holdtime = gl->gl_tchange + gl->gl_ops->go_min_hold_time;
if (time_before(now, holdtime))
delay = holdtime - now;
+ if (test_bit(GLF_REPLY_PENDING, &gl->gl_flags))
+ delay = gl->gl_ops->go_min_hold_time;
spin_lock(&gl->gl_spin);
handle_callback(gl, state, 1, delay);
*p++ = 'a';
if (flags & GL_EXACT)
*p++ = 'E';
- if (flags & GL_ATIME)
- *p++ = 'a';
if (flags & GL_NOCACHE)
*p++ = 'c';
if (test_bit(HIF_HOLDER, &iflags))
if (gl) {
gi->gl = hlist_entry(gl->gl_list.next,
struct gfs2_glock, gl_list);
- if (gi->gl)
- gfs2_glock_hold(gi->gl);
+ } else {
+ gi->gl = hlist_entry(gl_hash_table[gi->hash].hb_list.first,
+ struct gfs2_glock, gl_list);
}
+ if (gi->gl)
+ gfs2_glock_hold(gi->gl);
read_unlock(gl_lock_addr(gi->hash));
if (gl)
gfs2_glock_put(gl);
- if (gl && gi->gl == NULL)
- gi->hash++;
while (gi->gl == NULL) {
+ gi->hash++;
if (gi->hash >= GFS2_GL_HASH_SIZE)
return 1;
read_lock(gl_lock_addr(gi->hash));
if (gi->gl)
gfs2_glock_hold(gi->gl);
read_unlock(gl_lock_addr(gi->hash));
- gi->hash++;
}
if (gi->sdp != gi->gl->gl_sbd)
#define GL_ASYNC 0x00000040
#define GL_EXACT 0x00000080
#define GL_SKIP 0x00000100
-#define GL_ATIME 0x00000200
#define GL_NOCACHE 0x00000400
#define GLR_TRYFAILED 13
#define GFS2_DATA_ORDERED 2
struct gfs2_args {
- char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
- char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
- char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
- int ar_spectator; /* Don't get a journal because we're always RO */
- int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
- int ar_localflocks; /* Let the VFS do flock|fcntl locks for us */
- int ar_localcaching; /* Local-style caching (dangerous on multihost) */
- int ar_debug; /* Oops on errors instead of trying to be graceful */
- int ar_upgrade; /* Upgrade ondisk/multihost format */
- unsigned int ar_num_glockd; /* Number of glockd threads */
- int ar_posix_acl; /* Enable posix acls */
- int ar_quota; /* off/account/on */
- int ar_suiddir; /* suiddir support */
- int ar_data; /* ordered/writeback */
+ char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
+ char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
+ char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
+ unsigned int ar_spectator:1; /* Don't get a journal */
+ unsigned int ar_ignore_local_fs:1; /* Ignore optimisations */
+ unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
+ unsigned int ar_localcaching:1; /* Local caching */
+ unsigned int ar_debug:1; /* Oops on errors */
+ unsigned int ar_upgrade:1; /* Upgrade ondisk format */
+ unsigned int ar_posix_acl:1; /* Enable posix acls */
+ unsigned int ar_quota:2; /* off/account/on */
+ unsigned int ar_suiddir:1; /* suiddir support */
+ unsigned int ar_data:2; /* ordered/writeback */
+ unsigned int ar_meta:1; /* mount metafs */
+ unsigned int ar_num_glockd; /* Number of glockd threads */
};
struct gfs2_tune {
unsigned int gt_quota_scale_den; /* Denominator */
unsigned int gt_quota_cache_secs;
unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
- unsigned int gt_atime_quantum; /* Min secs between atime updates */
unsigned int gt_new_files_jdata;
unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
unsigned int gt_stall_secs; /* Detects trouble! */
SDF_JOURNAL_CHECKED = 0,
SDF_JOURNAL_LIVE = 1,
SDF_SHUTDOWN = 2,
- SDF_NOATIME = 3,
+ SDF_NOBARRIERS = 3,
};
#define GFS2_FSNAME_LEN 256
struct gfs2_sbd {
struct super_block *sd_vfs;
- struct super_block *sd_vfs_meta;
struct kobject sd_kobj;
unsigned long sd_flags; /* SDF_... */
struct gfs2_sb_host sd_sb;
/* Inode Stuff */
- struct inode *sd_master_dir;
+ struct dentry *sd_master_dir;
+ struct dentry *sd_root_dir;
+
struct inode *sd_jindex;
struct inode *sd_inum_inode;
struct inode *sd_statfs_inode;
/* Debugging crud */
unsigned long sd_last_warning;
- struct vfsmount *sd_gfs2mnt;
struct dentry *debugfs_dir; /* debugfs directory */
struct dentry *debugfs_dentry_glocks; /* for debugfs */
};
#include <linux/crc32.h>
#include <linux/lm_interface.h>
#include <linux/security.h>
+#include <linux/time.h>
#include "gfs2.h"
#include "incore.h"
{
struct gfs2_dinode_host *di = &ip->i_di;
const struct gfs2_dinode *str = buf;
+ struct timespec atime;
u16 height, depth;
if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
di->di_size = be64_to_cpu(str->di_size);
i_size_write(&ip->i_inode, di->di_size);
gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
- ip->i_inode.i_atime.tv_sec = be64_to_cpu(str->di_atime);
- ip->i_inode.i_atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
+ atime.tv_sec = be64_to_cpu(str->di_atime);
+ atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
+ if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
+ ip->i_inode.i_atime = atime;
ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
if (bh)
brelse(bh);
- if (!inode)
- return ERR_PTR(-ENOMEM);
return inode;
fail_gunlock2:
gfs2_glock_dq_uninit(ghs + 1);
- if (inode)
+ if (inode && !IS_ERR(inode))
iput(inode);
fail_gunlock:
gfs2_glock_dq(ghs);
return 0;
}
-/*
- * gfs2_ok_to_move - check if it's ok to move a directory to another directory
- * @this: move this
- * @to: to here
- *
- * Follow @to back to the root and make sure we don't encounter @this
- * Assumes we already hold the rename lock.
