btrfs: Move the options parsing out to its own file
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile
index ca693dd..8e971e7 100644
--- a/fs/btrfs/Makefile
+++ b/fs/btrfs/Makefile
@@ -10,7 +10,7 @@
export.o tree-log.o free-space-cache.o zlib.o lzo.o zstd.o \
compression.o delayed-ref.o relocation.o delayed-inode.o scrub.o \
reada.o backref.o ulist.o qgroup.o send.o dev-replace.o raid56.o \
- uuid-tree.o props.o free-space-tree.o tree-checker.o
+ uuid-tree.o props.o free-space-tree.o tree-checker.o fs_params.o
btrfs-$(CONFIG_BTRFS_FS_POSIX_ACL) += acl.o
btrfs-$(CONFIG_BTRFS_FS_CHECK_INTEGRITY) += check-integrity.o
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 0a68cf7..1ca2914 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -3318,9 +3318,15 @@ void __cold btrfs_exit_sysfs(void);
int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
-/* super.c */
+/* fs_params.c */
int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
unsigned long new_flags);
+int btrfs_parse_device_options(const char *options, fmode_t flags, void *holder);
+int btrfs_parse_subvol_options(const char *options, char **subvol_name,
+ u64 *subvol_objectid);
+int btrfs_show_options(struct seq_file *seq, struct dentry *dentry);
+
+/* super.c */
int btrfs_sync_fs(struct super_block *sb, int wait);
static inline __printf(2, 3) __cold
diff --git a/fs/btrfs/fs_params.c b/fs/btrfs/fs_params.c
new file mode 100644
index 0000000..2b179ec
--- /dev/null
+++ b/fs/btrfs/fs_params.c
@@ -0,0 +1,808 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2007 Oracle. All rights reserved.
+ */
+
+#include <linux/kernel.h>
+#include <linux/parser.h>
+#include "ctree.h"
+#include "btrfs_inode.h"
+#include "compression.h"
+#include "volumes.h"
+
+enum {
+ Opt_acl, Opt_noacl,
+ Opt_clear_cache,
+ Opt_commit_interval,
+ Opt_compress,
+ Opt_compress_force,
+ Opt_compress_force_type,
+ Opt_compress_type,
+ Opt_degraded,
+ Opt_device,
+ Opt_fatal_errors,
+ Opt_flushoncommit, Opt_noflushoncommit,
+ Opt_inode_cache, Opt_noinode_cache,
+ Opt_max_inline,
+ Opt_barrier, Opt_nobarrier,
+ Opt_datacow, Opt_nodatacow,
+ Opt_datasum, Opt_nodatasum,
+ Opt_defrag, Opt_nodefrag,
+ Opt_discard, Opt_nodiscard,
+ Opt_nologreplay,
+ Opt_norecovery,
+ Opt_ratio,
+ Opt_rescan_uuid_tree,
+ Opt_skip_balance,
+ Opt_space_cache, Opt_no_space_cache,
+ Opt_space_cache_version,
+ Opt_ssd, Opt_nossd,
+ Opt_ssd_spread, Opt_nossd_spread,
+ Opt_subvol,
+ Opt_subvol_empty,
+ Opt_subvolid,
+ Opt_thread_pool,
+ Opt_treelog, Opt_notreelog,
+ Opt_usebackuproot,
+ Opt_user_subvol_rm_allowed,
+
+ /* Deprecated options */
+ Opt_alloc_start,
+ Opt_recovery,
+ Opt_subvolrootid,
+
+ /* Debugging options */
+ Opt_check_integrity,
+ Opt_check_integrity_including_extent_data,
+ Opt_check_integrity_print_mask,
+ Opt_enospc_debug, Opt_noenospc_debug,
+#ifdef CONFIG_BTRFS_DEBUG
+ Opt_fragment_data, Opt_fragment_metadata, Opt_fragment_all,
+#endif
+#ifdef CONFIG_BTRFS_FS_REF_VERIFY
+ Opt_ref_verify,
+#endif
+ Opt_err,
+};
+
+static const match_table_t tokens = {
+ {Opt_acl, "acl"},
+ {Opt_noacl, "noacl"},
+ {Opt_clear_cache, "clear_cache"},
+ {Opt_commit_interval, "commit=%u"},
+ {Opt_compress, "compress"},
+ {Opt_compress_type, "compress=%s"},
+ {Opt_compress_force, "compress-force"},
+ {Opt_compress_force_type, "compress-force=%s"},
+ {Opt_degraded, "degraded"},
+ {Opt_device, "device=%s"},
+ {Opt_fatal_errors, "fatal_errors=%s"},
+ {Opt_flushoncommit, "flushoncommit"},
+ {Opt_noflushoncommit, "noflushoncommit"},
+ {Opt_inode_cache, "inode_cache"},
+ {Opt_noinode_cache, "noinode_cache"},
+ {Opt_max_inline, "max_inline=%s"},
+ {Opt_barrier, "barrier"},
+ {Opt_nobarrier, "nobarrier"},
+ {Opt_datacow, "datacow"},
+ {Opt_nodatacow, "nodatacow"},
+ {Opt_datasum, "datasum"},
+ {Opt_nodatasum, "nodatasum"},
+ {Opt_defrag, "autodefrag"},
+ {Opt_nodefrag, "noautodefrag"},
+ {Opt_discard, "discard"},
+ {Opt_nodiscard, "nodiscard"},
+ {Opt_nologreplay, "nologreplay"},
+ {Opt_norecovery, "norecovery"},
+ {Opt_ratio, "metadata_ratio=%u"},
+ {Opt_rescan_uuid_tree, "rescan_uuid_tree"},
+ {Opt_skip_balance, "skip_balance"},
+ {Opt_space_cache, "space_cache"},
+ {Opt_no_space_cache, "nospace_cache"},
+ {Opt_space_cache_version, "space_cache=%s"},
+ {Opt_ssd, "ssd"},
+ {Opt_nossd, "nossd"},
+ {Opt_ssd_spread, "ssd_spread"},
+ {Opt_nossd_spread, "nossd_spread"},
+ {Opt_subvol, "subvol=%s"},
+ {Opt_subvol_empty, "subvol="},
+ {Opt_subvolid, "subvolid=%s"},
+ {Opt_thread_pool, "thread_pool=%u"},
+ {Opt_treelog, "treelog"},
+ {Opt_notreelog, "notreelog"},
+ {Opt_usebackuproot, "usebackuproot"},
+ {Opt_user_subvol_rm_allowed, "user_subvol_rm_allowed"},
+
+ /* Deprecated options */
+ {Opt_alloc_start, "alloc_start=%s"},
+ {Opt_recovery, "recovery"},
+ {Opt_subvolrootid, "subvolrootid=%d"},
+
+ /* Debugging options */
+ {Opt_check_integrity, "check_int"},
+ {Opt_check_integrity_including_extent_data, "check_int_data"},
+ {Opt_check_integrity_print_mask, "check_int_print_mask=%u"},
+ {Opt_enospc_debug, "enospc_debug"},
+ {Opt_noenospc_debug, "noenospc_debug"},
+#ifdef CONFIG_BTRFS_DEBUG
+ {Opt_fragment_data, "fragment=data"},
+ {Opt_fragment_metadata, "fragment=metadata"},
+ {Opt_fragment_all, "fragment=all"},
+#endif
+#ifdef CONFIG_BTRFS_FS_REF_VERIFY
+ {Opt_ref_verify, "ref_verify"},
+#endif
+ {Opt_err, NULL},
+};
+
+/*
+ * Regular mount options parser. Everything that is needed only when
+ * reading in a new superblock is parsed here.
+ * XXX JDM: This needs to be cleaned up for remount.
