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add a branch and its table named "b_iam" for "Index API Module" from #colibri
[fs/lustre-release.git]
/
lustre
/
llite
/
llite_gns.c
diff --git
a/lustre/llite/llite_gns.c
b/lustre/llite/llite_gns.c
index
289ac84
..
d9affef
100644
(file)
--- a/
lustre/llite/llite_gns.c
+++ b/
lustre/llite/llite_gns.c
@@
-50,6
+50,7
@@
ll_gns_wait_for_mount(struct dentry *dentry,
{
struct l_wait_info lwi;
struct ll_sb_info *sbi;
+ int rc = 0;
ENTRY;
LASSERT(dentry != NULL);
@@
-57,16
+58,21
@@
ll_gns_wait_for_mount(struct dentry *dentry,
sbi = ll_s2sbi(dentry->d_sb);
lwi = LWI_TIMEOUT(timeout * HZ, NULL, NULL);
- for (; !d_mountpoint(dentry) && tries > 0; tries--)
+ for (; !d_mountpoint(dentry) && tries > 0; tries--)
{
l_wait_event(sbi->ll_gns_waitq, d_mountpoint(dentry), &lwi);
+ if (signal_pending(current))
+ GOTO(out, rc = -EINTR);
+ }
- if (d_mountpoint(dentry)) {
- spin_lock(&sbi->ll_gns_lock);
- sbi->ll_gns_state = LL_GNS_FINISHED;
- spin_unlock(&sbi->ll_gns_lock);
- RETURN(0);
- }
- RETURN(-ETIME);
+ if (!d_mountpoint(dentry))
+ rc = -ETIME;
+
+ EXIT;
+out:
+ spin_lock(&sbi->ll_gns_lock);
+ sbi->ll_gns_state = LL_GNS_FINISHED;
+ spin_unlock(&sbi->ll_gns_lock);
+ return rc;
}
/*
@@
-77,11
+83,11
@@
ll_gns_wait_for_mount(struct dentry *dentry,
int
ll_gns_mount_object(struct dentry *dentry, struct vfsmount *mnt)
{
- char *path, *pathpage, *datapage, *argv[4];
+ char *path, *pathpage, *datapage
= NULL
, *argv[4];
struct file *mntinfo_fd = NULL;
int cleanup_phase = 0, rc = 0;
struct ll_sb_info *sbi;
- struct dentry *dchild;
+ struct dentry *dchild
= NULL
;
ENTRY;
LASSERT(dentry->d_inode != NULL);
@@
-167,8
+173,8
@@
ll_gns_mount_object(struct dentry *dentry, struct vfsmount *mnt)
path = d_path(dentry, mnt, pathpage, PAGE_SIZE);
if (IS_ERR(path)) {
CERROR("can't build mount object path, err %d\n",
- (int)PTR_ERR(
dchild
));
- GOTO(cleanup, rc = PTR_ERR(
dchild
));
+ (int)PTR_ERR(
path
));
+ GOTO(cleanup, rc = PTR_ERR(
path
));
}
/* synchronizing with possible /proc/fs/...write */
@@
-188,8
+194,6
@@
ll_gns_mount_object(struct dentry *dentry, struct vfsmount *mnt)
strlen(sbi->ll_gns_oname));
up(&sbi->ll_gns_sem);
- cleanup_phase = 2;
-
if (IS_ERR(dchild)) {
rc = PTR_ERR(dchild);
CERROR("can't find mount object %*s/%*s err = %d.\n",
@@
-200,26
+204,39
@@
ll_gns_mount_object(struct dentry *dentry, struct vfsmount *mnt)
}
/* mount object is not found */
- if (!dchild->d_inode)
+ if (!dchild->d_inode) {
+ dput(dchild);
GOTO(cleanup, rc = -ENOENT);
+ }
/* check if found child is regular file */
- if (!S_ISREG(dchild->d_inode->i_mode))
+ if (!S_ISREG(dchild->d_inode->i_mode)) {
+ dput(dchild);
GOTO(cleanup, rc = -EBADF);
-
- mntget(mnt);
+ }
/* ok, mount object if found, opening it. */
- mntinfo_fd = dentry_open(dchild, mnt, 0);
+ mntinfo_fd = dentry_open(dchild, mnt
get(mnt)
, 0);
if (IS_ERR(mntinfo_fd)) {
CERROR("can't open mount object %*s/%*s err = %d.\n",
(int)dentry->d_name.len, dentry->d_name.name,
