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fs/gfs2/ops_fstype.c
35.2 KB
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/* * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
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* Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. |
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* * This copyrighted material is made available to anyone wishing to use, * modify, copy, or redistribute it subject to the terms and conditions |
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* of the GNU General Public License version 2. |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/sched.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/completion.h> #include <linux/buffer_head.h> |
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#include <linux/blkdev.h> #include <linux/kthread.h> |
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#include <linux/export.h> |
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#include <linux/namei.h> #include <linux/mount.h> |
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#include <linux/gfs2_ondisk.h> |
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#include <linux/quotaops.h> |
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#include <linux/lockdep.h> |
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#include <linux/module.h> |
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#include "gfs2.h" |
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#include "incore.h" |
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#include "bmap.h" |
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#include "glock.h" #include "glops.h" #include "inode.h" |
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#include "recovery.h" #include "rgrp.h" #include "super.h" |
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#include "sys.h" |
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#include "util.h" |
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#include "log.h" |
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#include "quota.h" |
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#include "dir.h" |
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#include "meta_io.h" |
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#include "trace_gfs2.h" |
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#define DO 0 #define UNDO 1 |
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/** * gfs2_tune_init - Fill a gfs2_tune structure with default values * @gt: tune * */ static void gfs2_tune_init(struct gfs2_tune *gt) { spin_lock_init(>->gt_spin); |
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gt->gt_quota_warn_period = 10; gt->gt_quota_scale_num = 1; gt->gt_quota_scale_den = 1; |
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gt->gt_new_files_jdata = 0; gt->gt_max_readahead = 1 << 18; |
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gt->gt_complain_secs = 10; |
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} |
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static struct gfs2_sbd *init_sbd(struct super_block *sb) { struct gfs2_sbd *sdp; |
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struct address_space *mapping; |
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sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL); |
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if (!sdp) return NULL; |
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sb->s_fs_info = sdp; |
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sdp->sd_vfs = sb; |
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sdp->sd_lkstats = alloc_percpu(struct gfs2_pcpu_lkstats); if (!sdp->sd_lkstats) { kfree(sdp); return NULL; } |
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set_bit(SDF_NOJOURNALID, &sdp->sd_flags); |
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gfs2_tune_init(&sdp->sd_tune); |
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init_waitqueue_head(&sdp->sd_glock_wait); atomic_set(&sdp->sd_glock_disposal, 0); |
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init_completion(&sdp->sd_locking_init); |
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init_completion(&sdp->sd_wdack); |
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spin_lock_init(&sdp->sd_statfs_spin); |
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spin_lock_init(&sdp->sd_rindex_spin); |
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sdp->sd_rindex_tree.rb_node = NULL; |
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INIT_LIST_HEAD(&sdp->sd_jindex_list); spin_lock_init(&sdp->sd_jindex_spin); |
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mutex_init(&sdp->sd_jindex_mutex); |
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init_completion(&sdp->sd_journal_ready); |
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INIT_LIST_HEAD(&sdp->sd_quota_list); |
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mutex_init(&sdp->sd_quota_mutex); |
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mutex_init(&sdp->sd_quota_sync_mutex); |
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init_waitqueue_head(&sdp->sd_quota_wait); |
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INIT_LIST_HEAD(&sdp->sd_trunc_list); spin_lock_init(&sdp->sd_trunc_lock); |
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spin_lock_init(&sdp->sd_bitmap_lock); |
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mapping = &sdp->sd_aspace; |
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address_space_init_once(mapping); |
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mapping->a_ops = &gfs2_rgrp_aops; |
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mapping->host = sb->s_bdev->bd_inode; mapping->flags = 0; mapping_set_gfp_mask(mapping, GFP_NOFS); mapping->private_data = NULL; |
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mapping->writeback_index = 0; |
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spin_lock_init(&sdp->sd_log_lock); |
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atomic_set(&sdp->sd_log_pinned, 0); |
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INIT_LIST_HEAD(&sdp->sd_log_le_revoke); |
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INIT_LIST_HEAD(&sdp->sd_log_le_ordered); |
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spin_lock_init(&sdp->sd_ordered_lock); |
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init_waitqueue_head(&sdp->sd_log_waitq); init_waitqueue_head(&sdp->sd_logd_waitq); |