+ */
+int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
+ unsigned long new_flags)
+{
+ substring_t args[MAX_OPT_ARGS];
+ char *p, *num;
+ u64 cache_gen;
+ int intarg;
+ int ret = 0;
+ char *compress_type;
+ bool compress_force = false;
+ enum btrfs_compression_type saved_compress_type;
+ bool saved_compress_force;
+ int no_compress = 0;
+
+ cache_gen = btrfs_super_cache_generation(info->super_copy);
+ if (btrfs_fs_compat_ro(info, FREE_SPACE_TREE))
+ btrfs_set_opt(info->mount_opt, FREE_SPACE_TREE);
+ else if (cache_gen)
+ btrfs_set_opt(info->mount_opt, SPACE_CACHE);
+
+ /*
+ * Even the options are empty, we still need to do extra check
+ * against new flags
+ */
+ if (!options)
+ goto check;
+
+ while ((p = strsep(&options, ",")) != NULL) {
+ int token;
+ if (!*p)
+ continue;
+
+ token = match_token(p, tokens, args);
+ switch (token) {
+ case Opt_degraded:
+ btrfs_info(info, "allowing degraded mounts");
+ btrfs_set_opt(info->mount_opt, DEGRADED);
+ break;
+ case Opt_subvol:
+ case Opt_subvol_empty:
+ case Opt_subvolid:
+ case Opt_subvolrootid:
+ case Opt_device:
+ /*
+ * These are parsed by btrfs_parse_subvol_options or
+ * btrfs_parse_device_options and can be ignored here.
+ */
+ break;
+ case Opt_nodatasum:
+ btrfs_set_and_info(info, NODATASUM,
+ "setting nodatasum");
+ break;
+ case Opt_datasum:
+ if (btrfs_test_opt(info, NODATASUM)) {
+ if (btrfs_test_opt(info, NODATACOW))
+ btrfs_info(info,
+ "setting datasum, datacow enabled");
+ else
+ btrfs_info(info, "setting datasum");
+ }
+ btrfs_clear_opt(info->mount_opt, NODATACOW);
+ btrfs_clear_opt(info->mount_opt, NODATASUM);
+ break;
+ case Opt_nodatacow:
+ if (!btrfs_test_opt(info, NODATACOW)) {
+ if (!btrfs_test_opt(info, COMPRESS) ||
+ !btrfs_test_opt(info, FORCE_COMPRESS)) {
+ btrfs_info(info,
+ "setting nodatacow, compression disabled");
+ } else {
+ btrfs_info(info, "setting nodatacow");
+ }
+ }
+ btrfs_clear_opt(info->mount_opt, COMPRESS);
+ btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS);
+ btrfs_set_opt(info->mount_opt, NODATACOW);
+ btrfs_set_opt(info->mount_opt, NODATASUM);
+ break;
+ case Opt_datacow:
+ btrfs_clear_and_info(info, NODATACOW,
+ "setting datacow");
+ break;
+ case Opt_compress_force:
+ case Opt_compress_force_type:
+ compress_force = true;
+ /* Fallthrough */
+ case Opt_compress:
+ case Opt_compress_type:
+ saved_compress_type = btrfs_test_opt(info,
+ COMPRESS) ?
+ info->compress_type : BTRFS_COMPRESS_NONE;
+ saved_compress_force =
+ btrfs_test_opt(info, FORCE_COMPRESS);
+ if (token == Opt_compress ||
+ token == Opt_compress_force ||
+ strncmp(args[0].from, "zlib", 4) == 0) {
+ compress_type = "zlib";
+
+ info->compress_type = BTRFS_COMPRESS_ZLIB;
+ info->compress_level = BTRFS_ZLIB_DEFAULT_LEVEL;
+ /*
+ * args[0] contains uninitialized data since
+ * for these tokens we don't expect any
+ * parameter.
+ */
+ if (token != Opt_compress &&
+ token != Opt_compress_force)
+ info->compress_level =
+ btrfs_compress_str2level(args[0].from);
+ btrfs_set_opt(info->mount_opt, COMPRESS);
+ btrfs_clear_opt(info->mount_opt, NODATACOW);
+ btrfs_clear_opt(info->mount_opt, NODATASUM);
+ no_compress = 0;
+ } else if (strncmp(args[0].from, "lzo", 3) == 0) {
+ compress_type = "lzo";
+ info->compress_type = BTRFS_COMPRESS_LZO;
+ btrfs_set_opt(info->mount_opt, COMPRESS);
+ btrfs_clear_opt(info->mount_opt, NODATACOW);
+ btrfs_clear_opt(info->mount_opt, NODATASUM);
+ btrfs_set_fs_incompat(info, COMPRESS_LZO);
+ no_compress = 0;
+ } else if (strcmp(args[0].from, "zstd") == 0) {
+ compress_type = "zstd";
+ info->compress_type = BTRFS_COMPRESS_ZSTD;
+ btrfs_set_opt(info->mount_opt, COMPRESS);
+ btrfs_clear_opt(info->mount_opt, NODATACOW);
+ btrfs_clear_opt(info->mount_opt, NODATASUM);
+ btrfs_set_fs_incompat(info, COMPRESS_ZSTD);
+ no_compress = 0;
+ } else if (strncmp(args[0].from, "no", 2) == 0) {
+ compress_type = "no";
+ btrfs_clear_opt(info->mount_opt, COMPRESS);
+ btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS);
+ compress_force = false;
+ no_compress++;
+ } else {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (compress_force) {
+ btrfs_set_opt(info->mount_opt, FORCE_COMPRESS);
+ } else {
+ /*
+ * If we remount from compress-force=xxx to
+ * compress=xxx, we need clear FORCE_COMPRESS
+ * flag, otherwise, there is no way for users
+ * to disable forcible compression separately.