- *
- * Returns: errno
- */
-
-int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
-{
- struct inode *dir = &to->i_inode;
- struct super_block *sb = dir->i_sb;
- struct inode *tmp;
- struct qstr dotdot;
- int error = 0;
-
- gfs2_str2qstr(&dotdot, "..");
-
- igrab(dir);
-
- for (;;) {
- if (dir == &this->i_inode) {
- error = -EINVAL;
- break;
- }
- if (dir == sb->s_root->d_inode) {
- error = 0;
- break;
- }
-
- tmp = gfs2_lookupi(dir, &dotdot, 1);
- if (IS_ERR(tmp)) {
- error = PTR_ERR(tmp);
- break;
- }
-
- iput(dir);
- dir = tmp;
- }
-
- iput(dir);
-
- return error;
-}
-
/**
* gfs2_readlinki - return the contents of a symlink
* @ip: the symlink's inode
unsigned int x;
int error;
- gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh);
- error = gfs2_glock_nq_atime(&i_gh);
+ gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
+ error = gfs2_glock_nq(&i_gh);
if (error) {
gfs2_holder_uninit(&i_gh);
return error;
return error;
}
-/**
- * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and
- * conditionally update the inode's atime
- * @gh: the holder to acquire
- *
- * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap
- * Update if the difference between the current time and the inode's current
- * atime is greater than an interval specified at mount.
- *
- * Returns: errno
- */
-
-int gfs2_glock_nq_atime(struct gfs2_holder *gh)
-{
- struct gfs2_glock *gl = gh->gh_gl;
- struct gfs2_sbd *sdp = gl->gl_sbd;
- struct gfs2_inode *ip = gl->gl_object;
- s64 quantum = gfs2_tune_get(sdp, gt_atime_quantum);
- unsigned int state;
- int flags;
- int error;
- struct timespec tv = CURRENT_TIME;
-
- if (gfs2_assert_warn(sdp, gh->gh_flags & GL_ATIME) ||
- gfs2_assert_warn(sdp, !(gh->gh_flags & GL_ASYNC)) ||
- gfs2_assert_warn(sdp, gl->gl_ops == &gfs2_inode_glops))
- return -EINVAL;
-
- state = gh->gh_state;
- flags = gh->gh_flags;
-
- error = gfs2_glock_nq(gh);
- if (error)
- return error;
-
- if (test_bit(SDF_NOATIME, &sdp->sd_flags) ||
- (sdp->sd_vfs->s_flags & MS_RDONLY))
- return 0;
-
- if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) {
- gfs2_glock_dq(gh);
- gfs2_holder_reinit(LM_ST_EXCLUSIVE, gh->gh_flags & ~LM_FLAG_ANY,
- gh);
- error = gfs2_glock_nq(gh);
- if (error)
- return error;
-
- /* Verify that atime hasn't been updated while we were
- trying to get exclusive lock. */
-
- tv = CURRENT_TIME;
- if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) {
- struct buffer_head *dibh;
- struct gfs2_dinode *di;
-
- error = gfs2_trans_begin(sdp, RES_DINODE, 0);
- if (error == -EROFS)
- return 0;
- if (error)
- goto fail;
-
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (error)
- goto fail_end_trans;
-
- ip->i_inode.i_atime = tv;
-
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- di = (struct gfs2_dinode *)dibh->b_data;
- di->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
- di->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
- brelse(dibh);
-
- gfs2_trans_end(sdp);
- }
-
- /* If someone else has asked for the glock,
- unlock and let them have it. Then reacquire
- in the original state. */
- if (gfs2_glock_is_blocking(gl)) {
- gfs2_glock_dq(gh);
- gfs2_holder_reinit(state, flags, gh);
- return gfs2_glock_nq(gh);
- }
- }
-
- return 0;
-
-fail_end_trans:
- gfs2_trans_end(sdp);
-fail:
- gfs2_glock_dq(gh);
- return error;
-}
-
static int
__gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
{
int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
const struct gfs2_inode *ip);
int gfs2_permission(struct inode *inode, int mask);
-int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to);
int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len);
-int gfs2_glock_nq_atime(struct gfs2_holder *gh);
int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr);
struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
+#include <linux/bio.h>
#include "gfs2.h"
#include "incore.h"
memset(bh->b_data, 0, bh->b_size);
set_buffer_uptodate(bh);
clear_buffer_dirty(bh);
- unlock_buffer(bh);
gfs2_ail1_empty(sdp, 0);
tail = current_tail(sdp);
hash = gfs2_disk_hash(bh->b_data, sizeof(struct gfs2_log_header));
lh->lh_hash = cpu_to_be32(hash);
- set_buffer_dirty(bh);
- if (sync_dirty_buffer(bh))
+ bh->b_end_io = end_buffer_write_sync;
+ if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
+ goto skip_barrier;
+ get_bh(bh);
+ submit_bh(WRITE_BARRIER | (1 << BIO_RW_META), bh);
+ wait_on_buffer(bh);
+ if (buffer_eopnotsupp(bh)) {
+ clear_buffer_eopnotsupp(bh);
+ set_buffer_uptodate(bh);
+ set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
+ lock_buffer(bh);
+skip_barrier:
+ get_bh(bh);
+ submit_bh(WRITE_SYNC | (1 << BIO_RW_META), bh);
+ wait_on_buffer(bh);
+ }
+ if (!buffer_uptodate(bh))
gfs2_io_error_bh(sdp, bh);
brelse(bh);
Opt_nosuiddir,
Opt_data_writeback,
Opt_data_ordered,
+ Opt_meta,
Opt_err,
};
{Opt_nosuiddir, "nosuiddir"},
{Opt_data_writeback, "data=writeback"},
{Opt_data_ordered, "data=ordered"},
+ {Opt_meta, "meta"},
{Opt_err, NULL}
};
case Opt_data_ordered:
args->ar_data = GFS2_DATA_ORDERED;
break;
+ case Opt_meta:
+ if (remount && args->ar_meta != 1)
+ goto cant_remount;
+ args->ar_meta = 1;
+ break;
case Opt_err:
default:
fs_info(sdp, "unknown option: %s\n", o);
int error;
unlock_page(page);
- gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh);
- error = gfs2_glock_nq_atime(&gh);
+ gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
+ error = gfs2_glock_nq(&gh);
if (unlikely(error))
goto out;
error = AOP_TRUNCATED_PAGE;
struct gfs2_holder gh;
int ret;
- gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh);
- ret = gfs2_glock_nq_atime(&gh);
+ gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
+ ret = gfs2_glock_nq(&gh);
if (unlikely(ret))
goto out_uninit;
if (!gfs2_is_stuffed(ip))
unsigned to = from + len;
struct page *page;
- gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ATIME, &ip->i_gh);
- error = gfs2_glock_nq_atime(&ip->i_gh);
+ gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &ip->i_gh);
+ error = gfs2_glock_nq(&ip->i_gh);
if (unlikely(error))
goto out_uninit;
if (gfs2_is_stuffed(ip))
return 0;
- if (offset > i_size_read(&ip->i_inode))
+ if (offset >= i_size_read(&ip->i_inode))
return 0;
return 1;
}
* unfortunately have the option of only flushing a range like
* the VFS does.