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spin_lock_init(&sdp->sd_ail_lock); |
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INIT_LIST_HEAD(&sdp->sd_ail1_list); INIT_LIST_HEAD(&sdp->sd_ail2_list); |
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init_rwsem(&sdp->sd_log_flush_lock); |
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atomic_set(&sdp->sd_log_in_flight, 0); |
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atomic_set(&sdp->sd_reserving_log, 0); init_waitqueue_head(&sdp->sd_reserving_log_wait); |
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init_waitqueue_head(&sdp->sd_log_flush_wait); |
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atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN); mutex_init(&sdp->sd_freeze_mutex); |
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return sdp; } |
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/** * gfs2_check_sb - Check superblock * @sdp: the filesystem * @sb: The superblock * @silent: Don't print a message if the check fails * * Checks the version code of the FS is one that we understand how to * read and that the sizes of the various on-disk structures have not * changed. */ |
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static int gfs2_check_sb(struct gfs2_sbd *sdp, int silent) |
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{ |
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struct gfs2_sb_host *sb = &sdp->sd_sb; |
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if (sb->sb_magic != GFS2_MAGIC || sb->sb_type != GFS2_METATYPE_SB) { if (!silent) |
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pr_warn("not a GFS2 filesystem "); |
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return -EINVAL; } /* If format numbers match exactly, we're done. */ if (sb->sb_fs_format == GFS2_FORMAT_FS && sb->sb_multihost_format == GFS2_FORMAT_MULTI) return 0; |
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fs_warn(sdp, "Unknown on-disk format, unable to mount "); |
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return -EINVAL; |
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} |
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static void end_bio_io_page(struct bio *bio) |
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{ struct page *page = bio->bi_private; |
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if (!bio->bi_error) |
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SetPageUptodate(page); else |
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pr_warn("error %d reading superblock ", bio->bi_error); |
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unlock_page(page); } |
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static void gfs2_sb_in(struct gfs2_sbd *sdp, const void *buf) |
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{ |
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struct gfs2_sb_host *sb = &sdp->sd_sb; struct super_block *s = sdp->sd_vfs; |
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const struct gfs2_sb *str = buf; sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic); sb->sb_type = be32_to_cpu(str->sb_header.mh_type); sb->sb_format = be32_to_cpu(str->sb_header.mh_format); sb->sb_fs_format = be32_to_cpu(str->sb_fs_format); sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format); sb->sb_bsize = be32_to_cpu(str->sb_bsize); sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift); sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr); sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino); sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr); sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino); memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN); memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN); |
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memcpy(s->s_uuid, str->sb_uuid, 16); |
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} /** * gfs2_read_super - Read the gfs2 super block from disk * @sdp: The GFS2 super block * @sector: The location of the super block * @error: The error code to return * * This uses the bio functions to read the super block from disk * because we want to be 100% sure that we never read cached data. * A super block is read twice only during each GFS2 mount and is * never written to by the filesystem. The first time its read no * locks are held, and the only details which are looked at are those * relating to the locking protocol. Once locking is up and working, * the sb is read again under the lock to establish the location of * the master directory (contains pointers to journals etc) and the * root directory. * * Returns: 0 on success or error */ |
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static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector, int silent) |
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{ struct super_block *sb = sdp->sd_vfs; struct gfs2_sb *p; struct page *page; struct bio *bio; page = alloc_page(GFP_NOFS); if (unlikely(!page)) |
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return -ENOMEM; |
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ClearPageUptodate(page); ClearPageDirty(page); lock_page(page); bio = bio_alloc(GFP_NOFS, 1); |
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bio->bi_iter.bi_sector = sector * (sb->s_blocksize >> 9); |
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bio->bi_bdev = sb->s_bdev; bio_add_page(bio, page, PAGE_SIZE, 0); bio->bi_end_io = end_bio_io_page; bio->bi_private = page; |
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submit_bio(READ_SYNC | REQ_META, bio); |
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wait_on_page_locked(page); bio_put(bio); if (!PageUptodate(page)) { __free_page(page); return -EIO; } p = kmap(page); |
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gfs2_sb_in(sdp, p); |
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kunmap(page); __free_page(page); |
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return gfs2_check_sb(sdp, silent); |
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} |
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/** * gfs2_read_sb - Read super block * @sdp: The GFS2 superblock |
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* @silent: Don't print message if mount fails * */ |
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static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent) |