+ */
+ btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS);
+ }
+ if ((btrfs_test_opt(info, COMPRESS) &&
+ (info->compress_type != saved_compress_type ||
+ compress_force != saved_compress_force)) ||
+ (!btrfs_test_opt(info, COMPRESS) &&
+ no_compress == 1)) {
+ btrfs_info(info, "%s %s compression, level %d",
+ (compress_force) ? "force" : "use",
+ compress_type, info->compress_level);
+ }
+ compress_force = false;
+ break;
+ case Opt_ssd:
+ btrfs_set_and_info(info, SSD,
+ "enabling ssd optimizations");
+ btrfs_clear_opt(info->mount_opt, NOSSD);
+ break;
+ case Opt_ssd_spread:
+ btrfs_set_and_info(info, SSD,
+ "enabling ssd optimizations");
+ btrfs_set_and_info(info, SSD_SPREAD,
+ "using spread ssd allocation scheme");
+ btrfs_clear_opt(info->mount_opt, NOSSD);
+ break;
+ case Opt_nossd:
+ btrfs_set_opt(info->mount_opt, NOSSD);
+ btrfs_clear_and_info(info, SSD,
+ "not using ssd optimizations");
+ /* Fallthrough */
+ case Opt_nossd_spread:
+ btrfs_clear_and_info(info, SSD_SPREAD,
+ "not using spread ssd allocation scheme");
+ break;
+ case Opt_barrier:
+ btrfs_clear_and_info(info, NOBARRIER,
+ "turning on barriers");
+ break;
+ case Opt_nobarrier:
+ btrfs_set_and_info(info, NOBARRIER,
+ "turning off barriers");
+ break;
+ case Opt_thread_pool:
+ ret = match_int(&args[0], &intarg);
+ if (ret) {
+ goto out;
+ } else if (intarg == 0) {
+ ret = -EINVAL;
+ goto out;
+ }
+ info->thread_pool_size = intarg;
+ break;
+ case Opt_max_inline:
+ num = match_strdup(&args[0]);
+ if (num) {
+ info->max_inline = memparse(num, NULL);
+ kfree(num);
+
+ if (info->max_inline) {
+ info->max_inline = min_t(u64,
+ info->max_inline,
+ info->sectorsize);
+ }
+ btrfs_info(info, "max_inline at %llu",
+ info->max_inline);
+ } else {
+ ret = -ENOMEM;
+ goto out;
+ }
+ break;
+ case Opt_alloc_start:
+ btrfs_info(info,
+ "option alloc_start is obsolete, ignored");
+ break;
+ case Opt_acl:
+#ifdef CONFIG_BTRFS_FS_POSIX_ACL
+ info->sb->s_flags |= SB_POSIXACL;
+ break;
+#else
+ btrfs_err(info, "support for ACL not compiled in!");
+ ret = -EINVAL;
+ goto out;
+#endif
+ case Opt_noacl:
+ info->sb->s_flags &= ~SB_POSIXACL;
+ break;
+ case Opt_notreelog:
+ btrfs_set_and_info(info, NOTREELOG,
+ "disabling tree log");
+ break;
+ case Opt_treelog:
+ btrfs_clear_and_info(info, NOTREELOG,
+ "enabling tree log");
+ break;
+ case Opt_norecovery:
+ case Opt_nologreplay:
+ btrfs_set_and_info(info, NOLOGREPLAY,
+ "disabling log replay at mount time");
+ break;
+ case Opt_flushoncommit:
+ btrfs_set_and_info(info, FLUSHONCOMMIT,
+ "turning on flush-on-commit");
+ break;
+ case Opt_noflushoncommit:
+ btrfs_clear_and_info(info, FLUSHONCOMMIT,
+ "turning off flush-on-commit");
+ break;
+ case Opt_ratio:
+ ret = match_int(&args[0], &intarg);
+ if (ret)
+ goto out;
+ info->metadata_ratio = intarg;
+ btrfs_info(info, "metadata ratio %u",
+ info->metadata_ratio);
+ break;
+ case Opt_discard:
+ btrfs_set_and_info(info, DISCARD,
+ "turning on discard");
+ break;
+ case Opt_nodiscard:
+ btrfs_clear_and_info(info, DISCARD,
+ "turning off discard");
+ break;
+ case Opt_space_cache:
+ case Opt_space_cache_version:
+ if (token == Opt_space_cache ||
+ strcmp(args[0].from, "v1") == 0) {
+ btrfs_clear_opt(info->mount_opt,
+ FREE_SPACE_TREE);
+ btrfs_set_and_info(info, SPACE_CACHE,
+ "enabling disk space caching");
+ } else if (strcmp(args[0].from, "v2") == 0) {
+ btrfs_clear_opt(info->mount_opt,
+ SPACE_CACHE);
+ btrfs_set_and_info(info, FREE_SPACE_TREE,
+ "enabling free space tree");
+ } else {
+ ret = -EINVAL;
+ goto out;
+ }
+ break;
+ case Opt_rescan_uuid_tree:
+ btrfs_set_opt(info->mount_opt, RESCAN_UUID_TREE);
+ break;
+ case Opt_no_space_cache:
+ if (btrfs_test_opt(info, SPACE_CACHE)) {
+ btrfs_clear_and_info(info, SPACE_CACHE,
+ "disabling disk space caching");
+ }
+ if (btrfs_test_opt(info, FREE_SPACE_TREE)) {
+ btrfs_clear_and_info(info, FREE_SPACE_TREE,
+ "disabling free space tree");
+ }
+ break;
+ case Opt_inode_cache:
+ btrfs_set_pending_and_info(info, INODE_MAP_CACHE,
+ "enabling inode map caching");
+ break;
+ case Opt_noinode_cache:
+ btrfs_clear_pending_and_info(info, INODE_MAP_CACHE,
+ "disabling inode map caching");
+ break;
+ case Opt_clear_cache:
+ btrfs_set_and_info(info, CLEAR_CACHE,
+ "force clearing of disk cache");
+ break;
+ case Opt_user_subvol_rm_allowed:
+ btrfs_set_opt(info->mount_opt, USER_SUBVOL_RM_ALLOWED);
+ break;
+ case Opt_enospc_debug:
+ btrfs_set_opt(info->mount_opt, ENOSPC_DEBUG);
+ break;
+ case Opt_noenospc_debug:
+ btrfs_clear_opt(info->mount_opt, ENOSPC_DEBUG);
+ break;
+ case Opt_defrag:
+ btrfs_set_and_info(info, AUTO_DEFRAG,
+ "enabling auto defrag");
+ break;
+ case Opt_nodefrag:
+ btrfs_clear_and_info(info, AUTO_DEFRAG,
+ "disabling auto defrag");
+ break;
+ case Opt_recovery:
+ btrfs_warn(info,
+ "'recovery' is deprecated, use 'usebackuproot' instead");
+ /* fall through */
+ case Opt_usebackuproot:
+ btrfs_info(info,
+ "trying to use backup root at mount time");
+ btrfs_set_opt(info->mount_opt, USEBACKUPROOT);
+ break;
+ case Opt_skip_balance:
+ btrfs_set_opt(info->mount_opt, SKIP_BALANCE);
+ break;
+#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
+ case Opt_check_integrity_including_extent_data:
+ btrfs_info(info,
+ "enabling check integrity including extent data");
+ btrfs_set_opt(info->mount_opt,
+ CHECK_INTEGRITY_INCLUDING_EXTENT_DATA);
+ btrfs_set_opt(info->mount_opt, CHECK_INTEGRITY);
+ break;
+ case Opt_check_integrity:
+ btrfs_info(info, "enabling check integrity");
+ btrfs_set_opt(info->mount_opt, CHECK_INTEGRITY);
+ break;
+ case Opt_check_integrity_print_mask:
+ ret = match_int(&args[0], &intarg);
+ if (ret)
+ goto out;
+ info->check_integrity_print_mask = intarg;
+ btrfs_info(info, "check_integrity_print_mask 0x%x",
+ info->check_integrity_print_mask);
+ break;
+#else
+ case Opt_check_integrity_including_extent_data:
+ case Opt_check_integrity:
+ case Opt_check_integrity_print_mask:
+ btrfs_err(info,
+ "support for check_integrity* not compiled in!");
+ ret = -EINVAL;
+ goto out;
+#endif
+ case Opt_fatal_errors:
+ if (strcmp(args[0].from, "panic") == 0)
+ btrfs_set_opt(info->mount_opt,
+ PANIC_ON_FATAL_ERROR);
+ else if (strcmp(args[0].from, "bug") == 0)
+ btrfs_clear_opt(info->mount_opt,
+ PANIC_ON_FATAL_ERROR);
+ else {
+ ret = -EINVAL;
+ goto out;
+ }
+ break;
+ case Opt_commit_interval:
+ intarg = 0;
+ ret = match_int(&args[0], &intarg);
+ if (ret)
+ goto out;
+ if (intarg == 0) {
+ btrfs_info(info,
+ "using default commit interval %us",
+ BTRFS_DEFAULT_COMMIT_INTERVAL);
+ intarg = BTRFS_DEFAULT_COMMIT_INTERVAL;
+ } else if (intarg > 300) {
+ btrfs_warn(info, "excessive commit interval %d",
+ intarg);
+ }
+ info->commit_interval = intarg;
+ break;
+#ifdef CONFIG_BTRFS_DEBUG
+ case Opt_fragment_all:
+ btrfs_info(info, "fragmenting all space");
+ btrfs_set_opt(info->mount_opt, FRAGMENT_DATA);
+ btrfs_set_opt(info->mount_opt, FRAGMENT_METADATA);
+ break;
+ case Opt_fragment_metadata:
+ btrfs_info(info, "fragmenting metadata");
+ btrfs_set_opt(info->mount_opt,
+ FRAGMENT_METADATA);
+ break;
+ case Opt_fragment_data:
+ btrfs_info(info, "fragmenting data");
+ btrfs_set_opt(info->mount_opt, FRAGMENT_DATA);
+ break;
+#endif
+#ifdef CONFIG_BTRFS_FS_REF_VERIFY
+ case Opt_ref_verify:
+ btrfs_info(info, "doing ref verification");
+ btrfs_set_opt(info->mount_opt, REF_VERIFY);
+ break;
+#endif
+ case Opt_err:
+ btrfs_info(info, "unrecognized mount option '%s'", p);
+ ret = -EINVAL;
+ goto out;
+ default:
+ break;
+ }
+ }
+check:
+ /*
+ * Extra check for current option against current flag
+ */
+ if (btrfs_test_opt(info, NOLOGREPLAY) && !(new_flags & SB_RDONLY)) {
+ btrfs_err(info,
+ "nologreplay must be used with ro mount option");
+ ret = -EINVAL;
+ }
+out:
+ if (btrfs_fs_compat_ro(info, FREE_SPACE_TREE) &&
+ !btrfs_test_opt(info, FREE_SPACE_TREE) &&
+ !btrfs_test_opt(info, CLEAR_CACHE)) {
+ btrfs_err(info, "cannot disable free space tree");
+ ret = -EINVAL;
+
+ }
+ if (!ret && btrfs_test_opt(info, SPACE_CACHE))
+ btrfs_info(info, "disk space caching is enabled");
+ if (!ret && btrfs_test_opt(info, FREE_SPACE_TREE))
+ btrfs_info(info, "using free space tree");
+ return ret;
+}
+
+/*
+ * Parse mount options that are required early in the mount process.