*/
- gfs2_holder_init(ip->i_gl, LM_ST_DEFERRED, GL_ATIME, &gh);
- rv = gfs2_glock_nq_atime(&gh);
+ gfs2_holder_init(ip->i_gl, LM_ST_DEFERRED, 0, &gh);
+ rv = gfs2_glock_nq(&gh);
if (rv)
return rv;
rv = gfs2_ok_for_dio(ip, rw, offset);
u64 offset = file->f_pos;
int error;
- gfs2_holder_init(dip->i_gl, LM_ST_SHARED, GL_ATIME, &d_gh);
- error = gfs2_glock_nq_atime(&d_gh);
+ gfs2_holder_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
+ error = gfs2_glock_nq(&d_gh);
if (error) {
gfs2_holder_uninit(&d_gh);
return error;
int error;
u32 fsflags;
- gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh);
- error = gfs2_glock_nq_atime(&gh);
+ gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
+ error = gfs2_glock_nq(&gh);
if (error)
return error;
struct gfs2_alloc *al;
int ret;
- gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ATIME, &gh);
- ret = gfs2_glock_nq_atime(&gh);
+ gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
+ ret = gfs2_glock_nq(&gh);
if (ret)
goto out;
struct gfs2_holder i_gh;
int error;
- gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh);
- error = gfs2_glock_nq_atime(&i_gh);
+ gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
+ error = gfs2_glock_nq(&i_gh);
if (error) {
gfs2_holder_uninit(&i_gh);
return error;
#define DO 0
#define UNDO 1
+static const u32 gfs2_old_fs_formats[] = {
+ 0
+};
+
+static const u32 gfs2_old_multihost_formats[] = {
+ 0
+};
+
+/**
+ * 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);
+
+ gt->gt_demote_secs = 300;
+ gt->gt_incore_log_blocks = 1024;
+ gt->gt_log_flush_secs = 60;
+ gt->gt_recoverd_secs = 60;
+ gt->gt_logd_secs = 1;
+ gt->gt_quotad_secs = 5;
+ gt->gt_quota_simul_sync = 64;
+ gt->gt_quota_warn_period = 10;
+ gt->gt_quota_scale_num = 1;
+ gt->gt_quota_scale_den = 1;
+ gt->gt_quota_cache_secs = 300;
+ gt->gt_quota_quantum = 60;
+ gt->gt_new_files_jdata = 0;
+ gt->gt_max_readahead = 1 << 18;
+ gt->gt_stall_secs = 600;
+ gt->gt_complain_secs = 10;
+ gt->gt_statfs_quantum = 30;
+ gt->gt_statfs_slow = 0;
+}
+
static struct gfs2_sbd *init_sbd(struct super_block *sb)
{
struct gfs2_sbd *sdp;
return sdp;
}
-static void init_vfs(struct super_block *sb, unsigned noatime)
+
+/**
+ * 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.
+ */
+
+static int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb_host *sb, int silent)
{
- struct gfs2_sbd *sdp = sb->s_fs_info;
+ unsigned int x;
- sb->s_magic = GFS2_MAGIC;
- sb->s_op = &gfs2_super_ops;
- sb->s_export_op = &gfs2_export_ops;
- sb->s_time_gran = 1;
- sb->s_maxbytes = MAX_LFS_FILESIZE;
+ if (sb->sb_magic != GFS2_MAGIC ||
+ sb->sb_type != GFS2_METATYPE_SB) {
+ if (!silent)
+ printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n");
+ 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;
+
+ if (sb->sb_fs_format != GFS2_FORMAT_FS) {
+ for (x = 0; gfs2_old_fs_formats[x]; x++)
+ if (gfs2_old_fs_formats[x] == sb->sb_fs_format)
+ break;
+
+ if (!gfs2_old_fs_formats[x]) {
+ printk(KERN_WARNING
+ "GFS2: code version (%u, %u) is incompatible "
+ "with ondisk format (%u, %u)\n",
+ GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
+ sb->sb_fs_format, sb->sb_multihost_format);
+ printk(KERN_WARNING
+ "GFS2: I don't know how to upgrade this FS\n");
+ return -EINVAL;
+ }
+ }
+
+ if (sb->sb_multihost_format != GFS2_FORMAT_MULTI) {
+ for (x = 0; gfs2_old_multihost_formats[x]; x++)
+ if (gfs2_old_multihost_formats[x] ==
+ sb->sb_multihost_format)
+ break;
+
+ if (!gfs2_old_multihost_formats[x]) {
+ printk(KERN_WARNING
+ "GFS2: code version (%u, %u) is incompatible "
+ "with ondisk format (%u, %u)\n",
+ GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
+ sb->sb_fs_format, sb->sb_multihost_format);
+ printk(KERN_WARNING
+ "GFS2: I don't know how to upgrade this FS\n");
+ return -EINVAL;
+ }
+ }
+
+ if (!sdp->sd_args.ar_upgrade) {
+ printk(KERN_WARNING
+ "GFS2: code version (%u, %u) is incompatible "
+ "with ondisk format (%u, %u)\n",
+ GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
+ sb->sb_fs_format, sb->sb_multihost_format);
+ printk(KERN_INFO
+ "GFS2: Use the \"upgrade\" mount option to upgrade "
+ "the FS\n");
+ printk(KERN_INFO "GFS2: See the manual for more details\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void end_bio_io_page(struct bio *bio, int error)
+{
+ struct page *page = bio->bi_private;
- if (sb->s_flags & (MS_NOATIME | MS_NODIRATIME))
- set_bit(noatime, &sdp->sd_flags);
+ if (!error)
+ SetPageUptodate(page);
+ else
+ printk(KERN_WARNING "gfs2: error %d reading superblock\n", error);
+ unlock_page(page);
+}
+
+static void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf)
+{
+ 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);
+}
+
+/**
+ * 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
+ */
+
+static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector)
+{
+ 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))
+ return -ENOBUFS;
+
+ ClearPageUptodate(page);
+ ClearPageDirty(page);
+ lock_page(page);
+
+ bio = bio_alloc(GFP_NOFS, 1);
+ if (unlikely(!bio)) {
+ __free_page(page);
+ return -ENOBUFS;
+ }