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{ u32 hash_blocks, ind_blocks, leaf_blocks; u32 tmp_blocks; unsigned int x; int error; |
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error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent); |
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if (error) { if (!silent) fs_err(sdp, "can't read superblock "); return error; } |
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sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT; sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift; sdp->sd_diptrs = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode)) / sizeof(u64); sdp->sd_inptrs = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header)) / sizeof(u64); sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header); sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2; sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1; sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64); sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header)) / sizeof(struct gfs2_quota_change); |
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sdp->sd_blocks_per_bitmap = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header)) * GFS2_NBBY; /* not the rgrp bitmap, subsequent bitmaps only */ |
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/* Compute maximum reservation required to add a entry to a directory */ hash_blocks = DIV_ROUND_UP(sizeof(u64) * (1 << GFS2_DIR_MAX_DEPTH), sdp->sd_jbsize); ind_blocks = 0; for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) { tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs); ind_blocks += tmp_blocks; } leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH; sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks; sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs; for (x = 2;; x++) { u64 space, d; u32 m; space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs; d = space; m = do_div(d, sdp->sd_inptrs); if (d != sdp->sd_heightsize[x - 1] || m) break; sdp->sd_heightsize[x] = space; } sdp->sd_max_height = x; sdp->sd_heightsize[x] = ~0; gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT); sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs; for (x = 2;; x++) { u64 space, d; u32 m; space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs; d = space; m = do_div(d, sdp->sd_inptrs); if (d != sdp->sd_jheightsize[x - 1] || m) break; sdp->sd_jheightsize[x] = space; } sdp->sd_max_jheight = x; sdp->sd_jheightsize[x] = ~0; gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT); |
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sdp->sd_max_dents_per_leaf = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_leaf)) / GFS2_MIN_DIRENT_SIZE; |
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return 0; } |
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static int init_names(struct gfs2_sbd *sdp, int silent) { |
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char *proto, *table; int error = 0; proto = sdp->sd_args.ar_lockproto; table = sdp->sd_args.ar_locktable; /* Try to autodetect */ if (!proto[0] || !table[0]) { |
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error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent); |
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if (error) return error; |
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if (!proto[0]) |
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proto = sdp->sd_sb.sb_lockproto; |
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if (!table[0]) |
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table = sdp->sd_sb.sb_locktable; |
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} if (!table[0]) table = sdp->sd_vfs->s_id; |
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strlcpy(sdp->sd_proto_name, proto, GFS2_FSNAME_LEN); strlcpy(sdp->sd_table_name, table, GFS2_FSNAME_LEN); |
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table = sdp->sd_table_name; while ((table = strchr(table, '/'))) |
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*table = '_'; |
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return error; } static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh, int undo) { |
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int error = 0; if (undo) goto fail_trans; |
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error = gfs2_glock_nq_num(sdp, GFS2_MOUNT_LOCK, &gfs2_nondisk_glops, LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE, mount_gh); if (error) { fs_err(sdp, "can't acquire mount glock: %d ", error); goto fail; } error = gfs2_glock_nq_num(sdp, GFS2_LIVE_LOCK, &gfs2_nondisk_glops, LM_ST_SHARED, |
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LM_FLAG_NOEXP | GL_EXACT, |
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&sdp->sd_live_gh); if (error) { fs_err(sdp, "can't acquire live glock: %d ", error); goto fail_mount; } error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops, CREATE, &sdp->sd_rename_gl); if (error) { fs_err(sdp, "can't create rename glock: %d ", error); goto fail_live; } |
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error = gfs2_glock_get(sdp, GFS2_FREEZE_LOCK, &gfs2_freeze_glops, CREATE, &sdp->sd_freeze_gl); |
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if (error) { fs_err(sdp, "can't create transaction glock: %d ", error); goto fail_rename; } |
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return 0; |
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fail_trans: |
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gfs2_glock_put(sdp->sd_freeze_gl); |
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fail_rename: |
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gfs2_glock_put(sdp->sd_rename_gl); |
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fail_live: |
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gfs2_glock_dq_uninit(&sdp->sd_live_gh); |
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fail_mount: |
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gfs2_glock_dq_uninit(mount_gh); |
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fail: |
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return error; } |
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static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr, u64 no_addr, const char *name) |
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{ |
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struct gfs2_sbd *sdp = sb->s_fs_info; struct dentry *dentry; struct inode *inode; |