+ *
+ * All other options will be parsed on much later in the mount process and
+ * only when we need to allocate a new super block.
+ */
+int btrfs_parse_device_options(const char *options, fmode_t flags, void *holder)
+{
+ substring_t args[MAX_OPT_ARGS];
+ char *device_name, *opts, *orig, *p;
+ struct btrfs_device *device = NULL;
+ int error = 0;
+
+ lockdep_assert_held(&uuid_mutex);
+
+ if (!options)
+ return 0;
+
+ /*
+ * strsep changes the string, duplicate it because btrfs_parse_options
+ * gets called later
+ */
+ opts = kstrdup(options, GFP_KERNEL);
+ if (!opts)
+ return -ENOMEM;
+ orig = opts;
+
+ while ((p = strsep(&opts, ",")) != NULL) {
+ int token;
+
+ if (!*p)
+ continue;
+
+ token = match_token(p, tokens, args);
+ if (token == Opt_device) {
+ device_name = match_strdup(&args[0]);
+ if (!device_name) {
+ error = -ENOMEM;
+ goto out;
+ }
+ device = btrfs_scan_one_device(device_name, flags,
+ holder);
+ kfree(device_name);
+ if (IS_ERR(device)) {
+ error = PTR_ERR(device);
+ goto out;
+ }
+ }
+ }
+
+out:
+ kfree(orig);
+ return error;
+}
+
+/*
+ * Parse mount options that are related to subvolume id
+ *
+ * The value is later passed to mount_subvol()
+ */
+int btrfs_parse_subvol_options(const char *options, char **subvol_name,
+ u64 *subvol_objectid)
+{
+ substring_t args[MAX_OPT_ARGS];
+ char *opts, *orig, *p;
+ int error = 0;
+ u64 subvolid;
+
+ if (!options)
+ return 0;
+
+ /*
+ * strsep changes the string, duplicate it because
+ * btrfs_parse_device_options gets called later
+ */
+ opts = kstrdup(options, GFP_KERNEL);
+ if (!opts)
+ return -ENOMEM;
+ orig = opts;
+
+ while ((p = strsep(&opts, ",")) != NULL) {
+ int token;
+ if (!*p)
+ continue;
+
+ token = match_token(p, tokens, args);
+ switch (token) {
+ case Opt_subvol:
+ kfree(*subvol_name);
+ *subvol_name = match_strdup(&args[0]);
+ if (!*subvol_name) {
+ error = -ENOMEM;
+ goto out;
+ }
+ break;
+ case Opt_subvolid:
+ error = match_u64(&args[0], &subvolid);
+ if (error)
+ goto out;
+
+ /* we want the original fs_tree */
+ if (subvolid == 0)
+ subvolid = BTRFS_FS_TREE_OBJECTID;
+
+ *subvol_objectid = subvolid;
+ break;
+ case Opt_subvolrootid:
+ pr_warn("BTRFS: 'subvolrootid' mount option is deprecated and has no effect\n");
+ break;
+ default:
+ break;
+ }
+ }
+
+out:
+ kfree(orig);
+ return error;
+}
+
+int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
+{
+ struct btrfs_fs_info *info = btrfs_sb(dentry->d_sb);
+ const char *compress_type;
+
+ if (btrfs_test_opt(info, DEGRADED))
+ seq_puts(seq, ",degraded");
+ if (btrfs_test_opt(info, NODATASUM))
+ seq_puts(seq, ",nodatasum");
+ if (btrfs_test_opt(info, NODATACOW))
+ seq_puts(seq, ",nodatacow");
+ if (btrfs_test_opt(info, NOBARRIER))
+ seq_puts(seq, ",nobarrier");
+ if (info->max_inline != BTRFS_DEFAULT_MAX_INLINE)
+ seq_printf(seq, ",max_inline=%llu", info->max_inline);
+ if (info->thread_pool_size != min_t(unsigned long,
+ num_online_cpus() + 2, 8))
+ seq_printf(seq, ",thread_pool=%u", info->thread_pool_size);
+ if (btrfs_test_opt(info, COMPRESS)) {
+ compress_type = btrfs_compress_type2str(info->compress_type);
+ if (btrfs_test_opt(info, FORCE_COMPRESS))
+ seq_printf(seq, ",compress-force=%s", compress_type);
+ else
+ seq_printf(seq, ",compress=%s", compress_type);
+ if (info->compress_level)
+ seq_printf(seq, ":%d", info->compress_level);
+ }
+ if (btrfs_test_opt(info, NOSSD))
+ seq_puts(seq, ",nossd");
+ if (btrfs_test_opt(info, SSD_SPREAD))
+ seq_puts(seq, ",ssd_spread");
+ else if (btrfs_test_opt(info, SSD))
+ seq_puts(seq, ",ssd");
+ if (btrfs_test_opt(info, NOTREELOG))
+ seq_puts(seq, ",notreelog");
+ if (btrfs_test_opt(info, NOLOGREPLAY))
+ seq_puts(seq, ",nologreplay");
+ if (btrfs_test_opt(info, FLUSHONCOMMIT))
+ seq_puts(seq, ",flushoncommit");
+ if (btrfs_test_opt(info, DISCARD))
+ seq_puts(seq, ",discard");
+ if (!(info->sb->s_flags & SB_POSIXACL))
+ seq_puts(seq, ",noacl");
+ if (btrfs_test_opt(info, SPACE_CACHE))
+ seq_puts(seq, ",space_cache");
+ else if (btrfs_test_opt(info, FREE_SPACE_TREE))
+ seq_puts(seq, ",space_cache=v2");
+ else
+ seq_puts(seq, ",nospace_cache");
+ if (btrfs_test_opt(info, RESCAN_UUID_TREE))
+ seq_puts(seq, ",rescan_uuid_tree");
+ if (btrfs_test_opt(info, CLEAR_CACHE))
+ seq_puts(seq, ",clear_cache");
+ if (btrfs_test_opt(info, USER_SUBVOL_RM_ALLOWED))
+ seq_puts(seq, ",user_subvol_rm_allowed");
+ if (btrfs_test_opt(info, ENOSPC_DEBUG))
+ seq_puts(seq, ",enospc_debug");
+ if (btrfs_test_opt(info, AUTO_DEFRAG))
+ seq_puts(seq, ",autodefrag");
+ if (btrfs_test_opt(info, INODE_MAP_CACHE))
+ seq_puts(seq, ",inode_cache");
+ if (btrfs_test_opt(info, SKIP_BALANCE))
+ seq_puts(seq, ",skip_balance");
+#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
+ if (btrfs_test_opt(info, CHECK_INTEGRITY_INCLUDING_EXTENT_DATA))
+ seq_puts(seq, ",check_int_data");
+ else if (btrfs_test_opt(info, CHECK_INTEGRITY))
