diff options
Diffstat (limited to 'fs/gfs2/ops_super.c')
| -rw-r--r-- | fs/gfs2/ops_super.c | 515 |
1 files changed, 0 insertions, 515 deletions
diff --git a/fs/gfs2/ops_super.c b/fs/gfs2/ops_super.c deleted file mode 100644 index 5e524217944..00000000000 --- a/fs/gfs2/ops_super.c +++ /dev/null @@ -1,515 +0,0 @@ -/* - * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. - * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. - * - * This copyrighted material is made available to anyone wishing to use, - * modify, copy, or redistribute it subject to the terms and conditions - * of the GNU General Public License version 2. - */ - -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/spinlock.h> -#include <linux/completion.h> -#include <linux/buffer_head.h> -#include <linux/statfs.h> -#include <linux/seq_file.h> -#include <linux/mount.h> -#include <linux/kthread.h> -#include <linux/delay.h> -#include <linux/gfs2_ondisk.h> -#include <linux/crc32.h> -#include <linux/lm_interface.h> - -#include "gfs2.h" -#include "incore.h" -#include "glock.h" -#include "inode.h" -#include "lm.h" -#include "log.h" -#include "mount.h" -#include "ops_super.h" -#include "quota.h" -#include "recovery.h" -#include "rgrp.h" -#include "super.h" -#include "sys.h" -#include "util.h" -#include "trans.h" -#include "dir.h" -#include "eattr.h" -#include "bmap.h" - -/** - * gfs2_write_inode - Make sure the inode is stable on the disk - * @inode: The inode - * @sync: synchronous write flag - * - * Returns: errno - */ - -static int gfs2_write_inode(struct inode *inode, int sync) -{ - struct gfs2_inode *ip = GFS2_I(inode); - - /* Check this is a "normal" inode */ - if (inode->i_private) { - if (current->flags & PF_MEMALLOC) - return 0; - if (sync) - gfs2_log_flush(GFS2_SB(inode), ip->i_gl); - } - - return 0; -} - -/** - * gfs2_put_super - Unmount the filesystem - * @sb: The VFS superblock - * - */ - -static void gfs2_put_super(struct super_block *sb) -{ - struct gfs2_sbd *sdp = sb->s_fs_info; - int error; - - if (!sdp) - return; - - if (!strncmp(sb->s_type->name, "gfs2meta", 8)) - return; /* Nothing to do */ - - /* Unfreeze the filesystem, if we need to */ - - mutex_lock(&sdp->sd_freeze_lock); - if (sdp->sd_freeze_count) - gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); - mutex_unlock(&sdp->sd_freeze_lock); - - kthread_stop(sdp->sd_quotad_process); - kthread_stop(sdp->sd_logd_process); - kthread_stop(sdp->sd_recoverd_process); - while (sdp->sd_glockd_num--) - kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]); - - if (!(sb->s_flags & MS_RDONLY)) { - error = gfs2_make_fs_ro(sdp); - if (error) - gfs2_io_error(sdp); - } - /* At this point, we're through modifying the disk */ - - /* Release stuff */ - - iput(sdp->sd_master_dir); - iput(sdp->sd_jindex); - iput(sdp->sd_inum_inode); - iput(sdp->sd_statfs_inode); - iput(sdp->sd_rindex); - iput(sdp->sd_quota_inode); - - gfs2_glock_put(sdp->sd_rename_gl); - gfs2_glock_put(sdp->sd_trans_gl); - - if (!sdp->sd_args.ar_spectator) { - gfs2_glock_dq_uninit(&sdp->sd_journal_gh); - gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); - gfs2_glock_dq_uninit(&sdp->sd_ir_gh); - gfs2_glock_dq_uninit(&sdp->sd_sc_gh); - gfs2_glock_dq_uninit(&sdp->sd_qc_gh); - iput(sdp->sd_ir_inode); - iput(sdp->sd_sc_inode); - iput(sdp->sd_qc_inode); - } - - gfs2_glock_dq_uninit(&sdp->sd_live_gh); - gfs2_clear_rgrpd(sdp); - gfs2_jindex_free(sdp); - /* Take apart glock structures and buffer lists */ - gfs2_gl_hash_clear(sdp, WAIT); - /* Unmount the locking protocol */ - gfs2_lm_unmount(sdp); - - /* At this point, we're through participating in the lockspace */ - gfs2_sys_fs_del(sdp); - kfree(sdp); -} - -/** - * gfs2_write_super - * @sb: the superblock - * - */ - -static void gfs2_write_super(struct super_block *sb) -{ - sb->s_dirt = 0; -} - -/** - * gfs2_sync_fs - sync the filesystem - * @sb: the superblock - * - * Flushes the log to disk. - */ -static int gfs2_sync_fs(struct super_block *sb, int wait) -{ - sb->s_dirt = 0; - if (wait) - gfs2_log_flush(sb->s_fs_info, NULL); - return 0; -} - -/** - * gfs2_write_super_lockfs - prevent further writes to the filesystem - * @sb: the VFS structure for the filesystem - * - */ - -static void gfs2_write_super_lockfs(struct super_block *sb) -{ - struct gfs2_sbd *sdp = sb->s_fs_info; - int error; - - if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) - return; - - for (;;) { - error = gfs2_freeze_fs(sdp); - if (!error) - break; - - switch (error) { - case -EBUSY: - fs_err(sdp, "waiting for recovery before freeze\n"); - break; - - default: - fs_err(sdp, "error freezing FS: %d\n", error); - break; - } - - fs_err(sdp, "retrying...