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inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0); |
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if (IS_ERR(inode)) { fs_err(sdp, "can't read in %s inode: %ld ", name, PTR_ERR(inode)); return PTR_ERR(inode); } |
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dentry = d_make_root(inode); |
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if (!dentry) { fs_err(sdp, "can't alloc %s dentry ", name); |
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return -ENOMEM; } |
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*dptr = dentry; return 0; |
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} |
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static int init_sb(struct gfs2_sbd *sdp, int silent) |
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{ struct super_block *sb = sdp->sd_vfs; struct gfs2_holder sb_gh; |
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453 |
u64 no_addr; |
9b8df98fc
|
454 |
int ret; |
b3b94faa5
|
455 |
|
9b8df98fc
|
456 457 458 459 460 461 |
ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops, LM_ST_SHARED, 0, &sb_gh); if (ret) { fs_err(sdp, "can't acquire superblock glock: %d ", ret); return ret; |
b3b94faa5
|
462 |
} |
907b9bceb
|
463 |
|
6bac243f0
|
464 |
ret = gfs2_read_sb(sdp, silent); |
9b8df98fc
|
465 466 467 |
if (ret) { fs_err(sdp, "can't read superblock: %d ", ret); |
b3b94faa5
|
468 469 470 471 |
goto out; } /* Set up the buffer cache and SB for real */ |
e1defc4ff
|
472 |
if (sdp->sd_sb.sb_bsize < bdev_logical_block_size(sb->s_bdev)) { |
9b8df98fc
|
473 |
ret = -EINVAL; |
b3b94faa5
|
474 475 476 |
fs_err(sdp, "FS block size (%u) is too small for device " "block size (%u) ", |
e1defc4ff
|
477 |
sdp->sd_sb.sb_bsize, bdev_logical_block_size(sb->s_bdev)); |
b3b94faa5
|
478 479 480 |
goto out; } if (sdp->sd_sb.sb_bsize > PAGE_SIZE) { |
9b8df98fc
|
481 |
ret = -EINVAL; |
b3b94faa5
|
482 483 484 485 486 487 |
fs_err(sdp, "FS block size (%u) is too big for machine " "page size (%u) ", sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE); goto out; } |
b3b94faa5
|
488 |
sb_set_blocksize(sb, sdp->sd_sb.sb_bsize); |
f42faf4fa
|
489 |
/* Get the root inode */ |
dbb7cae2a
|
490 |
no_addr = sdp->sd_sb.sb_root_dir.no_addr; |
9b8df98fc
|
491 492 |
ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root"); if (ret) |
f42faf4fa
|
493 |
goto out; |
b3b94faa5
|
494 |
|
9b8df98fc
|
495 496 497 498 499 500 501 502 |
/* Get the master inode */ no_addr = sdp->sd_sb.sb_master_dir.no_addr; ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master"); if (ret) { dput(sdp->sd_root_dir); goto out; } sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir); |
f42faf4fa
|
503 |
out: |
b3b94faa5
|
504 |
gfs2_glock_dq_uninit(&sb_gh); |
9b8df98fc
|
505 |
return ret; |
b3b94faa5
|
506 |
} |
f057f6cdf
|
507 |
static void gfs2_others_may_mount(struct gfs2_sbd *sdp) |
da755fdb4
|
508 |
{ |
f057f6cdf
|
509 510 |
char *message = "FIRSTMOUNT=Done"; char *envp[] = { message, NULL }; |
e0c2a9aa1
|
511 512 513 514 515 516 |
fs_info(sdp, "first mount done, others may mount "); if (sdp->sd_lockstruct.ls_ops->lm_first_done) sdp->sd_lockstruct.ls_ops->lm_first_done(sdp); |
f057f6cdf
|
517 |
kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp); |
da755fdb4
|
518 |
} |
b52896813
|
519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 |
/** * gfs2_jindex_hold - Grab a lock on the jindex * @sdp: The GFS2 superblock * @ji_gh: the holder for the jindex glock * * Returns: errno */ static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh) { struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex); struct qstr name; char buf[20]; struct gfs2_jdesc *jd; int error; name.name = buf; mutex_lock(&sdp->sd_jindex_mutex); for (;;) { error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh); if (error) break; name.len = sprintf(buf, "journal%u", sdp->sd_journals); name.hash = gfs2_disk_hash(name.name, name.len); error = gfs2_dir_check(sdp->sd_jindex, &name, NULL); if (error == -ENOENT) { error = 0; break; } gfs2_glock_dq_uninit(ji_gh); if (error) break; error = -ENOMEM; jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL); if (!jd) break; INIT_LIST_HEAD(&jd->extent_list); |
a17d758b6
|
564 |
INIT_LIST_HEAD(&jd->jd_revoke_list); |
6ecd7c2dd
|
565 |
INIT_WORK(&jd->jd_work, gfs2_recover_func); |
b52896813
|
566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 |
jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1); if (!jd->jd_inode || IS_ERR(jd->jd_inode)) { if (!jd->jd_inode) error = -ENOENT; else error = PTR_ERR(jd->jd_inode); kfree(jd); break; } spin_lock(&sdp->sd_jindex_spin); jd->jd_jid = sdp->sd_journals++; list_add_tail(&jd->jd_list, &sdp->sd_jindex_list); spin_unlock(&sdp->sd_jindex_spin); } mutex_unlock(&sdp->sd_jindex_mutex); return error; } |
1d12d175e
|
586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 |
/** * check_journal_clean - Make sure a journal is clean for a spectator mount * @sdp: The GFS2 superblock * @jd: The journal descriptor * * Returns: 0 if the journal is clean or locked, else an error */ static int check_journal_clean(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd) { int error; struct gfs2_holder j_gh; struct gfs2_log_header_host head; struct gfs2_inode *ip; ip = GFS2_I(jd->jd_inode); error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE, &j_gh); if (error) { fs_err(sdp, "Error locking journal for spectator mount. "); return -EPERM; } error = gfs2_jdesc_check(jd); if (error) { fs_err(sdp, "Error checking journal for spectator mount. "); goto out_unlock; } error = gfs2_find_jhead(jd, &head); if (error) { fs_err(sdp, "Error parsing journal for spectator mount. "); goto out_unlock; } if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { error = -EPERM; fs_err(sdp, "jid=%u: Journal is dirty, so the first mounter " "must not be a spectator. ", jd->jd_jid); } out_unlock: gfs2_glock_dq_uninit(&j_gh); return error; } |
b3b94faa5
|
631 632 |
static int init_journal(struct gfs2_sbd *sdp, int undo) { |
2b0143b5c
|
633 |
struct inode *master = d_inode(sdp->sd_master_dir); |
b3b94faa5
|
634 |
struct gfs2_holder ji_gh; |
5c676f6d3
|
635 |
struct gfs2_inode *ip; |
b3b94faa5
|
636 637 638 639 640 |
int jindex = 1; int error = 0; if (undo) { jindex = 0; |
fe64d517d
|
641 |
goto fail_jinode_gh; |
b3b94faa5
|
642 |
} |
9b8df98fc
|
643 |
sdp->sd_jindex = gfs2_lookup_simple(master, "jindex"); |
c752666c1
|
644 |
if (IS_ERR(sdp->sd_jindex)) { |
b3b94faa5
|
645 646 |
fs_err(sdp, "can't lookup journal index: %d ", error); |
c752666c1
|
647 |
return PTR_ERR(sdp->sd_jindex); |
b3b94faa5
|
648 |
} |
b3b94faa5
|
649 650 651 652 653 654 655 656 657 |
/* Load in the journal index special file */ error = gfs2_jindex_hold(sdp, &ji_gh); if (error) { fs_err(sdp, "can't read journal index: %d ", error); goto fail; } |
0e5a9fb04
|
658 |
error = -EUSERS; |
b3b94faa5
|
659 660 661 |
if (!gfs2_jindex_size(sdp)) { fs_err(sdp, "no journals! "); |
907b9bceb
|
662 |
goto fail_jindex; |
b3b94faa5
|
663 664 665 666 |
} if (sdp->sd_args.ar_spectator) { sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0); |
fd041f0b4
|
667 |
atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); |
5e687eac1
|
668 669 |
atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5); atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5); |
b3b94faa5
|
670 671 672 673 674 675 676 677 678 679 680 681 |
} else { if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) { fs_err(sdp, "can't mount journal #%u ", sdp->sd_lockstruct.ls_jid); fs_err(sdp, "there are only %u journals (0 - %u) ", gfs2_jindex_size(sdp), gfs2_jindex_size(sdp) - 1); goto fail_jindex; } sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid); |
feaa7bba0
|
682 |
error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid, |
b3b94faa5
|
683 684 685 686 687 688 689 690 |
&gfs2_journal_glops, LM_ST_EXCLUSIVE, LM_FLAG_NOEXP, &sdp->sd_journal_gh); if (error) { fs_err(sdp, "can't acquire journal glock: %d ", error); goto fail_jindex; } |
feaa7bba0
|
691 692 |
ip = GFS2_I(sdp->sd_jdesc->jd_inode); error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, |
75be73a82
|
693 |
LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE, |
b3b94faa5
|
694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 |
&sdp->sd_jinode_gh); if (error) { fs_err(sdp, "can't acquire journal inode glock: %d ", error); goto fail_journal_gh; } error = gfs2_jdesc_check(sdp->sd_jdesc); if (error) { fs_err(sdp, "my journal (%u) is bad: %d ", sdp->sd_jdesc->jd_jid, error); goto fail_jinode_gh; } |
fd041f0b4
|
709 |
atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); |
5e687eac1
|
710 711 |
atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5); atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5); |
da6dd40d5
|
712 713 |
/* Map the extents for this journal's blocks */ |
b50f227bd
|
714 |
gfs2_map_journal_extents(sdp, sdp->sd_jdesc); |
b3b94faa5
|
715 |
} |
63997775b
|
716 |
trace_gfs2_log_blocks(sdp, atomic_read(&sdp->sd_log_blks_free)); |
b3b94faa5
|
717 718 719 720 |
if (sdp->sd_lockstruct.ls_first) { unsigned int x; for (x = 0; x < sdp->sd_journals; x++) { |
1d12d175e
|
721 722 723 724 725 726 727 728 729 |
struct gfs2_jdesc *jd = gfs2_jdesc_find(sdp, x); if (sdp->sd_args.ar_spectator) { error = check_journal_clean(sdp, jd); if (error) goto fail_jinode_gh; continue; } error = gfs2_recover_journal(jd, true); |
b3b94faa5
|
730 731 732 733 734 735 736 |
if (error) { fs_err(sdp, "error recovering journal %u: %d ", x, error); goto fail_jinode_gh; } } |
f057f6cdf
|
737 |
gfs2_others_may_mount(sdp); |
b3b94faa5
|
738 |
} else if (!sdp->sd_args.ar_spectator) { |
6ecd7c2dd
|
739 |
error = gfs2_recover_journal(sdp->sd_jdesc, true); |
b3b94faa5
|
740 741 742 743 744 745 |
if (error) { fs_err(sdp, "error recovering my journal: %d ", error); goto fail_jinode_gh; } } |
086cc672e
|
746 |
sdp->sd_log_idle = 1; |
b3b94faa5
|
747 748 749 |
set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags); gfs2_glock_dq_uninit(&ji_gh); jindex = 0; |
2e60d7683
|
750 |
INIT_WORK(&sdp->sd_freeze_work, gfs2_freeze_func); |
b3b94faa5
|
751 |
return 0; |
a91ea69ff
|
752 |
fail_jinode_gh: |
b3b94faa5
|
753 754 |
if (!sdp->sd_args.ar_spectator) gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); |
a91ea69ff
|
755 |
fail_journal_gh: |
b3b94faa5
|
756 757 |
if (!sdp->sd_args.ar_spectator) gfs2_glock_dq_uninit(&sdp->sd_journal_gh); |
a91ea69ff
|
758 |
fail_jindex: |
b3b94faa5
|
759 760 761 |
gfs2_jindex_free(sdp); if (jindex) gfs2_glock_dq_uninit(&ji_gh); |
a91ea69ff
|
762 |
fail: |
f42faf4fa
|
763 |
iput(sdp->sd_jindex); |
b3b94faa5
|
764 765 |
return error; } |
56aa72d0f
|
766 |
static struct lock_class_key gfs2_quota_imutex_key; |
b3b94faa5
|
767 768 769 |
static int init_inodes(struct gfs2_sbd *sdp, int undo) { |
b3b94faa5
|
770 |
int error = 0; |
2b0143b5c
|
771 |
struct inode *master = d_inode(sdp->sd_master_dir); |
b3b94faa5
|
772 773 |
if (undo) |
f42faf4fa
|
774 |
goto fail_qinode; |
f42faf4fa
|
775 |
error = init_journal(sdp, undo); |
0e48e055a
|
776 |
complete_all(&sdp->sd_journal_ready); |
f42faf4fa
|
777 |
if (error) |
9b8df98fc
|
778 |
goto fail; |
b3b94faa5
|
779 |
|
b3b94faa5
|
780 |
/* Read in the master statfs inode */ |
9b8df98fc
|
781 |
sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs"); |
c752666c1
|
782 783 |
if (IS_ERR(sdp->sd_statfs_inode)) { error = PTR_ERR(sdp->sd_statfs_inode); |
b3b94faa5
|
784 785 |
fs_err(sdp, "can't read in statfs inode: %d ", error); |
8d8291ae9
|
786 |
goto fail_journal; |
b3b94faa5
|
787 788 789 |
} /* Read in the resource index inode */ |
9b8df98fc
|
790 |
sdp->sd_rindex = gfs2_lookup_simple(master, "rindex"); |
c752666c1
|
791 792 |
if (IS_ERR(sdp->sd_rindex)) { error = PTR_ERR(sdp->sd_rindex); |
b3b94faa5
|
793 794 795 796 |
fs_err(sdp, "can't get resource index inode: %d ", error); goto fail_statfs; } |
cf45b752c
|
797 |
sdp->sd_rindex_uptodate = 0; |
b3b94faa5
|
798 799 |
/* Read in the quota inode */ |
9b8df98fc
|
800 |
sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota"); |
c752666c1
|
801 802 |
if (IS_ERR(sdp->sd_quota_inode)) { error = PTR_ERR(sdp->sd_quota_inode); |
b3b94faa5
|
803 804 805 806 |
fs_err(sdp, "can't get quota file inode: %d ", error); goto fail_rindex; } |
56aa72d0f
|
807 808 809 810 811 812 |
/* * i_mutex on quota files is special. Since this inode is hidden system * file, we are safe to define locking ourselves. */ lockdep_set_class(&sdp->sd_quota_inode->i_mutex, &gfs2_quota_imutex_key); |
a365fbf35
|
813 814 815 816 |
error = gfs2_rindex_update(sdp); if (error) goto fail_qinode; |
b3b94faa5
|
817 |
return 0; |
f42faf4fa
|
818 819 |
fail_qinode: iput(sdp->sd_quota_inode); |
f42faf4fa
|
820 |
fail_rindex: |
b3b94faa5
|
821 |
gfs2_clear_rgrpd(sdp); |
f42faf4fa
|
822 |
iput(sdp->sd_rindex); |
f42faf4fa
|
823 824 |
fail_statfs: iput(sdp->sd_statfs_inode); |
f42faf4fa
|
825 826 |
fail_journal: init_journal(sdp, UNDO); |
f42faf4fa
|
827 |
fail: |
b3b94faa5
|
828 829 830 831 832 |