- /* Don't let the VFS update atimes. GFS2 handles this itself. */
- sb->s_flags |= MS_NOATIME | MS_NODIRATIME;
+ bio->bi_sector = sector * (sb->s_blocksize >> 9);
+ 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;
+ submit_bio(READ_SYNC | (1 << BIO_RW_META), bio);
+ wait_on_page_locked(page);
+ bio_put(bio);
+ if (!PageUptodate(page)) {
+ __free_page(page);
+ return -EIO;
+ }
+ p = kmap(page);
+ gfs2_sb_in(&sdp->sd_sb, p);
+ kunmap(page);
+ __free_page(page);
+ return 0;
+}
+/**
+ * gfs2_read_sb - Read super block
+ * @sdp: The GFS2 superblock
+ * @gl: the glock for the superblock (assumed to be held)
+ * @silent: Don't print message if mount fails
+ *
+ */
+
+static int gfs2_read_sb(struct gfs2_sbd *sdp, struct gfs2_glock *gl, int silent)
+{
+ u32 hash_blocks, ind_blocks, leaf_blocks;
+ u32 tmp_blocks;
+ unsigned int x;
+ int error;
+
+ error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
+ if (error) {
+ if (!silent)
+ fs_err(sdp, "can't read superblock\n");
+ return error;
+ }
+
+ error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
+ if (error)
+ return error;
+
+ 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);
+
+ /* 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);
+
+ return 0;
}
static int init_names(struct gfs2_sbd *sdp, int silent)
return error;
}
-static inline struct inode *gfs2_lookup_root(struct super_block *sb,
- u64 no_addr)
+static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr,
+ u64 no_addr, const char *name)
{
- return gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, 0);
+ struct gfs2_sbd *sdp = sb->s_fs_info;
+ struct dentry *dentry;
+ struct inode *inode;
+
+ inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, 0);
+ if (IS_ERR(inode)) {
+ fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode));
+ return PTR_ERR(inode);
+ }
+ dentry = d_alloc_root(inode);
+ if (!dentry) {
+ fs_err(sdp, "can't alloc %s dentry\n", name);
+ iput(inode);
+ return -ENOMEM;
+ }
+ dentry->d_op = &gfs2_dops;
+ *dptr = dentry;
+ return 0;
}
-static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
+static int init_sb(struct gfs2_sbd *sdp, int silent)
{
struct super_block *sb = sdp->sd_vfs;
struct gfs2_holder sb_gh;
u64 no_addr;
- struct inode *inode;
- int error = 0;
+ int ret;
- if (undo) {
- if (sb->s_root) {
- dput(sb->s_root);
- sb->s_root = NULL;
- }
- return 0;
+ 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\n", ret);
+ return ret;
}
- error = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops,
- LM_ST_SHARED, 0, &sb_gh);
- if (error) {
- fs_err(sdp, "can't acquire superblock glock: %d\n", error);
- return error;
- }
-
- error = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
- if (error) {
- fs_err(sdp, "can't read superblock: %d\n", error);
+ ret = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
+ if (ret) {
+ fs_err(sdp, "can't read superblock: %d\n", ret);
goto out;
}
/* Set up the buffer cache and SB for real */
if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
- error = -EINVAL;
+ ret = -EINVAL;
fs_err(sdp, "FS block size (%u) is too small for device "
"block size (%u)\n",
sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
goto out;
}
if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
- error = -EINVAL;
+ ret = -EINVAL;
fs_err(sdp, "FS block size (%u) is too big for machine "
"page size (%u)\n",
sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
/* Get the root inode */
no_addr = sdp->sd_sb.sb_root_dir.no_addr;
- if (sb->s_type == &gfs2meta_fs_type)
- no_addr = sdp->sd_sb.sb_master_dir.no_addr;
- inode = gfs2_lookup_root(sb, no_addr);
- if (IS_ERR(inode)) {
- error = PTR_ERR(inode);
- fs_err(sdp, "can't read in root inode: %d\n", error);
+ ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root");
+ if (ret)
goto out;
- }
- sb->s_root = d_alloc_root(inode);
- if (!sb->s_root) {
- fs_err(sdp, "can't get root dentry\n");
- error = -ENOMEM;
- iput(inode);
- } else
- sb->s_root->d_op = &gfs2_dops;
-
+ /* 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);
out:
gfs2_glock_dq_uninit(&sb_gh);
- return error;
+ return ret;
}
/**
static int init_journal(struct gfs2_sbd *sdp, int undo)
{
+ struct inode *master = sdp->sd_master_dir->d_inode;
struct gfs2_holder ji_gh;
struct task_struct *p;
struct gfs2_inode *ip;
goto fail_recoverd;
}
- sdp->sd_jindex = gfs2_lookup_simple(sdp->sd_master_dir, "jindex");
+ sdp->sd_jindex = gfs2_lookup_simple(master, "jindex");
if (IS_ERR(sdp->sd_jindex)) {
fs_err(sdp, "can't lookup journal index: %d\n", error);
return PTR_ERR(sdp->sd_jindex);
{
int error = 0;
struct gfs2_inode *ip;
- struct inode *inode;
+ struct inode *master = sdp->sd_master_dir->d_inode;
if (undo)
goto fail_qinode;
- inode = gfs2_lookup_root(sdp->sd_vfs, sdp->sd_sb.sb_master_dir.no_addr);
- if (IS_ERR(inode)) {
- error = PTR_ERR(inode);
- fs_err(sdp, "can't read in master directory: %d\n", error);
- goto fail;
- }
- sdp->sd_master_dir = inode;
-
error = init_journal(sdp, undo);
if (error)
- goto fail_master;
+ goto fail;
/* Read in the master inode number inode */