\n"); - msleep(1000); - } -} - -/** - * gfs2_unlockfs - reallow writes to the filesystem - * @sb: the VFS structure for the filesystem - * - */ - -static void gfs2_unlockfs(struct super_block *sb) -{ - gfs2_unfreeze_fs(sb->s_fs_info); -} - -/** - * gfs2_statfs - Gather and return stats about the filesystem - * @sb: The superblock - * @statfsbuf: The buffer - * - * Returns: 0 on success or error code - */ - -static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) -{ - struct super_block *sb = dentry->d_inode->i_sb; - struct gfs2_sbd *sdp = sb->s_fs_info; - struct gfs2_statfs_change_host sc; - int error; - - if (gfs2_tune_get(sdp, gt_statfs_slow)) - error = gfs2_statfs_slow(sdp, &sc); - else - error = gfs2_statfs_i(sdp, &sc); - - if (error) - return error; - - buf->f_type = GFS2_MAGIC; - buf->f_bsize = sdp->sd_sb.sb_bsize; - buf->f_blocks = sc.sc_total; - buf->f_bfree = sc.sc_free; - buf->f_bavail = sc.sc_free; - buf->f_files = sc.sc_dinodes + sc.sc_free; - buf->f_ffree = sc.sc_free; - buf->f_namelen = GFS2_FNAMESIZE; - - return 0; -} - -/** - * gfs2_remount_fs - called when the FS is remounted - * @sb: the filesystem - * @flags: the remount flags - * @data: extra data passed in (not used right now) - * - * Returns: errno - */ - -static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data) -{ - struct gfs2_sbd *sdp = sb->s_fs_info; - int error; - - error = gfs2_mount_args(sdp, data, 1); - if (error) - return error; - - if (sdp->sd_args.ar_spectator) - *flags |= MS_RDONLY; - else { - if (*flags & MS_RDONLY) { - if (!(sb->s_flags & MS_RDONLY)) - error = gfs2_make_fs_ro(sdp); - } else if (!(*flags & MS_RDONLY) && - (sb->s_flags & MS_RDONLY)) { - error = gfs2_make_fs_rw(sdp); - } - } - - if (*flags & (MS_NOATIME | MS_NODIRATIME)) - set_bit(SDF_NOATIME, &sdp->sd_flags); - else - clear_bit(SDF_NOATIME, &sdp->sd_flags); - - /* Don't let the VFS update atimes. GFS2 handles this itself. */ - *flags |= MS_NOATIME | MS_NODIRATIME; - - return error; -} - -/** - * gfs2_drop_inode - Drop an inode (test for remote unlink) - * @inode: The inode to drop - * - * If we've received a callback on an iopen lock then its because a - * remote node tried to deallocate the inode but failed due to this node - * still having the inode open. Here we mark the link count zero - * since we know that it must have reached zero if the GLF_DEMOTE flag - * is set on the iopen glock. If we didn't do a disk read since the - * remote node removed the final link then we might otherwise miss - * this event. This check ensures that this node will deallocate the - * inode's blocks, or alternatively pass the baton on to another - * node for later deallocation. - */ -static void gfs2_drop_inode(struct inode *inode) -{ - if (inode->i_private && inode->i_nlink) { - struct gfs2_inode *ip = GFS2_I(inode); - struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; - if (gl && test_bit(GLF_DEMOTE, &gl->gl_flags)) - clear_nlink(inode); - } - generic_drop_inode(inode); -} - -/** - * gfs2_clear_inode - Deallocate an inode when VFS is done with it - * @inode: The VFS inode - * - */ - -static void gfs2_clear_inode(struct inode *inode) -{ - /* This tells us its a "real" inode and not one which only - * serves to contain an address space (see rgrp.c, meta_io.c) - * which therefore doesn't have its own glocks. - */ - if (inode->i_private) { - struct gfs2_inode *ip = GFS2_I(inode); - ip->i_gl->gl_object = NULL; - gfs2_glock_schedule_for_reclaim(ip->i_gl); - gfs2_glock_put(ip->i_gl); - ip->i_gl = NULL; - if (ip->i_iopen_gh.gh_gl) { - ip->i_iopen_gh.gh_gl->gl_object = NULL; - gfs2_glock_dq_uninit(&ip->i_iopen_gh); - } - } -} - -/** - * gfs2_show_options - Show mount options for /proc/mounts - * @s: seq_file structure - * @mnt: vfsmount - * - * Returns: 0 on success or error code - */ - -static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt) -{ - struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info; - struct gfs2_args *args = &sdp->sd_args; - - if (args->ar_lockproto[0]) - seq_printf(s, ",lockproto=%s", args->ar_lockproto); - if (args->ar_locktable[0]) - seq_printf(s, ",locktable=%s", args->ar_locktable); - if (args->ar_hostdata[0]) - seq_printf(s, ",hostdata=%s", args->ar_hostdata); - if (args->ar_spectator) - seq_printf(s, ",spectator"); - if (args->ar_ignore_local_fs) - seq_printf(s, ",ignore_local_fs"); - if (args->ar_localflocks) - seq_printf(s, ",localflocks"); - if (args->ar_localcaching) - seq_printf(s, ",localcaching"); - if (args->ar_debug) - seq_printf(s, ",debug"); - if (args->ar_upgrade) - seq_printf(s, ",upgrade"); - if (args->ar_num_glockd != GFS2_GLOCKD_DEFAULT) - seq_printf(s, ",num_glockd=%u", args->ar_num_glockd); - if (args->ar_posix_acl) - seq_printf(s, ",acl"); - if (args->ar_quota != GFS2_QUOTA_DEFAULT) { - char *state; - switch (args->ar_quota) { - case GFS2_QUOTA_OFF: - state = "off"; - break; - case GFS2_QUOTA_ACCOUNT: - state = "account"; - break; - case GFS2_QUOTA_ON: - state = "on"; - break; - default: - state = "unknown"; - break; - } - seq_printf(s, ",quota=%s", state); - } - if (args->ar_suiddir) - seq_printf(s, ",suiddir"); - if (args->ar_data != GFS2_DATA_DEFAULT) { - char *state; - switch (args->ar_data) { - case GFS2_DATA_WRITEBACK: - state = "writeback"; - break; - case GFS2_DATA_ORDERED: - state = "ordered"; - break; - default: - state = "unknown"; - break; - } - seq_printf(s, ",data=%s", state); - } - - return 0; -} - -/* - * We have to (at the moment) hold the inodes main lock to cover - * the gap between unlocking the shared lock on the iopen lock and - * taking the exclusive lock. I'd rather do a shared -> exclusive - * conversion on the iopen lock, but we can change that later. This - * is safe, just less efficient. - */ -static void gfs2_delete_inode(struct inode *inode) -{ - struct gfs2_sbd *sdp = inode->i_sb->s_fs_info; - struct gfs2_inode *ip = GFS2_I(inode); - struct gfs2_holder gh; - int error; - - if (!inode->i_private) - goto out; - - error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); - if (unlikely(error)) { - gfs2_glock_dq_uninit(&ip->i_iopen_gh); - goto out; - } - - gfs2_glock_dq_wait(&ip->i_iopen_gh); - gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh); - error = gfs2_glock_nq(&ip->i_iopen_gh); - if (error) - goto out_uninit; - - if (S_ISDIR(inode->i_mode) && - (ip->i_di.di_flags & GFS2_DIF_EXHASH)) { - error = gfs2_dir_exhash_dealloc(ip); - if (error) - goto out_unlock; - } - - if (ip->i_di.di_eattr) { - error = gfs2_ea_dealloc(ip); - if (error) - goto out_unlock; - } - - if (!gfs2_is_stuffed(ip)) { - error = gfs2_file_dealloc(ip); - if (error) - goto out_unlock; - } - - error = gfs2_dinode_dealloc(ip); - if (error) - goto out_unlock; - - error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); - if (error) - goto out_unlock; - /* Needs to be done before glock release & also in a transaction */ - truncate_inode_pages(&inode->i_data, 0); - gfs2_trans_end(sdp); - -out_unlock: - gfs2_glock_dq(&ip->i_iopen_gh); -out_uninit: - gfs2_holder_uninit(&ip->i_iopen_gh); - gfs2_glock_dq_uninit(&gh); - if (error && error != GLR_TRYFAILED) - fs_warn(sdp, "gfs2_delete_inode: %d\n", error); -out: - truncate_inode_pages(&inode->i_data, 0); - clear_inode(inode); -} - - - -static struct inode *gfs2_alloc_inode(struct super_block *sb) -{ - struct gfs2_inode *ip; - - ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); - if (ip) { - ip->i_flags = 0; - ip->i_gl = NULL; - } - return &ip->i_inode; -} - -static void gfs2_destroy_inode(struct inode *inode) -{ - kmem_cache_free(gfs2_inode_cachep, inode); -} - -const struct super_operations gfs2_super_ops = { - .alloc_inode = gfs2_alloc_inode, - .destroy_inode = gfs2_destroy_inode, - .write_inode = gfs2_write_inode, - .delete_inode = gfs2_delete_inode, - .put_super = gfs2_put_super, - .write_super = gfs2_write_super, - .sync_fs = gfs2_sync_fs, - .write_super_lockfs = gfs2_write_super_lockfs, - .unlockfs = gfs2_unlockfs, - .statfs = gfs2_statfs, - .remount_fs = gfs2_remount_fs, - .clear_inode = gfs2_clear_inode, - .drop_inode = gfs2_drop_inode, - .show_options = gfs2_show_options, -}; - |