return error; } static int init_per_node(struct gfs2_sbd *sdp, int undo) { |
f42faf4fa
|
833 |
struct inode *pn = NULL; |
b3b94faa5
|
834 835 |
char buf[30]; int error = 0; |
5c676f6d3
|
836 |
struct gfs2_inode *ip; |
2b0143b5c
|
837 |
struct inode *master = d_inode(sdp->sd_master_dir); |
b3b94faa5
|
838 839 840 841 842 843 |
if (sdp->sd_args.ar_spectator) return 0; if (undo) goto fail_qc_gh; |
9b8df98fc
|
844 |
pn = gfs2_lookup_simple(master, "per_node"); |
c752666c1
|
845 846 |
if (IS_ERR(pn)) { error = PTR_ERR(pn); |
b3b94faa5
|
847 848 849 850 |
fs_err(sdp, "can't find per_node directory: %d ", error); return error; } |
b3b94faa5
|
851 |
sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid); |
c752666c1
|
852 853 854 |
sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf); if (IS_ERR(sdp->sd_sc_inode)) { error = PTR_ERR(sdp->sd_sc_inode); |
b3b94faa5
|
855 856 |
fs_err(sdp, "can't find local \"sc\" file: %d ", error); |
8d8291ae9
|
857 |
goto fail; |
b3b94faa5
|
858 |
} |
b3b94faa5
|
859 |
sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid); |
c752666c1
|
860 861 862 |
sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf); if (IS_ERR(sdp->sd_qc_inode)) { error = PTR_ERR(sdp->sd_qc_inode); |
b3b94faa5
|
863 864 865 866 |
fs_err(sdp, "can't find local \"qc\" file: %d ", error); goto fail_ut_i; } |
f42faf4fa
|
867 |
iput(pn); |
b3b94faa5
|
868 |
pn = NULL; |
feaa7bba0
|
869 |
ip = GFS2_I(sdp->sd_sc_inode); |
8d8291ae9
|
870 |
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, |
b3b94faa5
|
871 872 873 874 |
&sdp->sd_sc_gh); if (error) { fs_err(sdp, "can't lock local \"sc\" file: %d ", error); |
8d8291ae9
|
875 |
goto fail_qc_i; |
b3b94faa5
|
876 |
} |
feaa7bba0
|
877 |
ip = GFS2_I(sdp->sd_qc_inode); |
8d8291ae9
|
878 |
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, |
b3b94faa5
|
879 880 881 882 883 884 885 886 |
&sdp->sd_qc_gh); if (error) { fs_err(sdp, "can't lock local \"qc\" file: %d ", error); goto fail_ut_gh; } return 0; |
a91ea69ff
|
887 |
fail_qc_gh: |
b3b94faa5
|
888 |
gfs2_glock_dq_uninit(&sdp->sd_qc_gh); |
a91ea69ff
|
889 |
fail_ut_gh: |
b3b94faa5
|
890 |
gfs2_glock_dq_uninit(&sdp->sd_sc_gh); |
a91ea69ff
|
891 |
fail_qc_i: |
f42faf4fa
|
892 |
iput(sdp->sd_qc_inode); |
a91ea69ff
|
893 |
fail_ut_i: |
f42faf4fa
|
894 |
iput(sdp->sd_sc_inode); |
a91ea69ff
|
895 |
fail: |
6fde22426
|
896 |
iput(pn); |
b3b94faa5
|
897 898 |
return error; } |
f057f6cdf
|
899 900 901 902 903 904 905 906 |
static const match_table_t nolock_tokens = { { Opt_jid, "jid=%d ", }, { Opt_err, NULL }, }; static const struct lm_lockops nolock_ops = { .lm_proto_name = "lock_nolock", |
fc0e38dae
|
907 |
.lm_put_lock = gfs2_glock_free, |
f057f6cdf
|
908 909 |
.lm_tokens = &nolock_tokens, }; |
da755fdb4
|
910 911 912 |
/** * gfs2_lm_mount - mount a locking protocol * @sdp: the filesystem |
3ad2f3fbb
|
913 |
* @args: mount arguments |
da755fdb4
|
914 915 916 917 918 919 920 |
* @silent: if 1, don't complain if the FS isn't a GFS2 fs * * Returns: errno */ static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent) { |
f057f6cdf
|
921 922 923 924 925 |
const struct lm_lockops *lm; struct lm_lockstruct *ls = &sdp->sd_lockstruct; struct gfs2_args *args = &sdp->sd_args; const char *proto = sdp->sd_proto_name; const char *table = sdp->sd_table_name; |
f057f6cdf
|
926 927 |
char *o, *options; int ret; |
da755fdb4
|
928 |
|
f057f6cdf
|
929 930 931 |
if (!strcmp("lock_nolock", proto)) { lm = &nolock_ops; sdp->sd_args.ar_localflocks = 1; |
f057f6cdf
|
932 933 934 935 936 |
#ifdef CONFIG_GFS2_FS_LOCKING_DLM } else if (!strcmp("lock_dlm", proto)) { lm = &gfs2_dlm_ops; #endif } else { |
d77d1b58a
|
937 938 |
pr_info("can't find protocol %s ", proto); |
f057f6cdf
|
939 940 |
return -ENOENT; } |
da755fdb4
|
941 942 943 |
fs_info(sdp, "Trying to join cluster \"%s\", \"%s\" ", proto, table); |
f057f6cdf
|
944 945 |
ls->ls_ops = lm; ls->ls_first = 1; |
da755fdb4
|
946 |
|
f057f6cdf
|
947 948 949 950 951 952 953 954 955 956 957 958 959 |
for (options = args->ar_hostdata; (o = strsep(&options, ":")); ) { substring_t tmp[MAX_OPT_ARGS]; int token, option; if (!o || !*o) continue; token = match_token(o, *lm->lm_tokens, tmp); switch (token) { case Opt_jid: ret = match_int(&tmp[0], &option); if (ret || option < 0) goto hostdata_error; |
ba6e93645
|
960 961 |
if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags)) ls->ls_jid = option; |
f057f6cdf
|
962 963 |
break; case Opt_id: |
4875647a0
|
964 |
case Opt_nodir: |
2b88f7c53
|
965 |
/* Obsolete, but left for backward compat purposes */ |
f057f6cdf
|
966 967 968 969 970 971 972 |
break; case Opt_first: ret = match_int(&tmp[0], &option); if (ret || (option != 0 && option != 1)) goto hostdata_error; ls->ls_first = option; break; |
f057f6cdf
|
973 974 975 976 977 978 979 |
case Opt_err: default: hostdata_error: fs_info(sdp, "unknown hostdata (%s) ", o); return -EINVAL; } |
da755fdb4
|
980 |
} |
f057f6cdf
|
981 982 983 |
if (lm->lm_mount == NULL) { fs_info(sdp, "Now mounting FS... "); |
192370399
|
984 |
complete_all(&sdp->sd_locking_init); |
f057f6cdf
|
985 |
return 0; |
da755fdb4
|
986 |
} |
e0c2a9aa1
|
987 |
ret = lm->lm_mount(sdp, table); |
f057f6cdf
|
988 989 990 |
if (ret == 0) fs_info(sdp, "Joined cluster. Now mounting FS... "); |
192370399
|
991 |
complete_all(&sdp->sd_locking_init); |
f057f6cdf
|
992 |
return ret; |
da755fdb4
|
993 994 995 996 |
} void gfs2_lm_unmount(struct gfs2_sbd *sdp) { |
f057f6cdf
|
997 998 999 1000 |
const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops; if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) && lm->lm_unmount) lm->lm_unmount(sdp); |
da755fdb4
|
1001 |
} |
b3b94faa5
|
1002 |
|
ba6e93645
|
1003 1004 |
static int wait_on_journal(struct gfs2_sbd *sdp) { |
ba6e93645
|
1005 1006 |
if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) return 0; |
743162013
|
1007 1008 |
return wait_on_bit(&sdp->sd_flags, SDF_NOJOURNALID, TASK_INTERRUPTIBLE) ? -EINTR : 0; |
ba6e93645
|
1009 |
} |
8633ecfab
|
1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 |
void gfs2_online_uevent(struct gfs2_sbd *sdp) { struct super_block *sb = sdp->sd_vfs; char ro[20]; char spectator[20]; char *envp[] = { ro, spectator, NULL }; sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0); sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); kobject_uevent_env(&sdp->sd_kobj, KOBJ_ONLINE, envp); } |
b3b94faa5
|
1020 1021 1022 1023 1024 1025 1026 1027 |
/** * fill_super - Read in superblock * @sb: The VFS superblock * @data: Mount options * @silent: Don't complain if it's not a GFS2 filesystem * * Returns: errno */ |
