diff options
Diffstat (limited to 'fs/lockd')
-rw-r--r-- | fs/lockd/svc.c | 2 | ||||
-rw-r--r-- | fs/lockd/svc4proc.c | 7 | ||||
-rw-r--r-- | fs/lockd/svclock.c | 82 | ||||
-rw-r--r-- | fs/lockd/svcproc.c | 6 | ||||
-rw-r--r-- | fs/lockd/svcsubs.c | 114 |
5 files changed, 136 insertions, 75 deletions
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c index 2de048f80eb8..0ab9756ed235 100644 --- a/fs/lockd/svc.c +++ b/fs/lockd/svc.c @@ -584,7 +584,7 @@ static struct ctl_table nlm_sysctls[] = { .data = &nsm_use_hostnames, .maxlen = sizeof(int), .mode = 0644, - .proc_handler = proc_dointvec, + .proc_handler = proc_dobool, }, { .procname = "nsm_local_state", diff --git a/fs/lockd/svc4proc.c b/fs/lockd/svc4proc.c index 4c10fb5138f1..e10ae2c41279 100644 --- a/fs/lockd/svc4proc.c +++ b/fs/lockd/svc4proc.c @@ -40,12 +40,15 @@ nlm4svc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp, /* Obtain file pointer. Not used by FREE_ALL call. */ if (filp != NULL) { - if ((error = nlm_lookup_file(rqstp, &file, &lock->fh)) != 0) + int mode = lock_to_openmode(&lock->fl); + + error = nlm_lookup_file(rqstp, &file, lock); + if (error) goto no_locks; *filp = file; /* Set up the missing parts of the file_lock structure */ - lock->fl.fl_file = file->f_file; + lock->fl.fl_file = file->f_file[mode]; lock->fl.fl_pid = current->tgid; lock->fl.fl_lmops = &nlmsvc_lock_operations; nlmsvc_locks_init_private(&lock->fl, host, (pid_t)lock->svid); diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c index 61d3cc2283dc..e9b85d8fd5fe 100644 --- a/fs/lockd/svclock.c +++ b/fs/lockd/svclock.c @@ -31,6 +31,7 @@ #include <linux/lockd/nlm.h> #include <linux/lockd/lockd.h> #include <linux/kthread.h> +#include <linux/exportfs.h> #define NLMDBG_FACILITY NLMDBG_SVCLOCK @@ -395,28 +396,10 @@ nlmsvc_release_lockowner(struct nlm_lock *lock) nlmsvc_put_lockowner(lock->fl.fl_owner); } -static void nlmsvc_locks_copy_lock(struct file_lock *new, struct file_lock *fl) -{ - struct nlm_lockowner *nlm_lo = (struct nlm_lockowner *)fl->fl_owner; - new->fl_owner = nlmsvc_get_lockowner(nlm_lo); -} - -static void nlmsvc_locks_release_private(struct file_lock *fl) -{ - nlmsvc_put_lockowner((struct nlm_lockowner *)fl->fl_owner); -} - -static const struct file_lock_operations nlmsvc_lock_ops = { - .fl_copy_lock = nlmsvc_locks_copy_lock, - .fl_release_private = nlmsvc_locks_release_private, -}; - void nlmsvc_locks_init_private(struct file_lock *fl, struct nlm_host *host, pid_t pid) { fl->fl_owner = nlmsvc_find_lockowner(host, pid); - if (fl->fl_owner != NULL) - fl->fl_ops = &nlmsvc_lock_ops; } /* @@ -488,17 +471,24 @@ nlmsvc_lock(struct svc_rqst *rqstp, struct nlm_file *file, struct nlm_cookie *cookie, int reclaim) { struct nlm_block *block = NULL; + struct inode *inode = nlmsvc_file_inode(file); int error; + int mode; + int async_block = 0; __be32 ret; dprintk("lockd: nlmsvc_lock(%s/%ld, ty=%d, pi=%d, %Ld-%Ld, bl=%d)\n", - locks_inode(file->f_file)->i_sb->s_id, - locks_inode(file->f_file)->i_ino, + inode->i_sb->s_id, inode->i_ino, lock->fl.fl_type, lock->fl.fl_pid, (long