+ seq_puts(seq, ",check_int");
+ if (info->check_integrity_print_mask)
+ seq_printf(seq, ",check_int_print_mask=%d",
+ info->check_integrity_print_mask);
+#endif
+ if (info->metadata_ratio)
+ seq_printf(seq, ",metadata_ratio=%u", info->metadata_ratio);
+ if (btrfs_test_opt(info, PANIC_ON_FATAL_ERROR))
+ seq_puts(seq, ",fatal_errors=panic");
+ if (info->commit_interval != BTRFS_DEFAULT_COMMIT_INTERVAL)
+ seq_printf(seq, ",commit=%u", info->commit_interval);
+#ifdef CONFIG_BTRFS_DEBUG
+ if (btrfs_test_opt(info, FRAGMENT_DATA))
+ seq_puts(seq, ",fragment=data");
+ if (btrfs_test_opt(info, FRAGMENT_METADATA))
+ seq_puts(seq, ",fragment=metadata");
+#endif
+ if (btrfs_test_opt(info, REF_VERIFY))
+ seq_puts(seq, ",ref_verify");
+ seq_printf(seq, ",subvolid=%llu",
+ BTRFS_I(d_inode(dentry))->root->root_key.objectid);
+ seq_puts(seq, ",subvol=");
+ seq_dentry(seq, dentry, " \t\n\\");
+ return 0;
+}
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index c5586ff..c7a0735 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -291,711 +291,6 @@ static void btrfs_put_super(struct super_block *sb)
close_ctree(btrfs_sb(sb));
}
-enum {
- Opt_acl, Opt_noacl,
- Opt_clear_cache,
- Opt_commit_interval,
- Opt_compress,
- Opt_compress_force,
- Opt_compress_force_type,
- Opt_compress_type,
- Opt_degraded,
- Opt_device,
- Opt_fatal_errors,
- Opt_flushoncommit, Opt_noflushoncommit,
- Opt_inode_cache, Opt_noinode_cache,
- Opt_max_inline,
- Opt_barrier, Opt_nobarrier,
- Opt_datacow, Opt_nodatacow,
- Opt_datasum, Opt_nodatasum,
- Opt_defrag, Opt_nodefrag,
- Opt_discard, Opt_nodiscard,
- Opt_nologreplay,
- Opt_norecovery,
- Opt_ratio,
- Opt_rescan_uuid_tree,
- Opt_skip_balance,
- Opt_space_cache, Opt_no_space_cache,
- Opt_space_cache_version,
- Opt_ssd, Opt_nossd,
- Opt_ssd_spread, Opt_nossd_spread,
- Opt_subvol,
- Opt_subvol_empty,
- Opt_subvolid,
- Opt_thread_pool,
- Opt_treelog, Opt_notreelog,
- Opt_usebackuproot,
- Opt_user_subvol_rm_allowed,
-
- /* Deprecated options */
- Opt_alloc_start,
- Opt_recovery,
- Opt_subvolrootid,
-
- /* Debugging options */
- Opt_check_integrity,
- Opt_check_integrity_including_extent_data,
- Opt_check_integrity_print_mask,
- Opt_enospc_debug, Opt_noenospc_debug,
-#ifdef CONFIG_BTRFS_DEBUG
- Opt_fragment_data, Opt_fragment_metadata, Opt_fragment_all,
-#endif
-#ifdef CONFIG_BTRFS_FS_REF_VERIFY
- Opt_ref_verify,
-#endif
- Opt_err,
-};
-
-static const match_table_t tokens = {
- {Opt_acl, "acl"},
- {Opt_noacl, "noacl"},
- {Opt_clear_cache, "clear_cache"},
- {Opt_commit_interval, "commit=%u"},
- {Opt_compress, "compress"},
- {Opt_compress_type, "compress=%s"},
- {Opt_compress_force, "compress-force"},
- {Opt_compress_force_type, "compress-force=%s"},
- {Opt_degraded, "degraded"},
- {Opt_device, "device=%s"},
- {Opt_fatal_errors, "fatal_errors=%s"},
- {Opt_flushoncommit, "flushoncommit"},
- {Opt_noflushoncommit, "noflushoncommit"},
- {Opt_inode_cache, "inode_cache"},
- {Opt_noinode_cache, "noinode_cache"},
- {Opt_max_inline, "max_inline=%s"},
- {Opt_barrier, "barrier"},
- {Opt_nobarrier, "nobarrier"},
- {Opt_datacow, "datacow"},
- {Opt_nodatacow, "nodatacow"},
- {Opt_datasum, "datasum"},
- {Opt_nodatasum, "nodatasum"},
- {Opt_defrag, "autodefrag"},
- {Opt_nodefrag, "noautodefrag"},
- {Opt_discard, "discard"},
- {Opt_nodiscard, "nodiscard"},
- {Opt_nologreplay, "nologreplay"},
- {Opt_norecovery, "norecovery"},
- {Opt_ratio, "metadata_ratio=%u"},
- {Opt_rescan_uuid_tree, "rescan_uuid_tree"},
- {Opt_skip_balance, "skip_balance"},
- {Opt_space_cache, "space_cache"},
- {Opt_no_space_cache, "nospace_cache"},
- {Opt_space_cache_version, "space_cache=%s"},
- {Opt_ssd, "ssd"},
- {Opt_nossd, "nossd"},
- {Opt_ssd_spread, "ssd_spread"},
- {Opt_nossd_spread, "nossd_spread"},
- {Opt_subvol, "subvol=%s"},
- {Opt_subvol_empty, "subvol="},
- {Opt_subvolid, "subvolid=%s"},
- {Opt_thread_pool, "thread_pool=%u"},
- {Opt_treelog, "treelog"},
- {Opt_notreelog, "notreelog"},
- {Opt_usebackuproot, "usebackuproot"},
- {Opt_user_subvol_rm_allowed, "user_subvol_rm_allowed"},
-
- /* Deprecated options */
- {Opt_alloc_start, "alloc_start=%s"},
- {Opt_recovery, "recovery"},
- {Opt_subvolrootid, "subvolrootid=%d"},
-
- /* Debugging options */
- {Opt_check_integrity, "check_int"},
- {Opt_check_integrity_including_extent_data, "check_int_data"},
- {Opt_check_integrity_print_mask, "check_int_print_mask=%u"},
- {Opt_enospc_debug, "enospc_debug"},
- {Opt_noenospc_debug, "noenospc_debug"},
-#ifdef CONFIG_BTRFS_DEBUG
- {Opt_fragment_data, "fragment=data"},
- {Opt_fragment_metadata, "fragment=metadata"},
- {Opt_fragment_all, "fragment=all"},
-#endif
-#ifdef CONFIG_BTRFS_FS_REF_VERIFY
- {Opt_ref_verify, "ref_verify"},
-#endif
- {Opt_err, NULL},
-};
-
-/*
- * Regular mount options parser. Everything that is needed only when
- * reading in a new superblock is parsed here.
- * XXX JDM: This needs to be cleaned up for remount.
