* of the GNU General Public License version 2.
*/
+#include <linux/module.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/gfs2_ondisk.h>
#include <linux/crc32.h>
-#include <linux/lm_interface.h>
+#include <linux/slow-work.h>
#include "gfs2.h"
#include "incore.h"
#include "bmap.h"
#include "glock.h"
#include "glops.h"
-#include "lm.h"
#include "lops.h"
#include "meta_io.h"
#include "recovery.h"
return 0;
}
- rr = kmalloc(sizeof(struct gfs2_revoke_replay), GFP_KERNEL);
+ rr = kmalloc(sizeof(struct gfs2_revoke_replay), GFP_NOFS);
if (!rr)
return -ENOMEM;
}
}
+static int gfs2_log_header_in(struct gfs2_log_header_host *lh, const void *buf)
+{
+ const struct gfs2_log_header *str = buf;
+
+ if (str->lh_header.mh_magic != cpu_to_be32(GFS2_MAGIC) ||
+ str->lh_header.mh_type != cpu_to_be32(GFS2_METATYPE_LH))
+ return 1;
+
+ lh->lh_sequence = be64_to_cpu(str->lh_sequence);
+ lh->lh_flags = be32_to_cpu(str->lh_flags);
+ lh->lh_tail = be32_to_cpu(str->lh_tail);
+ lh->lh_blkno = be32_to_cpu(str->lh_blkno);
+ lh->lh_hash = be32_to_cpu(str->lh_hash);
+ return 0;
+}
+
/**
* get_log_header - read the log header for a given segment
* @jd: the journal
struct gfs2_log_header_host *head)
{
struct buffer_head *bh;
- struct gfs2_log_header_host lh;
+ struct gfs2_log_header_host uninitialized_var(lh);
const u32 nothing = 0;
u32 hash;
int error;
sizeof(u32));
hash = crc32_le(hash, (unsigned char const *)¬hing, sizeof(nothing));
hash ^= (u32)~0;
- gfs2_log_header_in(&lh, bh->b_data);
+ error = gfs2_log_header_in(&lh, bh->b_data);
brelse(bh);
- if (lh.lh_header.mh_magic != GFS2_MAGIC ||
- lh.lh_header.mh_type != GFS2_METATYPE_LH ||
- lh.lh_blkno != blk || lh.lh_hash != hash)
+ if (error || lh.lh_blkno != blk || lh.lh_hash != hash)
return 1;
*head = lh;
lblock = head->lh_blkno;
gfs2_replay_incr_blk(sdp, &lblock);
bh_map.b_size = 1 << ip->i_inode.i_blkbits;
- error = gfs2_block_map(&ip->i_inode, lblock, 0, &bh_map);
+ error = gfs2_block_map(&ip->i_inode, lblock, &bh_map, 0);
if (error)
return error;
if (!bh_map.b_blocknr) {
return error;
}
-/**
- * gfs2_recover_journal - recovery a given journal
- * @jd: the struct gfs2_jdesc describing the journal
- *
- * Acquire the journal's lock, check to see if the journal is clean, and
- * do recovery if necessary.