long)lock->fl.fl_start, (long long)lock->fl.fl_end, wait); + if (inode->i_sb->s_export_op->flags & EXPORT_OP_SYNC_LOCKS) { + async_block = wait; + wait = 0; + } + /* Lock file against concurrent access */ mutex_lock(&file->f_mutex); /* Get existing block (in case client is busy-waiting) @@ -542,7 +532,8 @@ nlmsvc_lock(struct svc_rqst *rqstp, struct nlm_file *file, if (!wait) lock->fl.fl_flags &= ~FL_SLEEP; - error = vfs_lock_file(file->f_file, F_SETLK, &lock->fl, NULL); + mode = lock_to_openmode(&lock->fl); + error = vfs_lock_file(file->f_file[mode], F_SETLK, &lock->fl, NULL); lock->fl.fl_flags &= ~FL_SLEEP; dprintk("lockd: vfs_lock_file returned %d\n", error); @@ -558,7 +549,7 @@ nlmsvc_lock(struct svc_rqst *rqstp, struct nlm_file *file, */ if (wait) break; - ret = nlm_lck_denied; + ret = async_block ? nlm_lck_blocked : nlm_lck_denied; goto out; case FILE_LOCK_DEFERRED: if (wait) @@ -595,12 +586,13 @@ nlmsvc_testlock(struct svc_rqst *rqstp, struct nlm_file *file, struct nlm_lock *conflock, struct nlm_cookie *cookie) { int error; + int mode; __be32 ret; struct nlm_lockowner *test_owner; dprintk("lockd: nlmsvc_testlock(%s/%ld, ty=%d, %Ld-%Ld)\n", - locks_inode(file->f_file)->i_sb->s_id, - locks_inode(file->f_file)->i_ino, + nlmsvc_file_inode(file)->i_sb->s_id, + nlmsvc_file_inode(file)->i_ino, lock->fl.fl_type, (long long)lock->fl.fl_start, (long long)lock->fl.fl_end); @@ -613,7 +605,8 @@ nlmsvc_testlock(struct svc_rqst *rqstp, struct nlm_file *file, /* If there's a conflicting lock, remember to clean up the test lock */ test_owner = (struct nlm_lockowner *)lock->fl.fl_owner; - error = vfs_test_lock(file->f_file, &lock->fl); + mode = lock_to_openmode(&lock->fl); + error = vfs_test_lock(file->f_file[mode], &lock->fl); if (error) { /* We can't currently deal with deferred test requests */ if (error == FILE_LOCK_DEFERRED) @@ -634,7 +627,7 @@ nlmsvc_testlock(struct svc_rqst *rqstp, struct nlm_file *file, conflock->caller = "somehost"; /* FIXME */ conflock->len = strlen(conflock->caller); conflock->oh.len = 0; /* don't return OH info */ - conflock->svid = ((struct nlm_lockowner *)lock->fl.fl_owner)->pid; + conflock->svid = lock->fl.fl_pid; conflock->fl.fl_type = lock->fl.fl_type; conflock->fl.fl_start = lock->fl.fl_start; conflock->fl.fl_end = lock->fl.fl_end; @@ -659,11 +652,11 @@ out: __be32 nlmsvc_unlock(struct net *net, struct nlm_file *file, struct nlm_lock *lock) { - int error; + int error = 0; dprintk("lockd: nlmsvc_unlock(%s/%ld, pi=%d, %Ld-%Ld)\n", - locks_inode(file->f_file)->i_sb->s_id, - locks_inode(file->f_file)->i_ino, + nlmsvc_file_inode(file)->i_sb->s_id, + nlmsvc_file_inode(file)->i_ino, lock->fl.fl_pid, (long long)lock->fl.fl_start, (long long)lock->fl.fl_end); @@ -672,7 +665,12 @@ nlmsvc_unlock(struct net *net, struct nlm_file *file, struct nlm_lock *lock) nlmsvc_cancel_blocked(net, file, lock); lock->fl.fl_type = F_UNLCK; - error = vfs_lock_file(file->f_file, F_SETLK, &lock->fl, NULL); + if (file->f_file[O_RDONLY]) + error = vfs_lock_file(file->f_file[O_RDONLY], F_SETLK, + &lock->fl, NULL); + if (file->f_file[O_WRONLY]) + error = vfs_lock_file(file->f_file[O_WRONLY], F_SETLK, + &lock->fl, NULL); return (error < 0)? nlm_lck_denied_nolocks : nlm_granted; } @@ -689,10 +687,11 @@ nlmsvc_cancel_blocked(struct net *net, struct nlm_file *file, struct nlm_lock *l { struct nlm_block *block; int status = 0; + int mode; dprintk("lockd: nlmsvc_cancel(%s/%ld, pi=%d, %Ld-%Ld)\n", - locks_inode(file->f_file)->i_sb->s_id, - locks_inode(file->f_file)->i_ino, + nlmsvc_file_inode(file)->i_sb->s_id, + nlmsvc_file_inode(file)->i_ino, lock->fl.fl_pid, (long long)lock->fl.fl_start, (long long)lock->fl.fl_end); @@ -704,7 +703,8 @@ nlmsvc_cancel_blocked(struct net *net, struct nlm_file *file, struct nlm_lock *l block = nlmsvc_lookup_block(file, lock); mutex_unlock(&file->f_mutex); if (block != NULL) { - vfs_cancel_lock(block->b_file->f_file, + mode = lock_to_openmode(&lock->fl); + vfs_cancel_lock(block->b_file->f_file[mode], &block->b_call->a_args.lock.fl); status = nlmsvc_unlink_block(block); nlmsvc_release_block(block); @@ -788,9 +788,21 @@ nlmsvc_notify_blocked(struct file_lock *fl) printk(KERN_WARNING "lockd: notification for unknown block!\n"); } +static fl_owner_t nlmsvc_get_owner(fl_owner_t owner) +{ + return nlmsvc_get_lockowner(owner); +} + +static void nlmsvc_put_owner(fl_owner_t owner) +{ + nlmsvc_put_lockowner(owner); +} + const struct lock_manager_operations nlmsvc_lock_operations = { .lm_notify = nlmsvc_notify_blocked, .lm_grant = nlmsvc_grant_deferred, + .lm_get_owner = nlmsvc_get_owner, + .lm_put_owner = nlmsvc_put_owner, }; /* @@ -809,6 +821,7 @@ nlmsvc_grant_blocked(struct nlm_block *block) { struct nlm_file *file = block->b_file; struct nlm_lock *lock = &block->b_call->a_args.lock; + int mode; int error; loff_t fl_start, fl_end; @@ -834,7 +847,8 @@ nlmsvc_grant_blocked(struct nlm_block *block) lock->fl.fl_flags |= FL_SLEEP; fl_start = lock->fl.fl_start; fl_end = lock->fl.fl_end; - error = vfs_lock_file(file->f_file, F_SETLK, &lock->fl, NULL); + mode = lock_to_openmode(&lock->fl); + error = vfs_lock_file(file->f_file[mode], F_SETLK, &lock->fl, NULL); lock->fl.fl_flags &= ~FL_SLEEP; lock->fl.fl_start = fl_start; lock->fl.fl_end = fl_end; diff --git a/fs/lockd/svcproc.c b/fs/lockd/svcproc.c index 4ae4b63b5392..99696d3f6dd6 100644 --- a/fs/lockd/svcproc.c +++ b/fs/lockd/svcproc.c @@ -55,6 +55,7 @@ nlmsvc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp, struct nlm_host *host = NULL; struct nlm_file *file = NULL; struct nlm_lock *lock = &argp->lock; + int mode; __be32 error = 0; /* nfsd callbacks must have been installed for this procedure */ @@ -69,13 +70,14 @@ nlmsvc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp, /* Obtain file pointer. Not used by FREE_ALL call. */ if (filp != NULL) { - error = cast_status(nlm_lookup_file(rqstp, &file, &lock->fh)); + error = cast_status(nlm_lookup_file(rqstp, &file, lock)); if (error != 0) goto no_locks; *filp = file; /* Set up the missing parts of the file_lock structure */ - lock->fl.fl_file = file->f_file; + mode = lock_to_openmode(&lock->fl); + lock->fl.fl_file = file->f_file[mode]; lock->fl.fl_pid = current->tgid; lock->fl.fl_lmops = &nlmsvc_lock_operations; nlmsvc_locks_init_private(&lock->fl, host, (pid_t)lock->svid); diff --git a/fs/lockd/svcsubs.c b/fs/lockd/svcsubs.c index 028fc152da22..cb3a7512c33e 100644 --- a/fs/lockd/svcsubs.c +++ b/fs/lockd/svcsubs.c @@ -45,7 +45,7 @@ static inline void nlm_debug_print_fh(char *msg, struct nfs_fh *f) static inline void nlm_debug_print_file(char *msg, struct nlm_file *file) { - struct inode *inode = locks_inode(file->f_file); + struct inode *inode = nlmsvc_file_inode(file); dprintk("lockd: %s %s/%ld\n", msg, inode->i_sb->s_id, inode->i_ino); @@ -71,56 +71,75 @@ static inline unsigned int file_hash(struct nfs_fh *f) return tmp & (FILE_NRHASH - 1); } +int lock_to_openmode(struct file_lock *lock) +{ + return (lock->fl_type == F_WRLCK) ? O_WRONLY : O_RDONLY; +} + +/* + * Open the file. Note that if we're reexporting, for example, + * this could block the lockd thread for a while. + * + * We have to make sure we have the right credential to open + * the file. + */ +static __be32 nlm_do_fopen(struct svc_rqst *rqstp, + struct nlm_file *file, int mode) +{ + struct file **fp = &file->f_file[mode]; + __be32 nfserr; + + if (*fp) + return 0; + nfserr = nlmsvc_ops->fopen(rqstp, &file->f_handle, fp, mode); + if (nfserr) + dprintk("lockd: open failed (error %d)\n", nfserr); + return nfserr; +} + /* * Lookup file info. If it doesn't exist, create a file info struct * and open a (VFS) file for the given inode. - * - * FIXME: - * Note that we open the file O_RDONLY even when creating write locks. - * This is not quite right, but for now, we assume the client performs - * the proper R/W checking. */ __be32 nlm_lookup_file(struct svc_rqst *rqstp, struct nlm_file **result, - struct nfs_fh *f) + struct nlm_lock *lock) { struct nlm_file *file; unsigned int hash; __be32 nfserr; + int mode; - nlm_debug_print_fh("nlm_lookup_file", f); + nlm_debug_print_fh("nlm_lookup_file", &lock->fh); - hash = file_hash(f); + hash = file_hash(&lock->fh); + mode = lock_to_openmode(&lock->fl); /* Lock file table */ mutex_lock(&nlm_file_mutex); hlist_for_each_entry(file, &nlm_files[hash], f_list) - if (!nfs_compare_fh(&file->f_handle, f)) + if (!nfs_compare_fh(&file->f_handle, &lock->fh)) { + mutex_lock(&file->f_mutex); + nfserr = nlm_do_fopen(rqstp, file, mode); + mutex_unlock(&file->f_mutex); goto found; - - nlm_debug_print_fh("creating file for", f); + } + nlm_debug_print_fh("creating file for", &lock->fh); nfserr = nlm_lck_denied_nolocks; file = kzalloc(sizeof(*file), GFP_KERNEL); if (!file) - goto out_unlock; + goto out_free; - memcpy(&file->f_handle, f, sizeof(struct nfs_fh)); + memcpy(&file->f_handle, &lock->fh, sizeof(struct