- sdp->sd_inum_inode = gfs2_lookup_simple(sdp->sd_master_dir, "inum");
+ sdp->sd_inum_inode = gfs2_lookup_simple(master, "inum");
if (IS_ERR(sdp->sd_inum_inode)) {
error = PTR_ERR(sdp->sd_inum_inode);
fs_err(sdp, "can't read in inum inode: %d\n", error);
/* Read in the master statfs inode */
- sdp->sd_statfs_inode = gfs2_lookup_simple(sdp->sd_master_dir, "statfs");
+ sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs");
if (IS_ERR(sdp->sd_statfs_inode)) {
error = PTR_ERR(sdp->sd_statfs_inode);
fs_err(sdp, "can't read in statfs inode: %d\n", error);
}
/* Read in the resource index inode */
- sdp->sd_rindex = gfs2_lookup_simple(sdp->sd_master_dir, "rindex");
+ sdp->sd_rindex = gfs2_lookup_simple(master, "rindex");
if (IS_ERR(sdp->sd_rindex)) {
error = PTR_ERR(sdp->sd_rindex);
fs_err(sdp, "can't get resource index inode: %d\n", error);
sdp->sd_rindex_uptodate = 0;
/* Read in the quota inode */
- sdp->sd_quota_inode = gfs2_lookup_simple(sdp->sd_master_dir, "quota");
+ sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota");
if (IS_ERR(sdp->sd_quota_inode)) {
error = PTR_ERR(sdp->sd_quota_inode);
fs_err(sdp, "can't get quota file inode: %d\n", error);
iput(sdp->sd_inum_inode);
fail_journal:
init_journal(sdp, UNDO);
-fail_master:
- iput(sdp->sd_master_dir);
fail:
return error;
}
char buf[30];
int error = 0;
struct gfs2_inode *ip;
+ struct inode *master = sdp->sd_master_dir->d_inode;
if (sdp->sd_args.ar_spectator)
return 0;
if (undo)
goto fail_qc_gh;
- pn = gfs2_lookup_simple(sdp->sd_master_dir, "per_node");
+ pn = gfs2_lookup_simple(master, "per_node");
if (IS_ERR(pn)) {
error = PTR_ERR(pn);
fs_err(sdp, "can't find per_node directory: %d\n", error);
goto fail;
}
- init_vfs(sb, SDF_NOATIME);
+ sb->s_magic = GFS2_MAGIC;
+ sb->s_op = &gfs2_super_ops;
+ sb->s_export_op = &gfs2_export_ops;
+ sb->s_time_gran = 1;
+ sb->s_maxbytes = MAX_LFS_FILESIZE;
/* Set up the buffer cache and fill in some fake block size values
to allow us to read-in the on-disk superblock. */
if (error)
goto fail_lm;
- error = init_sb(sdp, silent, DO);
+ error = init_sb(sdp, silent);
if (error)
goto fail_locking;
fail_inodes:
init_inodes(sdp, UNDO);
fail_sb:
- init_sb(sdp, 0, UNDO);
+ if (sdp->sd_root_dir)
+ dput(sdp->sd_root_dir);
+ if (sdp->sd_master_dir)
+ dput(sdp->sd_master_dir);
+ sb->s_root = NULL;
fail_locking:
init_locking(sdp, &mount_gh, UNDO);
fail_lm:
}
static int gfs2_get_sb(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data, struct vfsmount *mnt)
+ const char *dev_name, void *data, struct vfsmount *mnt)
{
- struct super_block *sb;
- struct gfs2_sbd *sdp;
- int error = get_sb_bdev(fs_type, flags, dev_name, data, fill_super, mnt);
- if (error)
- goto out;
- sb = mnt->mnt_sb;
- sdp = sb->s_fs_info;
- sdp->sd_gfs2mnt = mnt;
-out:
- return error;
+ return get_sb_bdev(fs_type, flags, dev_name, data, fill_super, mnt);
}
-static int fill_super_meta(struct super_block *sb, struct super_block *new,
- void *data, int silent)
+static struct super_block *get_gfs2_sb(const char *dev_name)
{
- struct gfs2_sbd *sdp = sb->s_fs_info;
- struct inode *inode;
- int error = 0;
-
- new->s_fs_info = sdp;
- sdp->sd_vfs_meta = sb;
-
- init_vfs(new, SDF_NOATIME);
-
- /* Get the master inode */
- inode = igrab(sdp->sd_master_dir);
-
- new->s_root = d_alloc_root(inode);
- if (!new->s_root) {
- fs_err(sdp, "can't get root dentry\n");
- error = -ENOMEM;
- iput(inode);
- } else
- new->s_root->d_op = &gfs2_dops;
-
- return error;
-}
-
-static int set_bdev_super(struct super_block *s, void *data)
-{
- s->s_bdev = data;
- s->s_dev = s->s_bdev->bd_dev;
- return 0;
-}
-
-static int test_bdev_super(struct super_block *s, void *data)
-{
- return s->s_bdev == data;
-}
-
-static struct super_block* get_gfs2_sb(const char *dev_name)
-{
- struct kstat stat;
+ struct super_block *sb;
struct nameidata nd;
- struct super_block *sb = NULL, *s;
int error;
error = path_lookup(dev_name, LOOKUP_FOLLOW, &nd);
if (error) {
- printk(KERN_WARNING "GFS2: path_lookup on %s returned error\n",
- dev_name);
- goto out;
- }
- error = vfs_getattr(nd.path.mnt, nd.path.dentry, &stat);
-
- list_for_each_entry(s, &gfs2_fs_type.fs_supers, s_instances) {
- if ((S_ISBLK(stat.mode) && s->s_dev == stat.rdev) ||
- (S_ISDIR(stat.mode) &&
- s == nd.path.dentry->d_inode->i_sb)) {
- sb = s;
- goto free_nd;
- }
+ printk(KERN_WARNING "GFS2: path_lookup on %s returned error %d\n",
+ dev_name, error);
+ return NULL;
}
-
- printk(KERN_WARNING "GFS2: Unrecognized block device or "
- "mount point %s\n", dev_name);
-
-free_nd:
+ sb = nd.path.dentry->d_inode->i_sb;
+ if (sb && (sb->s_type == &gfs2_fs_type))
+ atomic_inc(&sb->s_active);
+ else
+ sb = NULL;
path_put(&nd.path);
-out:
return sb;
}
static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
const char *dev_name, void *data, struct vfsmount *mnt)
{
- int error = 0;
- struct super_block *sb = NULL, *new;
+ struct super_block *sb = NULL;
struct gfs2_sbd *sdp;
sb = get_gfs2_sb(dev_name);
if (!sb) {
printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
- error = -ENOENT;
- goto error;
+ return -ENOENT;
}
sdp = sb->s_fs_info;
- if (sdp->sd_vfs_meta) {