f55073ff1
|
1028 |
static int fill_super(struct super_block *sb, struct gfs2_args *args, int silent) |
b3b94faa5
|
1029 1030 1031 1032 1033 1034 1035 |
{ struct gfs2_sbd *sdp; struct gfs2_holder mount_gh; int error; sdp = init_sbd(sb); if (!sdp) { |
d77d1b58a
|
1036 1037 |
pr_warn("can't alloc struct gfs2_sbd "); |
b3b94faa5
|
1038 1039 |
return -ENOMEM; } |
f55073ff1
|
1040 |
sdp->sd_args = *args; |
b3b94faa5
|
1041 |
|
fe64d517d
|
1042 |
if (sdp->sd_args.ar_spectator) { |
6f04c1c7f
|
1043 |
sb->s_flags |= MS_RDONLY; |
e8ca5cc57
|
1044 |
set_bit(SDF_RORECOVERY, &sdp->sd_flags); |
fe64d517d
|
1045 |
} |
6f04c1c7f
|
1046 1047 |
if (sdp->sd_args.ar_posix_acl) sb->s_flags |= MS_POSIXACL; |
f25934c5f
|
1048 1049 |
if (sdp->sd_args.ar_nobarrier) set_bit(SDF_NOBARRIERS, &sdp->sd_flags); |
6f04c1c7f
|
1050 |
|
9964afbb7
|
1051 |
sb->s_flags |= MS_NOSEC; |
719ee3446
|
1052 1053 |
sb->s_magic = GFS2_MAGIC; sb->s_op = &gfs2_super_ops; |
41ced6dcf
|
1054 |
sb->s_d_op = &gfs2_dops; |
719ee3446
|
1055 |
sb->s_export_op = &gfs2_export_ops; |
40b78a322
|
1056 |
sb->s_xattr = gfs2_xattr_handlers; |
cc632e7f9
|
1057 |
sb->s_qcop = &gfs2_quotactl_ops; |
de3b08d3e
|
1058 |
sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; |
cc632e7f9
|
1059 |
sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; |
719ee3446
|
1060 1061 |
sb->s_time_gran = 1; sb->s_maxbytes = MAX_LFS_FILESIZE; |
419c93e0b
|
1062 1063 1064 1065 1066 1067 1068 1069 |
/* Set up the buffer cache and fill in some fake block size values to allow us to read-in the on-disk superblock. */ sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK); sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits; sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT; sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift; |
b3b94faa5
|
1070 |
|
5e687eac1
|
1071 |
sdp->sd_tune.gt_logd_secs = sdp->sd_args.ar_commit; |
3d3c10f2c
|
1072 1073 1074 1075 |
sdp->sd_tune.gt_quota_quantum = sdp->sd_args.ar_quota_quantum; if (sdp->sd_args.ar_statfs_quantum) { sdp->sd_tune.gt_statfs_slow = 0; sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum; |
32e471ef1
|
1076 |
} else { |
3d3c10f2c
|
1077 1078 1079 |
sdp->sd_tune.gt_statfs_slow = 1; sdp->sd_tune.gt_statfs_quantum = 30; } |
48c2b6136
|
1080 |
|
b3b94faa5
|
1081 |
error = init_names(sdp, silent); |
0d515210b
|
1082 1083 1084 1085 1086 1087 1088 1089 |
if (error) { /* In this case, we haven't initialized sysfs, so we have to manually free the sdp. */ free_percpu(sdp->sd_lkstats); kfree(sdp); sb->s_fs_info = NULL; return error; } |
b3b94faa5
|
1090 |
|
e0c2a9aa1
|
1091 |
snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s", sdp->sd_table_name); |
b3b94faa5
|
1092 |
error = gfs2_sys_fs_add(sdp); |
0d515210b
|
1093 1094 1095 1096 1097 1098 1099 |
/* * If we hit an error here, gfs2_sys_fs_add will have called function * kobject_put which causes the sysfs usage count to go to zero, which * causes sysfs to call function gfs2_sbd_release, which frees sdp. * Subsequent error paths here will call gfs2_sys_fs_del, which also * kobject_put to free sdp. */ |
b3b94faa5
|
1100 |
if (error) |
0d515210b
|
1101 1102 1103 |
return error; gfs2_create_debugfs_file(sdp); |
b3b94faa5
|
1104 1105 1106 |
error = gfs2_lm_mount(sdp, silent); if (error) |
0d515210b
|
1107 |
goto fail_debug; |
b3b94faa5
|
1108 1109 1110 1111 |
error = init_locking(sdp, &mount_gh, DO); if (error) goto fail_lm; |
9b8df98fc
|
1112 |
error = init_sb(sdp, silent); |
b3b94faa5
|
1113 1114 |
if (error) goto fail_locking; |
b3b94faa5
|
1115 |
|
ba6e93645
|
1116 1117 1118 |
error = wait_on_journal(sdp); if (error) goto fail_sb; |
feb47ca93
|
1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 |
/* * If user space has failed to join the cluster or some similar * failure has occurred, then the journal id will contain a * negative (error) number. This will then be returned to the * caller (of the mount syscall). We do this even for spectator * mounts (which just write a jid of 0 to indicate "ok" even though * the jid is unused in the spectator case) */ if (sdp->sd_lockstruct.ls_jid < 0) { error = sdp->sd_lockstruct.ls_jid; sdp->sd_lockstruct.ls_jid = 0; goto fail_sb; } |
e0c2a9aa1
|
1132 1133 1134 1135 1136 1137 |
if (sdp->sd_args.ar_spectator) snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.s", sdp->sd_table_name); else snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", sdp->sd_table_name, sdp->sd_lockstruct.ls_jid); |
b3b94faa5
|
1138 1139 |
error = init_inodes(sdp, DO); if (error) |
f42faf4fa
|
1140 |
goto fail_sb; |
b3b94faa5
|
1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 |
error = init_per_node(sdp, DO); if (error) goto fail_inodes; error = gfs2_statfs_init(sdp); if (error) { fs_err(sdp, "can't initialize statfs subsystem: %d ", error); goto fail_per_node; } |
b3b94faa5
|
1152 1153 1154 1155 1156 |
if (!(sb->s_flags & MS_RDONLY)) { error = gfs2_make_fs_rw(sdp); if (error) { fs_err(sdp, "can't make FS RW: %d ", error); |
8ad151c2a
|
1157 |
goto fail_per_node; |
b3b94faa5
|
1158 1159 1160 1161 |
} } gfs2_glock_dq_uninit(&mount_gh); |
8633ecfab
|
1162 |
gfs2_online_uevent(sdp); |
b3b94faa5
|
1163 |
return 0; |
a91ea69ff
|
1164 |
fail_per_node: |
b3b94faa5
|
1165 |
init_per_node(sdp, UNDO); |
a91ea69ff
|
1166 |
fail_inodes: |
b3b94faa5
|
1167 |
init_inodes(sdp, UNDO); |
a91ea69ff
|
1168 |
fail_sb: |
9b8df98fc
|
1169 1170 1171 1172 |
if (sdp->sd_root_dir) dput(sdp->sd_root_dir); if (sdp->sd_master_dir) dput(sdp->sd_master_dir); |
e7c8707ea
|
1173 1174 |
if (sb->s_root) dput(sb->s_root); |
9b8df98fc
|
1175 |
sb->s_root = NULL; |
a91ea69ff
|
1176 |
fail_locking: |
b3b94faa5
|
1177 |
init_locking(sdp, &mount_gh, UNDO); |
a91ea69ff
|
1178 |
fail_lm: |
0e48e055a
|
1179 |
complete_all(&sdp->sd_journal_ready); |
fefc03bfe
|
1180 |
gfs2_gl_hash_clear(sdp); |
b3b94faa5
|
1181 |
gfs2_lm_unmount(sdp); |
0d515210b
|
1182 |
fail_debug: |
5f8820960
|
1183 |
gfs2_delete_debugfs_file(sdp); |
a245769f2
|
1184 |
free_percpu(sdp->sd_lkstats); |
0d515210b
|
1185 1186 1187 |
/* gfs2_sys_fs_del must be the last thing we do, since it causes * sysfs to call function gfs2_sbd_release, which frees sdp. */ gfs2_sys_fs_del(sdp); |
5c676f6d3
|
1188 |
sb->s_fs_info = NULL; |
b3b94faa5
|
1189 1190 |
return error; } |
f55073ff1
|
1191 |
static int set_gfs2_super(struct super_block *s, void *data) |
b3b94faa5
|
1192 |
{ |
f55073ff1
|
1193 1194 1195 1196 1197 1198 1199 1200 1201 |
s->s_bdev = data; s->s_dev = s->s_bdev->bd_dev; /* * We set the bdi here to the queue backing, file systems can * overwrite this in ->fill_super() */ s->s_bdi = &bdev_get_queue(s->s_bdev)->backing_dev_info; return 0; |