- */
-int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
- unsigned long new_flags)
-{
- substring_t args[MAX_OPT_ARGS];
- char *p, *num;
- u64 cache_gen;
- int intarg;
- int ret = 0;
- char *compress_type;
- bool compress_force = false;
- enum btrfs_compression_type saved_compress_type;
- bool saved_compress_force;
- int no_compress = 0;
-
- cache_gen = btrfs_super_cache_generation(info->super_copy);
- if (btrfs_fs_compat_ro(info, FREE_SPACE_TREE))
- btrfs_set_opt(info->mount_opt, FREE_SPACE_TREE);
- else if (cache_gen)
- btrfs_set_opt(info->mount_opt, SPACE_CACHE);
-
- /*
- * Even the options are empty, we still need to do extra check
- * against new flags
- */
- if (!options)
- goto check;
-
- while ((p = strsep(&options, ",")) != NULL) {
- int token;
- if (!*p)
- continue;
-
- token = match_token(p, tokens, args);
- switch (token) {
- case Opt_degraded:
- btrfs_info(info, "allowing degraded mounts");
- btrfs_set_opt(info->mount_opt, DEGRADED);
- break;
- case Opt_subvol:
- case Opt_subvol_empty:
- case Opt_subvolid:
- case Opt_subvolrootid:
- case Opt_device:
- /*
- * These are parsed by btrfs_parse_subvol_options or
- * btrfs_parse_device_options and can be ignored here.
- */
- break;
- case Opt_nodatasum:
- btrfs_set_and_info(info, NODATASUM,
- "setting nodatasum");
- break;
- case Opt_datasum:
- if (btrfs_test_opt(info, NODATASUM)) {
- if (btrfs_test_opt(info, NODATACOW))
- btrfs_info(info,
- "setting datasum, datacow enabled");
- else
- btrfs_info(info, "setting datasum");
- }
- btrfs_clear_opt(info->mount_opt, NODATACOW);
- btrfs_clear_opt(info->mount_opt, NODATASUM);
- break;
- case Opt_nodatacow:
- if (!btrfs_test_opt(info, NODATACOW)) {
- if (!btrfs_test_opt(info, COMPRESS) ||
- !btrfs_test_opt(info, FORCE_COMPRESS)) {
- btrfs_info(info,
- "setting nodatacow, compression disabled");
- } else {
- btrfs_info(info, "setting nodatacow");
- }
- }
- btrfs_clear_opt(info->mount_opt, COMPRESS);
- btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS);
- btrfs_set_opt(info->mount_opt, NODATACOW);
- btrfs_set_opt(info->mount_opt, NODATASUM);
- break;
- case Opt_datacow:
- btrfs_clear_and_info(info, NODATACOW,
- "setting datacow");
- break;
- case Opt_compress_force:
- case Opt_compress_force_type:
- compress_force = true;
- /* Fallthrough */
- case Opt_compress:
- case Opt_compress_type:
- saved_compress_type = btrfs_test_opt(info,
- COMPRESS) ?
- info->compress_type : BTRFS_COMPRESS_NONE;
- saved_compress_force =
- btrfs_test_opt(info, FORCE_COMPRESS);
- if (token == Opt_compress ||
- token == Opt_compress_force ||
- strncmp(args[0].from, "zlib", 4) == 0) {
- compress_type = "zlib";
-
- info->compress_type = BTRFS_COMPRESS_ZLIB;
- info->compress_level = BTRFS_ZLIB_DEFAULT_LEVEL;
- /*
- * args[0] contains uninitialized data since
- * for these tokens we don't expect any
- * parameter.
- */
- if (token != Opt_compress &&
- token != Opt_compress_force)
- info->compress_level =
- btrfs_compress_str2level(args[0].from);
- btrfs_set_opt(info->mount_opt, COMPRESS);
- btrfs_clear_opt(info->mount_opt, NODATACOW);
- btrfs_clear_opt(info->mount_opt, NODATASUM);
- no_compress = 0;
- } else if (strncmp(args[0].from, "lzo", 3) == 0) {
- compress_type = "lzo";
- info->compress_type = BTRFS_COMPRESS_LZO;
- btrfs_set_opt(info->mount_opt, COMPRESS);
- btrfs_clear_opt(info->mount_opt, NODATACOW);
- btrfs_clear_opt(info->mount_opt, NODATASUM);
- btrfs_set_fs_incompat(info, COMPRESS_LZO);
- no_compress = 0;
- } else if (strcmp(args[0].from, "zstd") == 0) {
- compress_type = "zstd";
- info->compress_type = BTRFS_COMPRESS_ZSTD;
- btrfs_set_opt(info->mount_opt, COMPRESS);
- btrfs_clear_opt(info->mount_opt, NODATACOW);
- btrfs_clear_opt(info->mount_opt, NODATASUM);
- btrfs_set_fs_incompat(info, COMPRESS_ZSTD);
- no_compress = 0;
- } else if (strncmp(args[0].from, "no", 2) == 0) {
- compress_type = "no";
- btrfs_clear_opt(info->mount_opt, COMPRESS);
- btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS);
- compress_force = false;
- no_compress++;
- } else {
- ret = -EINVAL;
- goto out;
- }
-
- if (compress_force) {
- btrfs_set_opt(info->mount_opt, FORCE_COMPRESS);
- } else {
- /*
- * If we remount from compress-force=xxx to
- * compress=xxx, we need clear FORCE_COMPRESS
- * flag, otherwise, there is no way for users
- * to disable forcible compression separately.
- */
- btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS);
- }
- if ((btrfs_test_opt(info, COMPRESS) &&
- (info->compress_type != saved_compress_type ||
- compress_force != saved_compress_force)) ||
- (!btrfs_test_opt(info, COMPRESS) &&
- no_compress == 1)) {
- btrfs_info(info, "%s %s compression, level %d",
- (compress_force) ? "force" : "use",
- compress_type, info->compress_level);
- }
- compress_force = false;
- break;
- case Opt_ssd:
- btrfs_set_and_info(info, SSD,
- "enabling ssd optimizations");
- btrfs_clear_opt(info->mount_opt, NOSSD);
- break;
- case Opt_ssd_spread:
- btrfs_set_and_info(info, SSD,
- "enabling ssd optimizations");
- btrfs_set_and_info(info, SSD_SPREAD,
- "using spread ssd allocation scheme");
- btrfs_clear_opt(info->mount_opt, NOSSD);
- break;
- case Opt_nossd:
- btrfs_set_opt(info->mount_opt, NOSSD);
- btrfs_clear_and_info(info, SSD,
- "not using ssd optimizations");
- /* Fallthrough */
- case Opt_nossd_spread:
- btrfs_clear_and_info(info, SSD_SPREAD,
- "not using spread ssd allocation scheme");
- break;
- case Opt_barrier:
- btrfs_clear_and_info(info, NOBARRIER,
- "turning on barriers");
- break;
- case Opt_nobarrier:
- btrfs_set_and_info(info, NOBARRIER,
- "turning off barriers");
- break;
- case Opt_thread_pool:
- ret = match_int(&args[0], &intarg);
- if (ret) {
- goto out;
- } else if (intarg == 0) {
- ret = -EINVAL;
- goto out;
- }
- info->thread_pool_size = intarg;
- break;
- case Opt_max_inline:
- num = match_strdup(&args[0]);
- if (num) {
- info->max_inline = memparse(num, NULL);
- kfree(num);
-
- if (info->max_inline) {
- info->max_inline = min_t(u64,
- info->max_inline,
- info->sectorsize);
- }
- btrfs_info(info, "max_inline at %llu",
- info->max_inline);
- } else {
- ret = -ENOMEM;
- goto out;
- }
- break;
- case Opt_alloc_start:
- btrfs_info(info,
- "option alloc_start is obsolete, ignored");
- break;
- case Opt_acl:
-#ifdef CONFIG_BTRFS_FS_POSIX_ACL
- info->sb->s_flags |= SB_POSIXACL;
- break;
-#else