- printk(KERN_WARNING "GFS2: gfs2meta mount already exists\n");
- error = -EBUSY;
- goto error;
- }
- down(&sb->s_bdev->bd_mount_sem);
- new = sget(fs_type, test_bdev_super, set_bdev_super, sb->s_bdev);
- up(&sb->s_bdev->bd_mount_sem);
- if (IS_ERR(new)) {
- error = PTR_ERR(new);
- goto error;
- }
- new->s_flags = flags;
- strlcpy(new->s_id, sb->s_id, sizeof(new->s_id));
- sb_set_blocksize(new, sb->s_blocksize);
- error = fill_super_meta(sb, new, data, flags & MS_SILENT ? 1 : 0);
- if (error) {
- up_write(&new->s_umount);
- deactivate_super(new);
- goto error;
- }
-
- new->s_flags |= MS_ACTIVE;
-
- /* Grab a reference to the gfs2 mount point */
- atomic_inc(&sdp->sd_gfs2mnt->mnt_count);
- return simple_set_mnt(mnt, new);
-error:
- return error;
+ mnt->mnt_sb = sb;
+ mnt->mnt_root = dget(sdp->sd_master_dir);
+ return 0;
}
static void gfs2_kill_sb(struct super_block *sb)
{
- if (sb->s_fs_info) {
- gfs2_delete_debugfs_file(sb->s_fs_info);
- gfs2_meta_syncfs(sb->s_fs_info);
+ struct gfs2_sbd *sdp = sb->s_fs_info;
+ if (sdp) {
+ gfs2_meta_syncfs(sdp);
+ dput(sdp->sd_root_dir);
+ dput(sdp->sd_master_dir);
+ sdp->sd_root_dir = NULL;
+ sdp->sd_master_dir = NULL;
}
+ shrink_dcache_sb(sb);
kill_block_super(sb);
-}
-
-static void gfs2_kill_sb_meta(struct super_block *sb)
-{
- struct gfs2_sbd *sdp = sb->s_fs_info;
- generic_shutdown_super(sb);
- sdp->sd_vfs_meta = NULL;
- atomic_dec(&sdp->sd_gfs2mnt->mnt_count);
+ if (sdp)
+ gfs2_delete_debugfs_file(sdp);
}
struct file_system_type gfs2_fs_type = {
.name = "gfs2meta",
.fs_flags = FS_REQUIRES_DEV,
.get_sb = gfs2_get_sb_meta,
- .kill_sb = gfs2_kill_sb_meta,
.owner = THIS_MODULE,
};
gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
- error = gfs2_glock_nq_m(2, ghs);
+ error = gfs2_glock_nq(ghs); /* parent */
if (error)
- goto out;
+ goto out_parent;
+
+ error = gfs2_glock_nq(ghs + 1); /* child */
+ if (error)
+ goto out_child;
error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
if (error)
if (alloc_required)
gfs2_alloc_put(dip);
out_gunlock:
- gfs2_glock_dq_m(2, ghs);
-out:
+ gfs2_glock_dq(ghs + 1);
+out_child:
+ gfs2_glock_dq(ghs);
+out_parent:
gfs2_holder_uninit(ghs);
gfs2_holder_uninit(ghs + 1);
if (!error) {
error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
if (error)
- goto out_rgrp;
+ goto out_gunlock;
error = gfs2_trans_begin(sdp, 2*RES_DINODE + RES_LEAF + RES_RG_BIT, 0);
if (error)
out_end_trans:
gfs2_trans_end(sdp);
+out_gunlock:
gfs2_glock_dq(ghs + 2);
out_rgrp:
gfs2_holder_uninit(ghs + 2);
struct gfs2_holder ri_gh;
int error;
-
error = gfs2_rindex_hold(sdp, &ri_gh);
if (error)
return error;
rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
- error = gfs2_glock_nq_m(3, ghs);
+ error = gfs2_glock_nq(ghs); /* parent */
if (error)
- goto out;
+ goto out_parent;
+
+ error = gfs2_glock_nq(ghs + 1); /* child */
+ if (error)
+ goto out_child;
+
+ error = gfs2_glock_nq(ghs + 2); /* rgrp */
+ if (error)
+ goto out_rgrp;
error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
if (error)
gfs2_trans_end(sdp);
out_gunlock:
- gfs2_glock_dq_m(3, ghs);
-out:
- gfs2_holder_uninit(ghs);
- gfs2_holder_uninit(ghs + 1);
+ gfs2_glock_dq(ghs + 2);
+out_rgrp:
gfs2_holder_uninit(ghs + 2);
+ gfs2_glock_dq(ghs + 1);
+out_child:
+ gfs2_holder_uninit(ghs + 1);
+ gfs2_glock_dq(ghs);
+out_parent:
+ gfs2_holder_uninit(ghs);
gfs2_glock_dq_uninit(&ri_gh);
return error;
}
return 0;
}
+/*
+ * gfs2_ok_to_move - check if it's ok to move a directory to another directory
+ * @this: move this
+ * @to: to here
+ *
+ * Follow @to back to the root and make sure we don't encounter @this
+ * Assumes we already hold the rename lock.
+ *
+ * Returns: errno
+ */
+
+static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
+{
+ struct inode *dir = &to->i_inode;
+ struct super_block *sb = dir->i_sb;
+ struct inode *tmp;
+ struct qstr dotdot;
+ int error = 0;
+
+ gfs2_str2qstr(&dotdot, "..");
+
+ igrab(dir);
+
+ for (;;) {
+ if (dir == &this->i_inode) {
+ error = -EINVAL;
+ break;
+ }
+ if (dir == sb->s_root->d_inode) {
+ error = 0;
+ break;
+ }
+
+ tmp = gfs2_lookupi(dir, &dotdot, 1);
+ if (IS_ERR(tmp)) {
+ error = PTR_ERR(tmp);
+ break;
+ }
+
+ iput(dir);
+ dir = tmp;
+ }
+
+ iput(dir);
+
+ return error;
+}
+
/**
* gfs2_rename - Rename a file
* @odir: Parent directory of old file name
struct gfs2_inode *ip = GFS2_I(odentry->d_inode);
struct gfs2_inode *nip = NULL;
struct gfs2_sbd *sdp = GFS2_SB(odir);
- struct gfs2_holder ghs[5], r_gh;
+ struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, };
struct gfs2_rgrpd *nrgd;
unsigned int num_gh;
int dir_rename = 0;
return 0;
}
- /* Make sure we aren't trying to move a dirctory into it's subdir */
-
- if (S_ISDIR(ip->i_inode.i_mode) && odip != ndip) {
- dir_rename = 1;
- error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 0,
- &r_gh);
+ if (odip != ndip) {
+ error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
+ 0, &r_gh);
if (error)
goto out;
- error = gfs2_ok_to_move(ip, ndip);
- if (error)
- goto out_gunlock_r;
+ if (S_ISDIR(ip->i_inode.i_mode)) {
+ dir_rename = 1;
+ /* don't move a dirctory into it's subdir */