nfs_fh)); mutex_init(&file->f_mutex); INIT_HLIST_NODE(&file->f_list); INIT_LIST_HEAD(&file->f_blocks); - /* Open the file. Note that this must not sleep for too long, else - * we would lock up lockd:-) So no NFS re-exports, folks. - * - * We have to make sure we have the right credential to open - * the file. - */ - if ((nfserr = nlmsvc_ops->fopen(rqstp, f, &file->f_file)) != 0) { - dprintk("lockd: open failed (error %d)\n", nfserr); - goto out_free; - } + nfserr = nlm_do_fopen(rqstp, file, mode); + if (nfserr) + goto out_unlock; hlist_add_head(&file->f_list, &nlm_files[hash]); @@ -128,7 +147,6 @@ found: dprintk("lockd: found file %p (count %d)\n", file, file->f_count); *result = file; file->f_count++; - nfserr = 0; out_unlock: mutex_unlock(&nlm_file_mutex); @@ -148,13 +166,34 @@ nlm_delete_file(struct nlm_file *file) nlm_debug_print_file("closing file", file); if (!hlist_unhashed(&file->f_list)) { hlist_del(&file->f_list); - nlmsvc_ops->fclose(file->f_file); + if (file->f_file[O_RDONLY]) + nlmsvc_ops->fclose(file->f_file[O_RDONLY]); + if (file->f_file[O_WRONLY]) + nlmsvc_ops->fclose(file->f_file[O_WRONLY]); kfree(file); } else { printk(KERN_WARNING "lockd: attempt to release unknown file!\n"); } } +static int nlm_unlock_files(struct nlm_file *file) +{ + struct file_lock lock; + struct file *f; + + lock.fl_type = F_UNLCK; + lock.fl_start = 0; + lock.fl_end = OFFSET_MAX; + for (f = file->f_file[0]; f <= file->f_file[1]; f++) { + if (f && vfs_lock_file(f, F_SETLK, &lock, NULL) < 0) { + pr_warn("lockd: unlock failure in %s:%d\n", + __FILE__, __LINE__); + return 1; + } + } + return 0; +} + /* * Loop over all locks on the given file and perform the specified * action. @@ -182,17 +221,10 @@ again: lockhost = ((struct nlm_lockowner *)fl->fl_owner)->host; if (match(lockhost, host)) { - struct file_lock lock = *fl; spin_unlock(&flctx->flc_lock); - lock.fl_type = F_UNLCK; - lock.fl_start = 0; - lock.fl_end = OFFSET_MAX; - if (vfs_lock_file(file->f_file, F_SETLK, &lock, NULL) < 0) { - printk("lockd: unlock failure in %s:%d\n", - __FILE__, __LINE__); + if (nlm_unlock_files(file)) return 1; - } goto again; } } @@ -246,6 +278,15 @@ nlm_file_inuse(struct nlm_file *file) return 0; } +static void nlm_close_files(struct nlm_file *file) +{ + struct file *f; + + for (f = file->f_file[0]; f <= file->f_file[1]; f++) + if (f) + nlmsvc_ops->fclose(f); +} + /* * Loop over all files in the file table. */ @@ -276,7 +317,7 @@ nlm_traverse_files(void *data, nlm_host_match_fn_t match, if (list_empty(&file->f_blocks) && !file->f_locks && !file->f_shares && !file->f_count) { hlist_del(&file->f_list); - nlmsvc_ops->fclose(file->f_file); + nlm_close_files(file); kfree(file); } } @@ -410,12 +451,13 @@ nlmsvc_invalidate_all(void) nlm_traverse_files(NULL, nlmsvc_is_client, NULL); } + static int nlmsvc_match_sb(void *datap, struct nlm_file *file) { struct super_block *sb = datap; - return sb == locks_inode(file->f_file)->i_sb; + return sb == nlmsvc_file_inode(file)->i_sb; } /** |