From: Ian Kent Date: Mon, 4 Nov 2019 21:58:48 +0000 (-0800) Subject: xfs: move xfs_fc_parse_param() above xfs_fc_get_tree() X-Git-Tag: Ubuntu-5.10.0-12.13~4000^2~103 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=8757c38f2cf6e5ac474aabd7deea14729918ff7c;p=mirror_ubuntu-hirsute-kernel.git xfs: move xfs_fc_parse_param() above xfs_fc_get_tree() Grouping the options parsing and mount handling functions above the struct fs_context_operations but below the struct super_operations should improve (some) the grouping of the super operations while also improving the grouping of the options parsing and mount handling code. Lastly move xfs_fc_parse_param() and related functions down to above xfs_fc_get_tree() and it's related functions. But leave the options enum, struct fs_parameter_spec and the struct fs_parameter_description declarations at the top since that's the logical place for them. This is a straight code move, there aren't any functional changes. Signed-off-by: Ian Kent Reviewed-by: Darrick J. Wong Reviewed-by: Christoph Hellwig Signed-off-by: Darrick J. Wong --- diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 33a6eea8ae27..d42c2317db66 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -111,264 +111,6 @@ static const struct fs_parameter_description xfs_fs_parameters = { .specs = xfs_param_specs, }; -static int -suffix_kstrtoint( - const char *s, - unsigned int base, - int *res) -{ - int last, shift_left_factor = 0, _res; - char *value; - int ret = 0; - - value = kstrdup(s, GFP_KERNEL); - if (!value) - return -ENOMEM; - - last = strlen(value) - 1; - if (value[last] == 'K' || value[last] == 'k') { - shift_left_factor = 10; - value[last] = '\0'; - } - if (value[last] == 'M' || value[last] == 'm') { - shift_left_factor = 20; - value[last] = '\0'; - } - if (value[last] == 'G' || value[last] == 'g') { - shift_left_factor = 30; - value[last] = '\0'; - } - - if (kstrtoint(value, base, &_res)) - ret = -EINVAL; - kfree(value); - *res = _res << shift_left_factor; - return ret; -} - -/* - * Set mount state from a mount option. - * - * NOTE: mp->m_super is NULL here! - */ -static int -xfs_fc_parse_param( - 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; - - opt = fs_parse(fc, &xfs_fs_parameters, param, &result); - if (opt < 0) - return opt; - - switch (opt) { - case Opt_logbufs: - mp->m_logbufs = result.uint_32; - return 0; - case Opt_logbsize: - if (suffix_kstrtoint(param->string, 10, &mp->m_logbsize)) - return -EINVAL; - return 0; - case Opt_logdev: - kfree(mp->m_logname); - 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 = kstrdup(param->string, GFP_KERNEL); - if (!mp->m_rtname) - return -ENOMEM; - return 0; - case Opt_allocsize: - if (suffix_kstrtoint(param->string, 10, &size)) - return -EINVAL; - mp->m_allocsize_log = ffs(size) - 1; - mp->m_flags |= XFS_MOUNT_ALLOCSIZE; - return 0; - case Opt_grpid: - case Opt_bsdgroups: - mp->m_flags |= XFS_MOUNT_GRPID; - return 0; - case Opt_nogrpid: - case Opt_sysvgroups: - mp->m_flags &= ~XFS_MOUNT_GRPID; - return 0; - case Opt_wsync: - mp->m_flags |= XFS_MOUNT_WSYNC; - return 0; - case Opt_norecovery: - mp->m_flags |= XFS_MOUNT_NORECOVERY; - return 0; - case Opt_noalign: - mp->m_flags |= XFS_MOUNT_NOALIGN; - return 0; - case Opt_swalloc: - mp->m_flags |= XFS_MOUNT_SWALLOC; - return 0; - case Opt_sunit: - mp->m_dalign = result.uint_32; - return 0; - case Opt_swidth: - mp->m_swidth = result.uint_32; - return 0; - case Opt_inode32: - mp->m_flags |= XFS_MOUNT_SMALL_INUMS; - return 0; - case Opt_inode64: - mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS; - return 