+ error = gfs2_ok_to_move(ip, ndip);
+ if (error)
+ goto out_gunlock_r;
+ }
}
num_gh = 1;
gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
}
- error = gfs2_glock_nq_m(num_gh, ghs);
- if (error)
- goto out_uninit;
+ for (x = 0; x < num_gh; x++) {
+ error = gfs2_glock_nq(ghs + x);
+ if (error)
+ goto out_gunlock;
+ }
/* Check out the old directory */
if (alloc_required)
gfs2_alloc_put(ndip);
out_gunlock:
- gfs2_glock_dq_m(num_gh, ghs);
-out_uninit:
- for (x = 0; x < num_gh; x++)
+ while (x--) {
+ gfs2_glock_dq(ghs + x);
gfs2_holder_uninit(ghs + x);
+ }
out_gunlock_r:
- if (dir_rename)
+ if (r_gh.gh_gl)
gfs2_glock_dq_uninit(&r_gh);
out:
return error;
#include <linux/gfs2_ondisk.h>
#include <linux/crc32.h>
#include <linux/lm_interface.h>
+#include <linux/time.h>
#include "gfs2.h"
#include "incore.h"
#include "dir.h"
#include "eattr.h"
#include "bmap.h"
+#include "meta_io.h"
/**
* gfs2_write_inode - Make sure the inode is stable on the disk
static int gfs2_write_inode(struct inode *inode, int sync)
{
struct gfs2_inode *ip = GFS2_I(inode);
-
- /* Check this is a "normal" inode */
- if (test_bit(GIF_USER, &ip->i_flags)) {
- if (current->flags & PF_MEMALLOC)
- return 0;
- if (sync)
- gfs2_log_flush(GFS2_SB(inode), ip->i_gl);
+ struct gfs2_sbd *sdp = GFS2_SB(inode);
+ struct gfs2_holder gh;
+ struct buffer_head *bh;
+ struct timespec atime;
+ struct gfs2_dinode *di;
+ int ret = 0;
+
+ /* Check this is a "normal" inode, etc */
+ if (!test_bit(GIF_USER, &ip->i_flags) ||
+ (current->flags & PF_MEMALLOC))
+ return 0;
+ ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
+ if (ret)
+ goto do_flush;
+ ret = gfs2_trans_begin(sdp, RES_DINODE, 0);
+ if (ret)
+ goto do_unlock;
+ ret = gfs2_meta_inode_buffer(ip, &bh);
+ if (ret == 0) {
+ di = (struct gfs2_dinode *)bh->b_data;
+ atime.tv_sec = be64_to_cpu(di->di_atime);
+ atime.tv_nsec = be32_to_cpu(di->di_atime_nsec);
+ if (timespec_compare(&inode->i_atime, &atime) > 0) {
+ gfs2_trans_add_bh(ip->i_gl, bh, 1);
+ gfs2_dinode_out(ip, bh->b_data);
+ }
+ brelse(bh);
}
+ gfs2_trans_end(sdp);
+do_unlock:
+ gfs2_glock_dq_uninit(&gh);
+do_flush:
+ if (sync != 0)
+ gfs2_log_flush(GFS2_SB(inode), ip->i_gl);
+ return ret;
+}
- return 0;
+/**
+ * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one
+ * @sdp: the filesystem
+ *
+ * Returns: errno
+ */
+
+static int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
+{
+ struct gfs2_holder t_gh;
+ int error;
+
+ gfs2_quota_sync(sdp);
+ gfs2_statfs_sync(sdp);
+
+ error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE,
+ &t_gh);
+ if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
+ return error;
+
+ gfs2_meta_syncfs(sdp);
+ gfs2_log_shutdown(sdp);
+
+ clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
+
+ if (t_gh.gh_gl)
+ gfs2_glock_dq_uninit(&t_gh);
+
+ gfs2_quota_cleanup(sdp);
+
+ return error;
}
/**
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);
/* Release stuff */
- iput(sdp->sd_master_dir);
iput(sdp->sd_jindex);
iput(sdp->sd_inum_inode);
iput(sdp->sd_statfs_inode);
*
* Flushes the log to disk.
*/
+
static int gfs2_sync_fs(struct super_block *sb, int wait)
{
sb->s_dirt = 0;
}
}
- 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;
}
* inode's blocks, or alternatively pass the baton on to another
* node for later deallocation.
*/
+
static void gfs2_drop_inode(struct inode *inode)
{
struct gfs2_inode *ip = GFS2_I(inode);
}
}
+static int is_ancestor(const struct dentry *d1, const struct dentry *d2)
+{
+ do {
+ if (d1 == d2)
+ return 1;
+ d1 = d1->d_parent;
+ } while (!IS_ROOT(d1));
+ return 0;
+}
+
/**
* gfs2_show_options - Show mount options for /proc/mounts
* @s: seq_file structure
struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info;
struct gfs2_args *args = &sdp->sd_args;
+ if (is_ancestor(mnt->mnt_root, sdp->sd_master_dir))
+ seq_printf(s, ",meta");
if (args->ar_lockproto[0])
seq_printf(s, ",lockproto=%s", args->ar_lockproto);
if (args->ar_locktable[0])
* 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;
clear_inode(inode);
}
-
-
static struct inode *gfs2_alloc_inode(struct super_block *sb)
{
struct gfs2_inode *ip;
#include "trans.h"
#include "util.h"
-static const u32 gfs2_old_fs_formats[] = {
- 0
-};
-
-static const u32 gfs2_old_multihost_formats[] = {
- 0
-};
-
-/**
- * gfs2_tune_init - Fill a gfs2_tune structure with default values
- * @gt: tune
- *
- */
-
-void gfs2_tune_init(struct gfs2_tune *gt)
-{
- spin_lock_init(>->gt_spin);
-
- gt->gt_demote_secs = 300;
- gt->gt_incore_log_blocks = 1024;
- gt->gt_log_flush_secs = 60;
- gt->gt_recoverd_secs = 60;
- gt->gt_logd_secs = 1;
- gt->gt_quotad_secs = 5;
- gt->gt_quota_simul_sync = 64;
- gt->gt_quota_warn_period = 10;
- gt->gt_quota_scale_num = 1;
- gt->gt_quota_scale_den = 1;
- gt->gt_quota_cache_secs = 300;
- gt->gt_quota_quantum = 60;
- gt->gt_atime_quantum = 3600;
- gt->gt_new_files_jdata = 0;
- gt->gt_max_readahead = 1 << 18;
- gt->gt_stall_secs = 600;
- gt->gt_complain_secs = 10;
- gt->gt_statfs_quantum = 30;
- gt->gt_statfs_slow = 0;
-}
-
-/**
- * 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.