863846054
|
1202 |
} |
f55073ff1
|
1203 |
static int test_gfs2_super(struct super_block *s, void *ptr) |
f6d03139d
|
1204 1205 1206 1207 |
{ struct block_device *bdev = ptr; return (bdev == s->s_bdev); } |
f55073ff1
|
1208 |
/** |
8bcbbf000
|
1209 |
* gfs2_mount - Get the GFS2 superblock |
f55073ff1
|
1210 1211 1212 1213 |
* @fs_type: The GFS2 filesystem type * @flags: Mount flags * @dev_name: The name of the device * @data: The mount arguments |
f55073ff1
|
1214 1215 1216 1217 1218 1219 1220 |
* * Q. Why not use get_sb_bdev() ? * A. We need to select one of two root directories to mount, independent * of whether this is the initial, or subsequent, mount of this sb * * Returns: 0 or -ve on error */ |
8bcbbf000
|
1221 1222 |
static struct dentry *gfs2_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) |
f55073ff1
|
1223 1224 1225 |
{ struct block_device *bdev; struct super_block *s; |
d4d776299
|
1226 |
fmode_t mode = FMODE_READ | FMODE_EXCL; |
f55073ff1
|
1227 1228 1229 1230 1231 1232 |
int error; struct gfs2_args args; struct gfs2_sbd *sdp; if (!(flags & MS_RDONLY)) mode |= FMODE_WRITE; |
d4d776299
|
1233 |
bdev = blkdev_get_by_path(dev_name, mode, fs_type); |
f55073ff1
|
1234 |
if (IS_ERR(bdev)) |
8bcbbf000
|
1235 |
return ERR_CAST(bdev); |
f55073ff1
|
1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 |
/* * once the super is inserted into the list by sget, s_umount * will protect the lockfs code from trying to start a snapshot * while we are mounting */ mutex_lock(&bdev->bd_fsfreeze_mutex); if (bdev->bd_fsfreeze_count > 0) { mutex_unlock(&bdev->bd_fsfreeze_mutex); error = -EBUSY; goto error_bdev; } |
9249e17fe
|
1248 |
s = sget(fs_type, test_gfs2_super, set_gfs2_super, flags, bdev); |
f55073ff1
|
1249 1250 1251 1252 |
mutex_unlock(&bdev->bd_fsfreeze_mutex); error = PTR_ERR(s); if (IS_ERR(s)) goto error_bdev; |
dfe5b9ad8
|
1253 1254 1255 1256 1257 1258 1259 1260 1261 |
if (s->s_root) { /* * s_umount nests inside bd_mutex during * __invalidate_device(). blkdev_put() acquires * bd_mutex and can't be called under s_umount. Drop * s_umount temporarily. This is safe as we're * holding an active reference. */ up_write(&s->s_umount); |
d4d776299
|
1262 |
blkdev_put(bdev, mode); |
dfe5b9ad8
|
1263 |
down_write(&s->s_umount); |
6de20eb0d
|
1264 1265 1266 |
} else { /* s_mode must be set before deactivate_locked_super calls */ s->s_mode = mode; |
dfe5b9ad8
|
1267 |
} |
8bcbbf000
|
1268 |
|
f55073ff1
|
1269 1270 1271 |
memset(&args, 0, sizeof(args)); args.ar_quota = GFS2_QUOTA_DEFAULT; args.ar_data = GFS2_DATA_DEFAULT; |
5e687eac1
|
1272 |
args.ar_commit = 30; |
3d3c10f2c
|
1273 1274 |
args.ar_statfs_quantum = 30; args.ar_quota_quantum = 60; |
f55073ff1
|
1275 1276 1277 1278 |
args.ar_errors = GFS2_ERRORS_DEFAULT; error = gfs2_mount_args(&args, data); if (error) { |
d77d1b58a
|
1279 1280 |
pr_warn("can't parse mount arguments "); |
8bcbbf000
|
1281 |
goto error_super; |
f55073ff1
|
1282 1283 1284 1285 1286 1287 |
} if (s->s_root) { error = -EBUSY; if ((flags ^ s->s_flags) & MS_RDONLY) goto error_super; |
f55073ff1
|
1288 |
} else { |
a1c6f0573
|
1289 |
snprintf(s->s_id, sizeof(s->s_id), "%pg", bdev); |
f55073ff1
|
1290 1291 |
sb_set_blocksize(s, block_size(bdev)); error = fill_super(s, &args, flags & MS_SILENT ? 1 : 0); |
8bcbbf000
|
1292 1293 |
if (error) goto error_super; |
f55073ff1
|
1294 1295 1296 1297 1298 |
s->s_flags |= MS_ACTIVE; bdev->bd_super = s; } sdp = s->s_fs_info; |
f55073ff1
|
1299 |
if (args.ar_meta) |
8bcbbf000
|
1300 |
return dget(sdp->sd_master_dir); |
f55073ff1
|
1301 |
else |
8bcbbf000
|
1302 |
return dget(sdp->sd_root_dir); |
f55073ff1
|
1303 1304 1305 |
error_super: deactivate_locked_super(s); |
8bcbbf000
|
1306 |
return ERR_PTR(error); |
f55073ff1
|
1307 |
error_bdev: |
d4d776299
|
1308 |
blkdev_put(bdev, mode); |
8bcbbf000
|
1309 |
return ERR_PTR(error); |
f55073ff1
|
1310 |
} |
f6d03139d
|
1311 1312 1313 1314 |
static int set_meta_super(struct super_block *s, void *ptr) { return -EINVAL; } |
8bcbbf000
|
1315 1316 |
static struct dentry *gfs2_mount_meta(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) |
863846054
|
1317 |
{ |
f6d03139d
|
1318 |
struct super_block *s; |
003dec891
|
1319 |
struct gfs2_sbd *sdp; |
e24977d45
|
1320 |
struct path path; |
863846054
|
1321 |
int error; |
907b9bceb
|
1322 |
|
e24977d45
|
1323 |
error = kern_path(dev_name, LOOKUP_FOLLOW, &path); |
863846054
|
1324 |
if (error) { |
d77d1b58a
|
1325 1326 1327 |
pr_warn("path_lookup on %s returned error %d ", dev_name, error); |
8bcbbf000
|
1328 |
return ERR_PTR(error); |
863846054
|
1329 |
} |
9249e17fe
|
1330 |
s = sget(&gfs2_fs_type, test_gfs2_super, set_meta_super, flags, |
2b0143b5c
|
1331 |
d_inode(path.dentry)->i_sb->s_bdev); |
e24977d45
|
1332 |
path_put(&path); |
f6d03139d
|
1333 |
if (IS_ERR(s)) { |
d77d1b58a
|
1334 1335 |
pr_warn("gfs2 mount does not exist "); |
8bcbbf000
|
1336 |
return ERR_CAST(s); |
863846054
|
1337 |
} |
f55073ff1
|
1338 1339 |
if ((flags ^ s->s_flags) & MS_RDONLY) { deactivate_locked_super(s); |
8bcbbf000
|
1340 |
return ERR_PTR(-EBUSY); |
f55073ff1
|
1341 |
} |
f6d03139d
|
1342 |
sdp = s->s_fs_info; |
8bcbbf000
|
1343 |
return dget(sdp->sd_master_dir); |
b3b94faa5
|
1344 |
} |
419c93e0b
|
1345 1346 |
static void gfs2_kill_sb(struct super_block *sb) { |
863846054
|
1347 |
struct gfs2_sbd *sdp = sb->s_fs_info; |
88a19ad06
|
1348 1349 1350 1351 |
if (sdp == NULL) { kill_block_super(sb); return; |
3af165ac4
|
1352 |
} |
88a19ad06
|
1353 |
|
24972557b
|
1354 |
gfs2_log_flush(sdp, NULL, SYNC_FLUSH); |
88a19ad06
|
1355 1356 1357 1358 |
dput(sdp->sd_root_dir); dput(sdp->sd_master_dir); sdp->sd_root_dir = NULL; sdp->sd_master_dir = NULL; |
fefc03bfe
|
1359 |
shrink_dcache_sb(sb); |
88a19ad06
|
1360 |
gfs2_delete_debugfs_file(sdp); |
a245769f2
|
1361 |
free_percpu(sdp->sd_lkstats); |
0d515210b
|
1362 |
kill_block_super(sb); |
863846054
|
1363 |
} |
b3b94faa5
|
1364 1365 1366 |
struct file_system_type gfs2_fs_type = { .name = "gfs2", .fs_flags = FS_REQUIRES_DEV, |
8bcbbf000
|
1367 |
.mount = gfs2_mount, |
419c93e0b
|
1368 1369 1370 |
.kill_sb = gfs2_kill_sb, .owner = THIS_MODULE, }; |
7f78e0351
|
1371 |
MODULE_ALIAS_FS("gfs2"); |
419c93e0b
|
1372 1373 1374 1375 |
struct file_system_type gfs2meta_fs_type = { .name = "gfs2meta", .fs_flags = FS_REQUIRES_DEV, |
8bcbbf000
|
1376 |
.mount = gfs2_mount_meta, |
b3b94faa5
|
1377 1378 |
.owner = THIS_MODULE, }; |
7f78e0351
|
1379 |
MODULE_ALIAS_FS("gfs2meta"); |