0; - case Opt_nouuid: - mp->m_flags |= XFS_MOUNT_NOUUID; - return 0; - case Opt_ikeep: - mp->m_flags |= XFS_MOUNT_IKEEP; - return 0; - case Opt_noikeep: - mp->m_flags &= ~XFS_MOUNT_IKEEP; - return 0; - case Opt_largeio: - mp->m_flags |= XFS_MOUNT_LARGEIO; - return 0; - case Opt_nolargeio: - mp->m_flags &= ~XFS_MOUNT_LARGEIO; - return 0; - case Opt_attr2: - mp->m_flags |= XFS_MOUNT_ATTR2; - return 0; - case Opt_noattr2: - mp->m_flags &= ~XFS_MOUNT_ATTR2; - mp->m_flags |= XFS_MOUNT_NOATTR2; - return 0; - case Opt_filestreams: - mp->m_flags |= XFS_MOUNT_FILESTREAMS; - return 0; - case Opt_noquota: - mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT; - mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD; - mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE; - return 0; - case Opt_quota: - case Opt_uquota: - case Opt_usrquota: - mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE | - XFS_UQUOTA_ENFD); - return 0; - case Opt_qnoenforce: - case Opt_uqnoenforce: - mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE); - mp->m_qflags &= ~XFS_UQUOTA_ENFD; - return 0; - case Opt_pquota: - case Opt_prjquota: - mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE | - XFS_PQUOTA_ENFD); - return 0; - case Opt_pqnoenforce: - mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE); - mp->m_qflags &= ~XFS_PQUOTA_ENFD; - return 0; - case Opt_gquota: - case Opt_grpquota: - mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE | - XFS_GQUOTA_ENFD); - return 0; - case Opt_gqnoenforce: - mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE); - mp->m_qflags &= ~XFS_GQUOTA_ENFD; - return 0; - case Opt_discard: - mp->m_flags |= XFS_MOUNT_DISCARD; - return 0; - case Opt_nodiscard: - mp->m_flags &= ~XFS_MOUNT_DISCARD; - return 0; -#ifdef CONFIG_FS_DAX - case Opt_dax: - mp->m_flags |= XFS_MOUNT_DAX; - return 0; -#endif - default: - xfs_warn(mp, "unknown mount option [%s].", param->key); - return -EINVAL; - } - - return 0; -} - -static int -xfs_fc_validate_params( - struct xfs_mount *mp) -{ - /* - * no recovery flag requires a read-only mount - */ - if ((mp->m_flags & XFS_MOUNT_NORECOVERY) && - !(mp->m_flags & XFS_MOUNT_RDONLY)) { - xfs_warn(mp, "no-recovery mounts must be read-only."); - return -EINVAL; - } - - if ((mp->m_flags & XFS_MOUNT_NOALIGN) && - (mp->m_dalign || mp->m_swidth)) { - xfs_warn(mp, - "sunit and swidth options incompatible with the noalign option"); - return -EINVAL; - } - - if (!IS_ENABLED(CONFIG_XFS_QUOTA) && mp->m_qflags != 0) { - xfs_warn(mp, "quota support not available in this kernel."); - return -EINVAL; - } - - if ((mp->m_dalign && !mp->m_swidth) || - (!mp->m_dalign && mp->m_swidth)) { - xfs_warn(mp, "sunit and swidth must be specified together"); - return -EINVAL; - } - - if (mp->m_dalign && (mp->m_swidth % mp->m_dalign != 0)) { - xfs_warn(mp, - "stripe width (%d) must be a multiple of the stripe unit (%d)", - mp->m_swidth, mp->m_dalign); - return -EINVAL; - } - - if (mp->m_logbufs != -1 && - mp->m_logbufs != 0 && - (mp->m_logbufs < XLOG_MIN_ICLOGS || - mp->m_logbufs > XLOG_MAX_ICLOGS)) { - xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]", - mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS); - return -EINVAL; - } - if (mp->m_logbsize != -1 && - mp->m_logbsize != 0 && - (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE || - mp->m_logbsize > XLOG_MAX_RECORD_BSIZE || - !is_power_of_2(mp->m_logbsize))) { - xfs_warn(mp, - "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]", - mp->m_logbsize); - return -EINVAL; - } - - if ((mp->m_flags & XFS_MOUNT_ALLOCSIZE) && - (mp->m_allocsize_log > XFS_MAX_IO_LOG || - mp->m_allocsize_log < XFS_MIN_IO_LOG)) { - xfs_warn(mp, "invalid log iosize: %d [not %d-%d]", - mp->m_allocsize_log, XFS_MIN_IO_LOG, XFS_MAX_IO_LOG); - return -EINVAL; - } - - return 0; -} - struct proc_xfs_info { uint64_t flag; char *str; @@ -1102,285 +844,544 @@ xfs_restore_resvblks(struct xfs_mount *mp) xfs_reserve_blocks(mp, &resblks, NULL); } -/* - * Trigger writeback of all the dirty metadata in the file system. - * - * This ensures that the metadata is written to their location on disk rather - * than just existing in transactions in the log. This means after a quiesce - * there is no log replay required to write the inodes to disk - this is the - * primary difference between a sync and a quiesce. - * - * Note: xfs_log_quiesce() stops background log work - the callers must ensure - * it is started again when appropriate. - */ -void -xfs_quiesce_attr( - struct xfs_mount *mp) +/* + * Trigger writeback of all the dirty metadata in the file system. + * + * This ensures that the metadata is written to their location on disk rather + * than just existing in transactions in the log. This means after a quiesce + * there is no log replay required to write the inodes to disk - this is the + * primary difference between a sync and a quiesce. + * + * Note: xfs_log_quiesce() stops background log work - the callers must ensure + * it is started again when appropriate. + */ +void +xfs_quiesce_attr( + struct xfs_mount *mp) +{ + int error = 0; + + /* wait for all modifications to complete */ + while (atomic_read(&mp->m_active_trans) > 0) + delay(100); + + /* force the log to unpin objects from the now complete transactions */ + xfs_log_force(mp, XFS_LOG_SYNC); + + /* reclaim inodes to do any IO before the freeze completes */ + xfs_reclaim_inodes(mp, 0); + xfs_reclaim_inodes(mp, SYNC_WAIT); + + /* Push the superblock and write an unmount record */ + error = xfs_log_sbcount(mp); + if (error) + xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. " + "Frozen image may not be consistent."); + /* + * Just warn here till VFS can correctly support + * read-only remount without racing. + */ + WARN_ON(atomic_read(&mp->m_active_trans) != 0); + + xfs_log_quiesce(mp); +} + +/* + * Second stage of a freeze. The data is already frozen so we only + * need to take care of the metadata. Once that's done sync the superblock + * to the log to dirty it in case of a crash while frozen. This ensures that we + * will recover the unlinked inode lists on the next mount. + */ +STATIC int +xfs_fs_freeze( + struct super_block *sb) +{ + struct xfs_mount *mp = XFS_M(sb); + + xfs_stop_block_reaping(mp); + xfs_save_resvblks(mp); + xfs_quiesce_attr(mp); + return xfs_sync_sb(mp, true); +} + +STATIC int +xfs_fs_unfreeze( + struct super_block *sb) +{ + struct xfs_mount *mp = XFS_M(sb); + + xfs_restore_resvblks(mp); + xfs_log_work_queue(mp); + xfs_start_block_reaping(mp); + return 0; +} + +/* + * This function fills in xfs_mount_t fields based on mount args. + * Note: the superblock _has_ now been read in. + */ +STATIC int +xfs_finish_flags( + struct xfs_mount *mp) +{ + int ronly = (mp->m_flags & XFS_MOUNT_RDONLY); + + /* Fail a mount where the logbuf is smaller than the log stripe */ + if (xfs_sb_version_haslogv2(&mp->m_sb)) { + if (mp->m_logbsize <= 0 && + mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) { + mp->m_logbsize = mp->m_sb.sb_logsunit; + } else if (mp->m_logbsize > 0 && + mp->m_logbsize < mp->m_sb.sb_logsunit) { + xfs_warn(mp, + "logbuf size must be greater than