strlen(sbi->ll_gns_oname), sbi->ll_gns_oname,
(int)PTR_ERR(mntinfo_fd));
mntput(mnt);
+ dput(dchild);
GOTO(cleanup, rc = PTR_ERR(mntinfo_fd));
}
- cleanup_phase = 3;
+ cleanup_phase = 2;
+
+ /* make sure that inode size is up-to-date */
+ rc = ll_inode_revalidate_it(mntinfo_fd->f_dentry);
+ if (rc < 0) {
+ CERROR("can't revalidate mount object %*s/%*s, err %d\n",
+ (int)dentry->d_name.len, dentry->d_name.name,
+ strlen(sbi->ll_gns_oname), sbi->ll_gns_oname,
+ rc);
+ GOTO(cleanup, rc);
+ }
if (mntinfo_fd->f_dentry->d_inode->i_size > PAGE_SIZE - 1) {
CERROR("mount object %*s/%*s is too big (%Ld)\n",
@@
-233,7
+250,7
@@
ll_gns_mount_object(struct dentry *dentry, struct vfsmount *mnt)
if (!datapage)
GOTO(cleanup, rc = -ENOMEM);
- cleanup_phase =
4
;
+ cleanup_phase =
3
;
/* read data from mount object. */
rc = kernel_read(mntinfo_fd, 0, datapage, PAGE_SIZE - 1);
@@
-284,12
+301,13
@@
ll_gns_mount_object(struct dentry *dentry, struct vfsmount *mnt)
* second.
*/
rc = ll_gns_wait_for_mount(dentry, 1, GNS_WAIT_ATTEMPTS);
- if (rc == 0) {
+ LASSERT(sbi->ll_gns_state == LL_GNS_FINISHED);
+
+ /* checking for mount point anyway to not loss mounts */
+ if (d_mountpoint(dentry)) {
struct dentry *rdentry;
struct vfsmount *rmnt;
- LASSERT(sbi->ll_gns_state == LL_GNS_FINISHED);
-
rmnt = mntget(mnt);
rdentry = dget(dentry);
@@
-310,6
+328,8
@@
ll_gns_mount_object(struct dentry *dentry, struct vfsmount *mnt)
mntput(mnt);
dput(dentry);
}
+
+ rc = 0;
} else {
CERROR("usermode upcall %s failed to mount %s, err %d\n",
sbi->ll_gns_upcall, path, rc);
@@
-318,14
+338,13
@@
ll_gns_mount_object(struct dentry *dentry, struct vfsmount *mnt)
EXIT;
cleanup:
switch (cleanup_phase) {
- case 4:
- free_page((unsigned long)datapage);
case 3:
- if (mntinfo_fd != NULL)
- fput(mntinfo_fd);
+ free_page((unsigned long)datapage);
case 2:
- if (dchild != NULL)
- dput(dchild);
+ if (mntinfo_fd != NULL) {
+ fput(mntinfo_fd);
+ dchild = NULL;
+ }
case 1:
free_page((unsigned long)pathpage);
case 0:
@@
-444,7
+463,7
@@
static int inline ll_gns_check_stop(void)
}
/* GNS control thread function. */
-static int ll_gns_thread
_main
(void *arg)
+static int ll_gns_thread(void *arg)
{
struct ll_gns_ctl *ctl = arg;
unsigned long flags;
@@
-513,7
+532,7
@@
void ll_gns_del_timer(struct ll_sb_info *sbi)
* starts GNS control thread and waits for a signal it is up and work may be
* continued.
*/
-int ll_gns_
start_thread
(void)
+int ll_gns_
thread_start
(void)
{
int rc;
ENTRY;
@@
-523,7
+542,7
@@
int ll_gns_start_thread(void)
init_completion(&gns_ctl.gc_finishing);
init_waitqueue_head(&gns_thread.t_ctl_waitq);
- rc = kernel_thread(ll_gns_thread
_main
, &gns_ctl,
+ rc = kernel_thread(ll_gns_thread, &gns_ctl,
(CLONE_VM | CLONE_FILES));
if (rc < 0) {
CERROR("cannot start GNS control thread, "
@@
-536,7
+555,7
@@
int ll_gns_start_thread(void)
}
/* stops GNS control thread and waits its actual stop. */
-void ll_gns_
stop_thread
(void)
+void ll_gns_
thread_stop
(void)
{
ENTRY;
gns_thread.t_flags = SVC_STOPPING;