- btrfs_err(info, "support for ACL not compiled in!");
- ret = -EINVAL;
- goto out;
-#endif
- case Opt_noacl:
- info->sb->s_flags &= ~SB_POSIXACL;
- break;
- case Opt_notreelog:
- btrfs_set_and_info(info, NOTREELOG,
- "disabling tree log");
- break;
- case Opt_treelog:
- btrfs_clear_and_info(info, NOTREELOG,
- "enabling tree log");
- break;
- case Opt_norecovery:
- case Opt_nologreplay:
- btrfs_set_and_info(info, NOLOGREPLAY,
- "disabling log replay at mount time");
- break;
- case Opt_flushoncommit:
- btrfs_set_and_info(info, FLUSHONCOMMIT,
- "turning on flush-on-commit");
- break;
- case Opt_noflushoncommit:
- btrfs_clear_and_info(info, FLUSHONCOMMIT,
- "turning off flush-on-commit");
- break;
- case Opt_ratio:
- ret = match_int(&args[0], &intarg);
- if (ret)
- goto out;
- info->metadata_ratio = intarg;
- btrfs_info(info, "metadata ratio %u",
- info->metadata_ratio);
- break;
- case Opt_discard:
- btrfs_set_and_info(info, DISCARD,
- "turning on discard");
- break;
- case Opt_nodiscard:
- btrfs_clear_and_info(info, DISCARD,
- "turning off discard");
- break;
- case Opt_space_cache:
- case Opt_space_cache_version:
- if (token == Opt_space_cache ||
- strcmp(args[0].from, "v1") == 0) {
- btrfs_clear_opt(info->mount_opt,
- FREE_SPACE_TREE);
- btrfs_set_and_info(info, SPACE_CACHE,
- "enabling disk space caching");
- } else if (strcmp(args[0].from, "v2") == 0) {
- btrfs_clear_opt(info->mount_opt,
- SPACE_CACHE);
- btrfs_set_and_info(info, FREE_SPACE_TREE,
- "enabling free space tree");
- } else {
- ret = -EINVAL;
- goto out;
- }
- break;
- case Opt_rescan_uuid_tree:
- btrfs_set_opt(info->mount_opt, RESCAN_UUID_TREE);
- break;
- case Opt_no_space_cache:
- if (btrfs_test_opt(info, SPACE_CACHE)) {
- btrfs_clear_and_info(info, SPACE_CACHE,
- "disabling disk space caching");
- }
- if (btrfs_test_opt(info, FREE_SPACE_TREE)) {
- btrfs_clear_and_info(info, FREE_SPACE_TREE,
- "disabling free space tree");
- }
- break;
- case Opt_inode_cache:
- btrfs_set_pending_and_info(info, INODE_MAP_CACHE,
- "enabling inode map caching");
- break;
- case Opt_noinode_cache:
- btrfs_clear_pending_and_info(info, INODE_MAP_CACHE,
- "disabling inode map caching");
- break;
- case Opt_clear_cache:
- btrfs_set_and_info(info, CLEAR_CACHE,
- "force clearing of disk cache");
- break;
- case Opt_user_subvol_rm_allowed:
- btrfs_set_opt(info->mount_opt, USER_SUBVOL_RM_ALLOWED);
- break;
- case Opt_enospc_debug:
- btrfs_set_opt(info->mount_opt, ENOSPC_DEBUG);
- break;
- case Opt_noenospc_debug:
- btrfs_clear_opt(info->mount_opt, ENOSPC_DEBUG);
- break;
- case Opt_defrag:
- btrfs_set_and_info(info, AUTO_DEFRAG,
- "enabling auto defrag");
- break;
- case Opt_nodefrag:
- btrfs_clear_and_info(info, AUTO_DEFRAG,
- "disabling auto defrag");
- break;
- case Opt_recovery:
- btrfs_warn(info,
- "'recovery' is deprecated, use 'usebackuproot' instead");
- /* fall through */
- case Opt_usebackuproot:
- btrfs_info(info,
- "trying to use backup root at mount time");
- btrfs_set_opt(info->mount_opt, USEBACKUPROOT);
- break;
- case Opt_skip_balance:
- btrfs_set_opt(info->mount_opt, SKIP_BALANCE);
- break;
-#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
- case Opt_check_integrity_including_extent_data:
- btrfs_info(info,
- "enabling check integrity including extent data");
- btrfs_set_opt(info->mount_opt,
- CHECK_INTEGRITY_INCLUDING_EXTENT_DATA);
- btrfs_set_opt(info->mount_opt, CHECK_INTEGRITY);
- break;
- case Opt_check_integrity:
- btrfs_info(info, "enabling check integrity");
- btrfs_set_opt(info->mount_opt, CHECK_INTEGRITY);
- break;
- case Opt_check_integrity_print_mask:
- ret = match_int(&args[0], &intarg);
- if (ret)
- goto out;
- info->check_integrity_print_mask = intarg;
- btrfs_info(info, "check_integrity_print_mask 0x%x",
- info->check_integrity_print_mask);
- break;
-#else
- case Opt_check_integrity_including_extent_data:
- case Opt_check_integrity:
- case Opt_check_integrity_print_mask:
- btrfs_err(info,
- "support for check_integrity* not compiled in!");
- ret = -EINVAL;
- goto out;
-#endif
- case Opt_fatal_errors:
- if (strcmp(args[0].from, "panic") == 0)
- btrfs_set_opt(info->mount_opt,
- PANIC_ON_FATAL_ERROR);
- else if (strcmp(args[0].from, "bug") == 0)
- btrfs_clear_opt(info->mount_opt,
- PANIC_ON_FATAL_ERROR);
- else {
- ret = -EINVAL;
- goto out;
- }
- break;
- case Opt_commit_interval:
- intarg = 0;
- ret = match_int(&args[0], &intarg);
- if (ret)
- goto out;
- if (intarg == 0) {
- btrfs_info(info,
- "using default commit interval %us",
- BTRFS_DEFAULT_COMMIT_INTERVAL);
- intarg = BTRFS_DEFAULT_COMMIT_INTERVAL;
- } else if (intarg > 300) {
- btrfs_warn(info, "excessive commit interval %d",
- intarg);
- }
- info->commit_interval = intarg;
- break;
-#ifdef CONFIG_BTRFS_DEBUG
- case Opt_fragment_all:
- btrfs_info(info, "fragmenting all space");
- btrfs_set_opt(info->mount_opt, FRAGMENT_DATA);
- btrfs_set_opt(info->mount_opt, FRAGMENT_METADATA);
- break;
- case Opt_fragment_metadata:
- btrfs_info(info, "fragmenting metadata");
- btrfs_set_opt(info->mount_opt,
- FRAGMENT_METADATA);
- break;
- case Opt_fragment_data:
- btrfs_info(info, "fragmenting data");
- btrfs_set_opt(info->mount_opt, FRAGMENT_DATA);
- break;
-#endif
-#ifdef CONFIG_BTRFS_FS_REF_VERIFY
- case Opt_ref_verify:
- btrfs_info(info, "doing ref verification");
- btrfs_set_opt(info->mount_opt, REF_VERIFY);
- break;
-#endif
- case Opt_err:
- btrfs_info(info, "unrecognized mount option '%s'", p);
- ret = -EINVAL;
- goto out;
- default:
- break;
- }
- }
-check:
- /*
- * Extra check for current option against current flag
- */
- if (btrfs_test_opt(info, NOLOGREPLAY) && !(new_flags & SB_RDONLY)) {
- btrfs_err(info,
- "nologreplay must be used with ro mount option");
- ret = -EINVAL;
- }
-out:
- if (btrfs_fs_compat_ro(info, FREE_SPACE_TREE) &&
- !btrfs_test_opt(info, FREE_SPACE_TREE) &&
- !btrfs_test_opt(info, CLEAR_CACHE)) {
- btrfs_err(info, "cannot disable free space tree");
- ret = -EINVAL;
-
- }
- if (!ret && btrfs_test_opt(info, SPACE_CACHE))
- btrfs_info(info, "disk space caching is enabled");
- if (!ret && btrfs_test_opt(info, FREE_SPACE_TREE))
- btrfs_info(info, "using free space tree");
- return ret;
-}
-
-/*
- * Parse mount options that are required early in the mount process.
- *
- * All other options will be parsed on much later in the mount process and
- * only when we need to allocate a new super block.