or equal to log stripe size"); + return -EINVAL; + } + } else { + /* Fail a mount if the logbuf is larger than 32K */ + if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) { + xfs_warn(mp, + "logbuf size for version 1 logs must be 16K or 32K"); + return -EINVAL; + } + } + + /* + * V5 filesystems always use attr2 format for attributes. + */ + if (xfs_sb_version_hascrc(&mp->m_sb) && + (mp->m_flags & XFS_MOUNT_NOATTR2)) { + xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. " + "attr2 is always enabled for V5 filesystems."); + return -EINVAL; + } + + /* + * mkfs'ed attr2 will turn on attr2 mount unless explicitly + * told by noattr2 to turn it off + */ + if (xfs_sb_version_hasattr2(&mp->m_sb) && + !(mp->m_flags & XFS_MOUNT_NOATTR2)) + mp->m_flags |= XFS_MOUNT_ATTR2; + + /* + * prohibit r/w mounts of read-only filesystems + */ + if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) { + xfs_warn(mp, + "cannot mount a read-only filesystem as read-write"); + return -EROFS; + } + + if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) && + (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) && + !xfs_sb_version_has_pquotino(&mp->m_sb)) { + xfs_warn(mp, + "Super block does not support project and group quota together"); + return -EINVAL; + } + + return 0; +} + +static int +xfs_init_percpu_counters( + struct xfs_mount *mp) +{ + int error; + + error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL); + if (error) + return -ENOMEM; + + error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL); + if (error) + goto free_icount; + + error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL); + if (error) + goto free_ifree; + + error = percpu_counter_init(&mp->m_delalloc_blks, 0, GFP_KERNEL); + if (error) + goto free_fdblocks; + + return 0; + +free_fdblocks: + percpu_counter_destroy(&mp->m_fdblocks); +free_ifree: + percpu_counter_destroy(&mp->m_ifree); +free_icount: + percpu_counter_destroy(&mp->m_icount); + return -ENOMEM; +} + +void +xfs_reinit_percpu_counters( + struct xfs_mount *mp) +{ + percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount); + percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree); + percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks); +} + +static void +xfs_destroy_percpu_counters( + struct xfs_mount *mp) +{ + percpu_counter_destroy(&mp->m_icount); + percpu_counter_destroy(&mp->m_ifree); + percpu_counter_destroy(&mp->m_fdblocks); + ASSERT(XFS_FORCED_SHUTDOWN(mp) || + percpu_counter_sum(&mp->m_delalloc_blks) == 0); + percpu_counter_destroy(&mp->m_delalloc_blks); +} + +static void +xfs_fs_put_super( + struct super_block *sb) +{ + struct xfs_mount *mp = XFS_M(sb); + + /* if ->fill_super failed, we have no mount to tear down */ + if (!sb->s_fs_info) + return; + + xfs_notice(mp, "Unmounting Filesystem"); + xfs_filestream_unmount(mp); + xfs_unmountfs(mp); + + xfs_freesb(mp); + free_percpu(mp->m_stats.xs_stats); + xfs_destroy_percpu_counters(mp); + xfs_destroy_mount_workqueues(mp); + xfs_close_devices(mp); + + sb->s_fs_info = NULL; + xfs_mount_free(mp); +} + +static long +xfs_fs_nr_cached_objects( + struct super_block *sb, + struct shrink_control *sc) +{ + /* Paranoia: catch incorrect calls during mount setup or teardown */ + if (WARN_ON_ONCE(!sb->s_fs_info)) + return 0; + return xfs_reclaim_inodes_count(XFS_M(sb)); +} + +static long +xfs_fs_free_cached_objects( + struct super_block *sb, + struct shrink_control *sc) { - int error = 0; + return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan); +} - /* wait for all modifications to complete */ - while (atomic_read(&mp->m_active_trans) > 0) - delay(100); +static const struct super_operations xfs_super_operations = { + .alloc_inode = xfs_fs_alloc_inode, + .destroy_inode = xfs_fs_destroy_inode, + .dirty_inode = xfs_fs_dirty_inode, + .drop_inode = xfs_fs_drop_inode, + .put_super = xfs_fs_put_super, + .sync_fs = xfs_fs_sync_fs, + .freeze_fs = xfs_fs_freeze, + .unfreeze_fs = xfs_fs_unfreeze, + .statfs = xfs_fs_statfs, + .show_options = xfs_fs_show_options, + .nr_cached_objects = xfs_fs_nr_cached_objects, + .free_cached_objects = xfs_fs_free_cached_objects, +}; - /* force the log to unpin objects from the now complete transactions */ - xfs_log_force(mp, XFS_LOG_SYNC); +static struct xfs_mount * +xfs_mount_alloc(void) +{ + struct xfs_mount *mp; - /* reclaim inodes to do any IO before the freeze completes */ - xfs_reclaim_inodes(mp, 0); - xfs_reclaim_inodes(mp, SYNC_WAIT); + mp = kmem_alloc(sizeof(struct xfs_mount), KM_ZERO); + if (!mp) + return NULL; - /* Push the superblock and write an unmount record */ - error = xfs_log_sbcount(mp); - if (error) - xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. " - "Frozen image may not be consistent."); + spin_lock_init(&mp->m_sb_lock); + spin_lock_init(&mp->m_agirotor_lock); + INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC); + spin_lock_init(&mp->m_perag_lock); + mutex_init(&mp->m_growlock); + atomic_set(&mp->m_active_trans, 0); + INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); + INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker); + INIT_DELAYED_WORK(&mp->m_cowblocks_work, xfs_cowblocks_worker); + mp->m_kobj.kobject.kset = xfs_kset; /* - * Just warn here till VFS can correctly support - * read-only remount without racing. + * We don't create the finobt per-ag space reservation until after log + * recovery, so we must set this to true so that an ifree transaction + * started during log recovery will not depend on space reservations + * for finobt expansion. */ - WARN_ON(atomic_read(&mp->m_active_trans) != 0); + mp->m_finobt_nores = true; + return mp; +} - xfs_log_quiesce(mp); +static int +suffix_kstrtoint( + const char *s, + unsigned int base, + int *res) +{ + int last, shift_left_factor = 0, _res; + char *value; + int ret = 0; + + value = kstrdup(s, GFP_KERNEL); + if (!value) + return -ENOMEM; + + last = strlen(value) - 1; + if (value[last] == 'K' || value[last] == 'k') { + shift_left_factor = 10; + value[last] = '\0'; + } + if (value[last] == 'M' || value[last] == 'm') { + shift_left_factor = 20; + value[last] = '\0'; + } + if (value[last] == 'G' || value[last] == 'g') { + shift_left_factor = 30; + value[last] = '\0'; + } + + if (kstrtoint(value, base, &_res)) + ret = -EINVAL; + kfree(value); + *res = _res << shift_left_factor; + return ret; } /* - * Second stage of a freeze. The data is already frozen so we only - * need to take care of the metadata. Once that's done sync the superblock - * to the log to dirty it in case of a crash while frozen. This ensures that we - * will recover the unlinked inode lists on the next mount. + * Set mount state from a mount option. + * + * NOTE: mp->m_super is NULL here! */ -STATIC int -xfs_fs_freeze( - struct super_block *sb) +static int +xfs_fc_parse_param( + struct fs_context *fc, + struct fs_parameter *param) { - struct xfs_mount *mp = XFS_M(sb); + struct xfs_mount *mp = fc->s_fs_info; + struct fs_parse_result result; + int size = 0; + int opt; - xfs_stop_block_reaping(mp); - xfs_save_resvblks(mp); - xfs_quiesce_attr(mp); - return xfs_sync_sb(mp, true); -} + opt = fs_parse(fc, &xfs_fs_parameters, param, &result); + if (opt < 0) + return opt; -STATIC int -xfs_fs_unfreeze( - struct super_block *sb) -{ - struct xfs_mount *mp = XFS_M(sb); + switch (opt) { + case Opt_logbufs: + mp->m_logbufs = result.uint_32; + return 0; + case Opt_logbsize: + if (suffix_kstrtoint(param->string, 10, &mp->m_logbsize)) + return -EINVAL; + return 0; + case Opt_logdev: + kfree(mp->m_logname); + 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 = kstrdup(param->string, GFP_KERNEL); + if (!mp->m_rtname) + return -ENOMEM; + return 0; + case Opt_allocsize: + if (suffix_kstrtoint(param->string, 10, &size)) + return -EINVAL; + mp->m_allocsize_log = ffs(size) - 1; + mp->m_flags |= XFS_MOUNT_ALLOCSIZE; + return 0; + case Opt_grpid: + case Opt_bsdgroups: + mp->m_flags |= XFS_MOUNT_GRPID; + return 0; + case Opt_nogrpid: + case Opt_sysvgroups: + mp->m_flags &= ~XFS_MOUNT_GRPID; + return 0; + case Opt_wsync: + mp->m_flags |= XFS_MOUNT_WSYNC; + return 0; + case Opt_norecovery: + mp->m_flags |= XFS_MOUNT_NORECOVERY; + return 0; + case Opt_noalign: + mp->m_flags |= XFS_MOUNT_NOALIGN; + return 0; + case Opt_swalloc: + mp->m_flags |= XFS_MOUNT_SWALLOC; + return 0; + case Opt_sunit: + mp->m_dalign = result.uint_32; + return 0; + case Opt_swidth: + mp->m_swidth = result.uint_32; + return 0; + case Opt_inode32: + mp->m_flags |= XFS_MOUNT_SMALL_INUMS; + return 0; + case Opt_inode64: + mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS; + return 0; + case Opt_nouuid: + mp->m_flags |= XFS_MOUNT_NOUUID; + return 0; + case Opt_ikeep: + mp->m_flags |= XFS_MOUNT_IKEEP; + return 0; + case Opt_noikeep: + mp->m_flags &= ~XFS_MOUNT_IKEEP; + return 0; + case Opt_largeio: + mp->m_flags |= XFS_MOUNT_LARGEIO; + return 0; + case Opt_nolargeio: + mp->m_flags &= ~XFS_MOUNT_LARGEIO; + return 0; + case Opt_attr2: + mp->m_flags |= XFS_MOUNT_ATTR2; + return 0; + case Opt_noattr2: + mp->m_flags &= ~XFS_MOUNT_ATTR2; + mp->m_flags |= XFS_MOUNT_NOATTR2; + return 0; + case Opt_filestreams: + mp->m_flags |= XFS_MOUNT_FILESTREAMS; + return 0; + case Opt_noquota: + mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT; + mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD; + mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE; + return 0; + case Opt_quota: + case Opt_uquota: + case Opt_usrquota: + mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE | + XFS_UQUOTA_ENFD); + return 0; + case Opt_qnoenforce: + case Opt_uqnoenforce: + mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE); + mp->m_qflags &= ~XFS_UQUOTA_ENFD; + return 0; + case Opt_pquota: + case Opt_prjquota: + mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE | + XFS_PQUOTA_ENFD); + return 0; + case Opt_pqnoenforce: + mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE); + mp->m_qflags &= ~XFS_PQUOTA_ENFD; + return 0; + case Opt_gquota: + case Opt_grpquota: + mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE | + XFS_GQUOTA_ENFD); + return 0; + case Opt_gqnoenforce: + mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE); + mp->m_qflags &= ~XFS_GQUOTA_ENFD; + return 0; + case Opt_discard: + mp->m_flags |= XFS_MOUNT_DISCARD; + return 0; + case Opt_nodiscard: + mp->m_flags &= ~XFS_MOUNT_DISCARD; + return 0; +#ifdef CONFIG_FS_DAX + case Opt_dax: + mp->m_flags |= XFS_MOUNT_DAX; + return 0; +#endif + default: + xfs_warn(mp, "unknown mount option [%s].", param->key); + return -EINVAL; + } - xfs_restore_resvblks(mp); - xfs_log_work_queue(mp); - xfs_start_block_reaping(mp); return 0; } -/* - * This function fills in xfs_mount_t fields based on mount args. - * Note: the superblock _has_ now been read in. - */ -STATIC int -xfs_finish_flags( +static int +xfs_fc_validate_params( struct xfs_mount *mp) { - int ronly = (mp->m_flags & XFS_MOUNT_RDONLY); - - /* Fail a mount where the logbuf is smaller than the log stripe */ - if (xfs_sb_version_haslogv2(&mp->m_sb)) { - if (mp->m_logbsize <= 0 && - mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) { - mp->m_logbsize = mp->m_sb.sb_logsunit; - } else if (mp->m_logbsize > 0 && - mp->m_logbsize < mp->m_sb.sb_logsunit) { - xfs_warn(mp, - "logbuf size must be greater than or equal to log stripe size"); - return -EINVAL; - } - } else { - /* Fail a mount if the logbuf is larger than 32K */ - if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) { - xfs_warn(mp, - "logbuf size for version 1 logs must be 16K or 32K"); - return -EINVAL; - } - } - /* - * V5 filesystems always use attr2 format for attributes. + * no recovery flag requires a read-only mount */ - if (xfs_sb_version_hascrc(&mp->m_sb) && - (mp->m_flags & XFS_MOUNT_NOATTR2)) { - xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. " - "attr2 is always enabled for V5 filesystems."); + if ((mp->m_flags & XFS_MOUNT_NORECOVERY) && + !(mp->m_flags & XFS_MOUNT_RDONLY)) { + xfs_warn(mp, "no-recovery mounts must be read-only."); return -EINVAL; } - /* - * mkfs'ed attr2 will turn on attr2 mount unless explicitly - * told by noattr2 to turn it off - */ - if (xfs_sb_version_hasattr2(&mp->m_sb) && - !(mp->m_flags & XFS_MOUNT_NOATTR2)) - mp->m_flags |= XFS_MOUNT_ATTR2; - - /* - * prohibit r/w mounts of read-only filesystems - */ - if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) { + if ((mp->m_flags & XFS_MOUNT_NOALIGN) && + (mp->m_dalign || mp->m_swidth)) { xfs_warn(mp, - "cannot mount a read-only filesystem as read-write"); - return -EROFS; + "sunit and swidth options incompatible with the noalign option"); + return -EINVAL; } - if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) && - (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) && - !xfs_sb_version_has_pquotino(&mp->m_sb)) { - xfs_warn(mp, - "Super block does not support project and group quota together"); + if (!IS_ENABLED(CONFIG_XFS_QUOTA) && mp->m_qflags != 0) { + xfs_warn(mp, "quota support not available in this kernel."); return -EINVAL; } - return 0; -} - -static int -xfs_init_percpu_counters( - struct xfs_mount *mp) -{ - int error; + if ((mp->m_dalign && !mp->m_swidth) || + (!mp->m_dalign && mp->m_swidth)) { + xfs_warn(mp, "sunit and swidth must be specified together"); + return -EINVAL; + } - error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL); - if (error) - return -ENOMEM; + if (mp->m_dalign && (mp->m_swidth % mp->m_dalign != 0)) { + xfs_warn(mp, + "stripe width (%d) must be a multiple of the stripe unit (%d)", + mp->m_swidth, mp->m_dalign); + return -EINVAL; + } - error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL); - if (error) - goto free_icount; + if (mp->m_logbufs != -1 && + mp->m_logbufs != 0 && + (mp->m_logbufs < XLOG_MIN_ICLOGS || + mp->m_logbufs > XLOG_MAX_ICLOGS)) { + xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]", + mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS); + return -EINVAL; + } - error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL); - if (error) - goto free_ifree; + if (mp->m_logbsize != -1 && + mp->m_logbsize != 0 && + (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE || + mp->m_logbsize > XLOG_MAX_RECORD_BSIZE || + !is_power_of_2(mp->m_logbsize))) { + xfs_warn(mp, + "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]", + mp->m_logbsize); + return -EINVAL; + } - error = percpu_counter_init(&mp->m_delalloc_blks, 0, GFP_KERNEL); - if (error) - goto free_fdblocks; + if ((mp->m_flags & XFS_MOUNT_ALLOCSIZE) && + (mp->m_allocsize_log > XFS_MAX_IO_LOG || + mp->m_allocsize_log < XFS_MIN_IO_LOG)) { + xfs_warn(mp, "invalid log iosize: %d [not %d-%d]", + mp->m_allocsize_log, XFS_MIN_IO_LOG, XFS_MAX_IO_LOG); + return -EINVAL; + } return 0; - -free_fdblocks: - percpu_counter_destroy(&mp->m_fdblocks); -free_ifree: - percpu_counter_destroy(&mp->m_ifree); -free_icount: - percpu_counter_destroy(&mp->m_icount); - return -ENOMEM; -} - -void -xfs_reinit_percpu_counters( - struct xfs_mount *mp) -{ - percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount); - percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree); - percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks); -} - -static void -xfs_destroy_percpu_counters( - struct xfs_mount *mp) -{ - percpu_counter_destroy(&mp->m_icount); - percpu_counter_destroy(&mp->m_ifree); - percpu_counter_destroy(&mp->m_fdblocks); - ASSERT(XFS_FORCED_SHUTDOWN(mp) || - percpu_counter_sum(&mp->m_delalloc_blks) == 0); - percpu_counter_destroy(&mp->m_delalloc_blks); -} - -static void -xfs_fs_put_super( - struct super_block *sb) -{ - struct xfs_mount *mp = XFS_M(sb); - - /* if ->fill_super failed, we have no mount to tear down */ - if (!sb->s_fs_info) - return; - - xfs_notice(mp, "Unmounting Filesystem"); - xfs_filestream_unmount(mp); - xfs_unmountfs(mp); - - xfs_freesb(mp); - free_percpu(mp->m_stats.xs_stats); - xfs_destroy_percpu_counters(mp); - xfs_destroy_mount_workqueues(mp); - xfs_close_devices(mp); - - sb->s_fs_info = NULL; - xfs_mount_free(mp); -} - -static long -xfs_fs_nr_cached_objects( - struct super_block *sb, - struct shrink_control *sc) -{ - /* Paranoia: catch incorrect calls during mount setup or teardown */ - if (WARN_ON_ONCE(!sb->s_fs_info)) - return 0; - return xfs_reclaim_inodes_count(XFS_M(sb)); -} - -static long -xfs_fs_free_cached_objects( - struct super_block *sb, - struct shrink_control *sc) -{ - return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan); -} - -static const struct super_operations xfs_super_operations = { - .alloc_inode = xfs_fs_alloc_inode, - .destroy_inode = xfs_fs_destroy_inode, - .dirty_inode = xfs_fs_dirty_inode, - .drop_inode = xfs_fs_drop_inode, - .put_super = xfs_fs_put_super, - .sync_fs = xfs_fs_sync_fs, - .freeze_fs = xfs_fs_freeze, - .unfreeze_fs = xfs_fs_unfreeze, - .statfs = xfs_fs_statfs, - .show_options = xfs_fs_show_options, - .nr_cached_objects = xfs_fs_nr_cached_objects, - .free_cached_objects = xfs_fs_free_cached_objects, -}; - -static struct xfs_mount * -xfs_mount_alloc(void) -{ - struct xfs_mount *mp; - - mp = kmem_alloc(sizeof(struct xfs_mount), KM_ZERO); - if (!mp) - return NULL; - - spin_lock_init(&mp->m_sb_lock); - spin_lock_init(&mp->m_agirotor_lock); - INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC); - spin_lock_init(&mp->m_perag_lock); - mutex_init(&mp->m_growlock); - atomic_set(&mp->m_active_trans, 0); - INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); - INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker); - INIT_DELAYED_WORK(&mp->m_cowblocks_work, xfs_cowblocks_worker); - mp->m_kobj.kobject.kset = xfs_kset; - /* - * We don't create the finobt per-ag space reservation until after log - * recovery, so we must set this to true so that an ifree transaction - * started during log recovery will not depend on space reservations - * for finobt expansion. - */ - mp->m_finobt_nores = true; - return mp; } static int