- */
-
-int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb_host *sb, int silent)
-{
- unsigned int x;
-
- if (sb->sb_magic != GFS2_MAGIC ||
- sb->sb_type != GFS2_METATYPE_SB) {
- if (!silent)
- printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n");
- 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;
-
- if (sb->sb_fs_format != GFS2_FORMAT_FS) {
- for (x = 0; gfs2_old_fs_formats[x]; x++)
- if (gfs2_old_fs_formats[x] == sb->sb_fs_format)
- break;
-
- if (!gfs2_old_fs_formats[x]) {
- printk(KERN_WARNING
- "GFS2: code version (%u, %u) is incompatible "
- "with ondisk format (%u, %u)\n",
- GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
- sb->sb_fs_format, sb->sb_multihost_format);
- printk(KERN_WARNING
- "GFS2: I don't know how to upgrade this FS\n");
- return -EINVAL;
- }
- }
-
- if (sb->sb_multihost_format != GFS2_FORMAT_MULTI) {
- for (x = 0; gfs2_old_multihost_formats[x]; x++)
- if (gfs2_old_multihost_formats[x] ==
- sb->sb_multihost_format)
- break;
-
- if (!gfs2_old_multihost_formats[x]) {
- printk(KERN_WARNING
- "GFS2: code version (%u, %u) is incompatible "
- "with ondisk format (%u, %u)\n",
- GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
- sb->sb_fs_format, sb->sb_multihost_format);
- printk(KERN_WARNING
- "GFS2: I don't know how to upgrade this FS\n");
- return -EINVAL;
- }
- }
-
- if (!sdp->sd_args.ar_upgrade) {
- printk(KERN_WARNING
- "GFS2: code version (%u, %u) is incompatible "
- "with ondisk format (%u, %u)\n",
- GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
- sb->sb_fs_format, sb->sb_multihost_format);
- printk(KERN_INFO
- "GFS2: Use the \"upgrade\" mount option to upgrade "
- "the FS\n");
- printk(KERN_INFO "GFS2: See the manual for more details\n");
- return -EINVAL;
- }
-
- return 0;
-}
-
-
-static void end_bio_io_page(struct bio *bio, int error)
-{
- struct page *page = bio->bi_private;
-
- if (!error)
- SetPageUptodate(page);
- else
- printk(KERN_WARNING "gfs2: error %d reading superblock\n", error);
- unlock_page(page);
-}
-
-static void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf)
-{
- 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);
-}
-
-/**
- * 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
- */
-
-int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector)
-{
- 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))
- return -ENOBUFS;
-
- ClearPageUptodate(page);
- ClearPageDirty(page);
- lock_page(page);
-
- bio = bio_alloc(GFP_NOFS, 1);
- if (unlikely(!bio)) {
- __free_page(page);
- return -ENOBUFS;
- }
-
- bio->bi_sector = sector * (sb->s_blocksize >> 9);
- 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;
- submit_bio(READ_SYNC | (1 << BIO_RW_META), bio);
- wait_on_page_locked(page);
- bio_put(bio);
- if (!PageUptodate(page)) {
- __free_page(page);
- return -EIO;
- }
- p = kmap(page);
- gfs2_sb_in(&sdp->sd_sb, p);
- kunmap(page);
- __free_page(page);
- return 0;
-}
-
-/**
- * gfs2_read_sb - Read super block
- * @sdp: The GFS2 superblock
- * @gl: the glock for the superblock (assumed to be held)
- * @silent: Don't print message if mount fails
- *
- */
-
-int gfs2_read_sb(struct gfs2_sbd *sdp, struct gfs2_glock *gl, int silent)
-{
- u32 hash_blocks, ind_blocks, leaf_blocks;
- u32 tmp_blocks;
- unsigned int x;
- int error;
-
- error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
- if (error) {
- if (!silent)
- fs_err(sdp, "can't read superblock\n");
- return error;
- }
-
- error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
- if (error)
- return error;
-
- 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);
-
- /* 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);
-
- return 0;
-}
-
/**
* gfs2_jindex_hold - Grab a lock on the jindex
* @sdp: The GFS2 superblock
return error;
}
-/**
- * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one
- * @sdp: the filesystem
- *
- * Returns: errno
- */
-
-int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
-{
- struct gfs2_holder t_gh;
- int error;
-
- gfs2_quota_sync(sdp);
- gfs2_statfs_sync(sdp);
-
- error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE,
- &t_gh);
- if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
- return error;
-
- gfs2_meta_syncfs(sdp);
- gfs2_log_shutdown(sdp);
-
- clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
-
- if (t_gh.gh_gl)
- gfs2_glock_dq_uninit(&t_gh);
-
- gfs2_quota_cleanup(sdp);
-
- return error;
-}
-
static void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf)
{
const struct gfs2_statfs_change *str = buf;
#include "incore.h"
-void gfs2_tune_init(struct gfs2_tune *gt);
-
-int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb_host *sb, int silent);
-int gfs2_read_sb(struct gfs2_sbd *sdp, struct gfs2_glock *gl, int silent);
-int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector);
void gfs2_lm_unmount(struct gfs2_sbd *sdp);
static inline unsigned int gfs2_jindex_size(struct gfs2_sbd *sdp)
struct gfs2_inode **ipp);
int gfs2_make_fs_rw(struct gfs2_sbd *sdp);
-int gfs2_make_fs_ro(struct gfs2_sbd *sdp);
int gfs2_statfs_init(struct gfs2_sbd *sdp);
void gfs2_statfs_change(struct gfs2_sbd *sdp,
ARGS_ATTR(suiddir, "%d\n");
ARGS_ATTR(data, "%d\n");
-/* one oddball doesn't fit the macro mold */
-static ssize_t noatime_show(struct gfs2_sbd *sdp, char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%d\n",
- !!test_bit(SDF_NOATIME, &sdp->sd_flags));
-}
-static struct args_attr args_attr_noatime = __ATTR_RO(noatime);
-
static struct attribute *args_attrs[] = {
&args_attr_lockproto.attr,
&args_attr_locktable.attr,
&args_attr_quota.attr,
&args_attr_suiddir.attr,
&args_attr_data.attr,
- &args_attr_noatime.attr,
NULL,
};
TUNE_ATTR(log_flush_secs, 0);
TUNE_ATTR(quota_warn_period, 0);
TUNE_ATTR(quota_quantum, 0);
-TUNE_ATTR(atime_quantum, 0);
TUNE_ATTR(max_readahead, 0);
TUNE_ATTR(complain_secs, 0);
TUNE_ATTR(statfs_slow, 0);
&tune_attr_log_flush_secs.attr,
&tune_attr_quota_warn_period.attr,
&tune_attr_quota_quantum.attr,
- &tune_attr_atime_quantum.attr,
&tune_attr_max_readahead.attr,
&tune_attr_complain_secs.attr,
&tune_attr_statfs_slow.attr,
char sb_lockproto[GFS2_LOCKNAME_LEN];
char sb_locktable[GFS2_LOCKNAME_LEN];
- /* In gfs1, quota and license dinodes followed */
+
+ struct gfs2_inum __pad3; /* Was quota inode in gfs1 */
+ struct gfs2_inum __pad4; /* Was licence inode in gfs1 */
+#define GFS2_HAS_UUID 1
+ __u8 sb_uuid[16]; /* The UUID, maybe 0 for backwards compat */
};
/*
projects / mv-sheeva.git / commitdiff