- */
-static int btrfs_parse_device_options(const char *options, fmode_t flags,
- void *holder)
-{
- substring_t args[MAX_OPT_ARGS];
- char *device_name, *opts, *orig, *p;
- struct btrfs_device *device = NULL;
- int error = 0;
-
- lockdep_assert_held(&uuid_mutex);
-
- if (!options)
- return 0;
-
- /*
- * strsep changes the string, duplicate it because btrfs_parse_options
- * gets called later
- */
- opts = kstrdup(options, GFP_KERNEL);
- if (!opts)
- return -ENOMEM;
- orig = opts;
-
- while ((p = strsep(&opts, ",")) != NULL) {
- int token;
-
- if (!*p)
- continue;
-
- token = match_token(p, tokens, args);
- if (token == Opt_device) {
- device_name = match_strdup(&args[0]);
- if (!device_name) {
- error = -ENOMEM;
- goto out;
- }
- device = btrfs_scan_one_device(device_name, flags,
- holder);
- kfree(device_name);
- if (IS_ERR(device)) {
- error = PTR_ERR(device);
- goto out;
- }
- }
- }
-
-out:
- kfree(orig);
- return error;
-}
-
-/*
- * Parse mount options that are related to subvolume id
- *
- * The value is later passed to mount_subvol()
- */
-static int btrfs_parse_subvol_options(const char *options, char **subvol_name,
- u64 *subvol_objectid)
-{
- substring_t args[MAX_OPT_ARGS];
- char *opts, *orig, *p;
- int error = 0;
- u64 subvolid;
-
- if (!options)
- return 0;
-
- /*
- * strsep changes the string, duplicate it because
- * btrfs_parse_device_options gets called later
- */
- opts = kstrdup(options, GFP_KERNEL);
- if (!opts)
- return -ENOMEM;
- orig = opts;
-
- while ((p = strsep(&opts, ",")) != NULL) {
- int token;
- if (!*p)
- continue;
-
- token = match_token(p, tokens, args);
- switch (token) {
- case Opt_subvol:
- kfree(*subvol_name);
- *subvol_name = match_strdup(&args[0]);
- if (!*subvol_name) {
- error = -ENOMEM;
- goto out;
- }
- break;
- case Opt_subvolid:
- error = match_u64(&args[0], &subvolid);
- if (error)
- goto out;
-
- /* we want the original fs_tree */
- if (subvolid == 0)
- subvolid = BTRFS_FS_TREE_OBJECTID;
-
- *subvol_objectid = subvolid;
- break;
- case Opt_subvolrootid:
- pr_warn("BTRFS: 'subvolrootid' mount option is deprecated and has no effect\n");
- break;
- default:
- break;
- }
- }
-
-out:
- kfree(orig);
- return error;
-}
-
static char *get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
u64 subvol_objectid)
{
@@ -1274,99 +569,6 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
return btrfs_commit_transaction(trans);
}
-static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
-{
- struct btrfs_fs_info *info = btrfs_sb(dentry->d_sb);
- const char *compress_type;
-
- if (btrfs_test_opt(info, DEGRADED))
- seq_puts(seq, ",degraded");
- if (btrfs_test_opt(info, NODATASUM))
- seq_puts(seq, ",nodatasum");
- if (btrfs_test_opt(info, NODATACOW))
- seq_puts(seq, ",nodatacow");
- if (btrfs_test_opt(info, NOBARRIER))
- seq_puts(seq, ",nobarrier");
- if (info->max_inline != BTRFS_DEFAULT_MAX_INLINE)
- seq_printf(seq, ",max_inline=%llu", info->max_inline);
- if (info->thread_pool_size != min_t(unsigned long,
- num_online_cpus() + 2, 8))
- seq_printf(seq, ",thread_pool=%u", info->thread_pool_size);
- if (btrfs_test_opt(info, COMPRESS)) {
- compress_type = btrfs_compress_type2str(info->compress_type);
- if (btrfs_test_opt(info, FORCE_COMPRESS))
- seq_printf(seq, ",compress-force=%s", compress_type);
- else
- seq_printf(seq, ",compress=%s", compress_type);
- if (info->compress_level)
- seq_printf(seq, ":%d", info->compress_level);
- }
- if (btrfs_test_opt(info, NOSSD))
- seq_puts(seq, ",nossd");
- if (btrfs_test_opt(info, SSD_SPREAD))
- seq_puts(seq, ",ssd_spread");
- else if (btrfs_test_opt(info, SSD))
- seq_puts(seq, ",ssd");
- if (btrfs_test_opt(info, NOTREELOG))
- seq_puts(seq, ",notreelog");
- if (btrfs_test_opt(info, NOLOGREPLAY))
- seq_puts(seq, ",nologreplay");
- if (btrfs_test_opt(info, FLUSHONCOMMIT))
- seq_puts(seq, ",flushoncommit");
- if (btrfs_test_opt(info, DISCARD))
- seq_puts(seq, ",discard");
- if (!(info->sb->s_flags & SB_POSIXACL))
- seq_puts(seq, ",noacl");
- if (btrfs_test_opt(info, SPACE_CACHE))
- seq_puts(seq, ",space_cache");
- else if (btrfs_test_opt(info, FREE_SPACE_TREE))
- seq_puts(seq, ",space_cache=v2");
- else
- seq_puts(seq, ",nospace_cache");
- if (btrfs_test_opt(info, RESCAN_UUID_TREE))
- seq_puts(seq, ",rescan_uuid_tree");
- if (btrfs_test_opt(info, CLEAR_CACHE))
- seq_puts(seq, ",clear_cache");
- if (btrfs_test_opt(info, USER_SUBVOL_RM_ALLOWED))
- seq_puts(seq, ",user_subvol_rm_allowed");
- if (btrfs_test_opt(info, ENOSPC_DEBUG))
- seq_puts(seq, ",enospc_debug");
- if (btrfs_test_opt(info, AUTO_DEFRAG))
- seq_puts(seq, ",autodefrag");
- if (btrfs_test_opt(info, INODE_MAP_CACHE))
- seq_puts(seq, ",inode_cache");
- if (btrfs_test_opt(info, SKIP_BALANCE))
- seq_puts(seq, ",skip_balance");
-#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
- if (btrfs_test_opt(info, CHECK_INTEGRITY_INCLUDING_EXTENT_DATA))
- seq_puts(seq, ",check_int_data");
- else if (btrfs_test_opt(info, CHECK_INTEGRITY))
- seq_puts(seq, ",check_int");
- if (info->check_integrity_print_mask)
- seq_printf(seq, ",check_int_print_mask=%d",
- info->check_integrity_print_mask);
-#endif
- if (info->metadata_ratio)
- seq_printf(seq, ",metadata_ratio=%u", info->metadata_ratio);
- if (btrfs_test_opt(info, PANIC_ON_FATAL_ERROR))
- seq_puts(seq, ",fatal_errors=panic");
- if (info->commit_interval != BTRFS_DEFAULT_COMMIT_INTERVAL)
- seq_printf(seq, ",commit=%u", info->commit_interval);
-#ifdef CONFIG_BTRFS_DEBUG
- if (btrfs_test_opt(info, FRAGMENT_DATA))
- seq_puts(seq, ",fragment=data");
- if (btrfs_test_opt(info, FRAGMENT_METADATA))
- seq_puts(seq, ",fragment=metadata");
-#endif
- if (btrfs_test_opt(info, REF_VERIFY))
- seq_puts(seq, ",ref_verify");
- seq_printf(seq, ",subvolid=%llu",
- BTRFS_I(d_inode(dentry))->root->root_key.objectid);
- seq_puts(seq, ",subvol=");
- seq_dentry(seq, dentry, " \t\n\\");
- return 0;
-}
-
static int btrfs_test_super(struct super_block *s, void *data)
{
struct btrfs_fs_info *p = data;