- *
- * Returns: errno
- */
-int gfs2_recover_journal(struct gfs2_jdesc *jd)
+static void gfs2_recovery_done(struct gfs2_sbd *sdp, unsigned int jid,
+ unsigned int message)
+{
+ char env_jid[20];
+ char env_status[20];
+ char *envp[] = { env_jid, env_status, NULL };
+ struct lm_lockstruct *ls = &sdp->sd_lockstruct;
+ ls->ls_recover_jid_done = jid;
+ ls->ls_recover_jid_status = message;
+ sprintf(env_jid, "JID=%d", jid);
+ sprintf(env_status, "RECOVERY=%s",
+ message == LM_RD_SUCCESS ? "Done" : "Failed");
+ kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp);
+}
+
+static int gfs2_recover_get_ref(struct slow_work *work)
+{
+ struct gfs2_jdesc *jd = container_of(work, struct gfs2_jdesc, jd_work);
+ if (test_and_set_bit(JDF_RECOVERY, &jd->jd_flags))
+ return -EBUSY;
+ return 0;
+}
+
+static void gfs2_recover_put_ref(struct slow_work *work)
{
+ struct gfs2_jdesc *jd = container_of(work, struct gfs2_jdesc, jd_work);
+ clear_bit(JDF_RECOVERY, &jd->jd_flags);
+ smp_mb__after_clear_bit();
+ wake_up_bit(&jd->jd_flags, JDF_RECOVERY);
+}
+
+static void gfs2_recover_work(struct slow_work *work)
+{
+ struct gfs2_jdesc *jd = container_of(work, struct gfs2_jdesc, jd_work);
struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
struct gfs2_log_header_host head;
fs_info(sdp, "jid=%u: Trying to acquire journal lock...\n",
jd->jd_jid);
- /* Aquire the journal lock so we can do recovery */
+ /* Acquire the journal lock so we can do recovery */
error = gfs2_glock_nq_num(sdp, jd->jd_jid, &gfs2_journal_glops,
LM_ST_EXCLUSIVE,
};
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
- LM_FLAG_NOEXP, &ji_gh);
+ LM_FLAG_NOEXP | GL_NOCACHE, &ji_gh);
if (error)
goto fail_gunlock_j;
} else {
error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED,
LM_FLAG_NOEXP | LM_FLAG_PRIORITY |
- GL_NOCANCEL | GL_NOCACHE, &t_gh);
+ GL_NOCACHE, &t_gh);
if (error)
goto fail_gunlock_ji;
if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))
ro = 1;
} else {
- if (sdp->sd_vfs->s_flags & MS_RDONLY)
- ro = 1;
+ if (sdp->sd_vfs->s_flags & MS_RDONLY) {
+ /* check if device itself is read-only */
+ ro = bdev_read_only(sdp->sd_vfs->s_bdev);
+ if (!ro) {
+ fs_info(sdp, "recovery required on "
+ "read-only filesystem.\n");
+ fs_info(sdp, "write access will be "
+ "enabled during recovery.\n");
+ }
+ }
}
if (ro) {
- fs_warn(sdp, "jid=%u: Can't replay: read-only FS\n",
- jd->jd_jid);
+ fs_warn(sdp, "jid=%u: Can't replay: read-only block "
+ "device\n", jd->jd_jid);
error = -EROFS;
goto fail_gunlock_tr;
}
if (jd->jd_jid != sdp->sd_lockstruct.ls_jid)
gfs2_glock_dq_uninit(&ji_gh);
- gfs2_lm_recovery_done(sdp, jd->jd_jid, LM_RD_SUCCESS);
+ gfs2_recovery_done(sdp, jd->jd_jid, LM_RD_SUCCESS);
if (jd->jd_jid != sdp->sd_lockstruct.ls_jid)
gfs2_glock_dq_uninit(&j_gh);
fs_info(sdp, "jid=%u: Done\n", jd->jd_jid);
- return 0;
+ return;
fail_gunlock_tr:
gfs2_glock_dq_uninit(&t_gh);
fs_info(sdp, "jid=%u: %s\n", jd->jd_jid, (error) ? "Failed" : "Done");
fail:
- gfs2_lm_recovery_done(sdp, jd->jd_jid, LM_RD_GAVEUP);
- return error;
+ gfs2_recovery_done(sdp, jd->jd_jid, LM_RD_GAVEUP);
}
-/**
- * gfs2_check_journals - Recover any dirty journals
- * @sdp: the filesystem
- *
- */
+struct slow_work_ops gfs2_recover_ops = {
+ .owner = THIS_MODULE,
+ .get_ref = gfs2_recover_get_ref,
+ .put_ref = gfs2_recover_put_ref,
+ .execute = gfs2_recover_work,
+};
-void gfs2_check_journals(struct gfs2_sbd *sdp)
-{
- struct gfs2_jdesc *jd;
- for (;;) {
- jd = gfs2_jdesc_find_dirty(sdp);
- if (!jd)
- break;
+static int gfs2_recovery_wait(void *word)
+{
+ schedule();
+ return 0;
+}
- if (jd != sdp->sd_jdesc)
- gfs2_recover_journal(jd);
- }
+int gfs2_recover_journal(struct gfs2_jdesc *jd)
+{
+ int rv;
+ rv = slow_work_enqueue(&jd->jd_work);
+ if (rv)
+ return rv;
+ wait_on_bit(&jd->jd_flags, JDF_RECOVERY, gfs2_recovery_wait, TASK_UNINTERRUPTIBLE);
+ return 0;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff