & XFS_MOUNT_SMALL_INUMS)) {
+ mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
+ mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
}
/* ro -> rw */
- if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & SB_RDONLY)) {
+ if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(flags & SB_RDONLY)) {
error = xfs_remount_rw(mp);
if (error)
return error;
}
/* rw -> ro */
- if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & SB_RDONLY)) {
+ if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (flags & SB_RDONLY)) {
error = xfs_remount_ro(mp);
if (error)
return error;
return mp;
}
-
-STATIC int
-xfs_fs_fill_super(
+static int
+xfs_fc_fill_super(
struct super_block *sb,
- void *data,
- int silent)
+ struct fs_context *fc)
{
+ struct xfs_mount *mp = sb->s_fs_info;
struct inode *root;
- struct xfs_mount *mp = NULL;
int flags = 0, error = -ENOMEM;
- /*
- * allocate mp and do all low-level struct initializations before we
- * attach it to the super
- */
- mp = xfs_mount_alloc();
- if (!mp)
- goto out;
mp->m_super = sb;
- sb->s_fs_info = mp;
- error = xfs_parseargs(mp, (char *)data);
+ error = xfs_fc_validate_params(mp);
if (error)
goto out_free_names;
msleep(xfs_globals.mount_delay * 1000);
}
- if (silent)
+ if (fc->sb_flags & SB_SILENT)
flags |= XFS_MFSI_QUIET;
error = xfs_open_devices(mp);
out_free_names:
sb->s_fs_info = NULL;
xfs_mount_free(mp);
- out:
return error;
out_unmount:
goto out_free_sb;
}
+static int
+xfs_fc_get_tree(
+ struct fs_context *fc)
+{
+ return get_tree_bdev(fc, xfs_fc_fill_super);
+}
+
STATIC void
xfs_fs_put_super(
struct super_block *sb)
xfs_mount_free(mp);
}
-STATIC struct dentry *
-xfs_fs_mount(
- struct file_system_type *fs_type,
- int flags,
- const char *dev_name,
- void *data)
-{
- return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
-}
-
static long
xfs_fs_nr_cached_objects(
struct super_block *sb,
.freeze_fs = xfs_fs_freeze,
.unfreeze_fs = xfs_fs_unfreeze,
.statfs = xfs_fs_statfs,
- .remount_fs = xfs_fs_remount,
.show_options = xfs_fs_show_options,
.nr_cached_objects = xfs_fs_nr_cached_objects,
.free_cached_objects = xfs_fs_free_cached_objects,
};
+static void xfs_fc_free(
+ struct fs_context *fc)
+{
+ struct xfs_mount *mp = fc->s_fs_info;
+
+ /*
+ * mp is stored in the fs_context when it is initialized.
+ * mp is transferred to the superblock on a successful mount,
+ * but if an error occurs before the transfer we have to free
+ * it here.
+ */
+ if (mp)
+ xfs_mount_free(mp);
+}
+
+static const struct fs_context_operations xfs_context_ops = {
+ .parse_param = xfs_fc_parse_param,
+ .get_tree = xfs_fc_get_tree,
+ .reconfigure = xfs_fc_reconfigure,
+ .free = xfs_fc_free,
+};
+
+static int xfs_init_fs_context(
+ struct fs_context *fc)
+{
+ struct xfs_mount *mp;
+
+ mp = xfs_mount_alloc();
+ if (!mp)
+ return -ENOMEM;
+
+ /*
+ * These can be overridden by the mount option parsing.
+ */
+ mp->m_logbufs = -1;
+ mp->m_logbsize = -1;
+ mp->m_allocsize_log = 16; /* 64k */
+
+ /*
+ * Copy binary VFS mount flags we are interested in.
+ */
+ if (fc->sb_flags & SB_RDONLY)
+ mp->m_flags |= XFS_MOUNT_RDONLY;
+ if (fc->sb_flags & SB_DIRSYNC)
+ mp->m_flags |= XFS_MOUNT_DIRSYNC;
+ if (fc->sb_flags & SB_SYNCHRONOUS)
+ mp->m_flags |= XFS_MOUNT_WSYNC;
+
+ fc->s_fs_info = mp;
+ fc->ops = &xfs_context_ops;
+
+ return 0;
+}
+
static struct file_system_type xfs_fs_type = {
.owner = THIS_MODULE,
.name = "xfs",
- .mount = xfs_fs_mount,
+ .init_fs_context = xfs_init_fs_context,
+ .parameters = &xfs_fs_parameters,
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
};
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