From 9a59f452abe11f569e13ec16c51e6d61c54b9838 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 23 Jun 2005 00:10:19 -0700 Subject: [PATCH] remove This file duplicates , using slightly different names. Signed-off-by: Christoph Hellwig Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/vfs.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index ae3940dc85..de340ffd33 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -50,7 +50,6 @@ #include #ifdef CONFIG_NFSD_V4 #include -#include #include #include #include @@ -425,13 +424,13 @@ nfsd4_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, goto out_nfserr; if (pacl) { - error = set_nfsv4_acl_one(dentry, pacl, XATTR_NAME_ACL_ACCESS); + error = set_nfsv4_acl_one(dentry, pacl, POSIX_ACL_XATTR_ACCESS); if (error < 0) goto out_nfserr; } if (dpacl) { - error = set_nfsv4_acl_one(dentry, dpacl, XATTR_NAME_ACL_DEFAULT); + error = set_nfsv4_acl_one(dentry, dpacl, POSIX_ACL_XATTR_DEFAULT); if (error < 0) goto out_nfserr; } @@ -498,7 +497,7 @@ nfsd4_get_nfs4_acl(struct svc_rqst *rqstp, struct dentry *dentry, struct nfs4_ac struct posix_acl *pacl = NULL, *dpacl = NULL; unsigned int flags = 0; - pacl = _get_posix_acl(dentry, XATTR_NAME_ACL_ACCESS); + pacl = _get_posix_acl(dentry, POSIX_ACL_XATTR_ACCESS); if (IS_ERR(pacl) && PTR_ERR(pacl) == -ENODATA) pacl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL); if (IS_ERR(pacl)) { @@ -508,7 +507,7 @@ nfsd4_get_nfs4_acl(struct svc_rqst *rqstp, struct dentry *dentry, struct nfs4_ac } if (S_ISDIR(inode->i_mode)) { - dpacl = _get_posix_acl(dentry, XATTR_NAME_ACL_DEFAULT); + dpacl = _get_posix_acl(dentry, POSIX_ACL_XATTR_DEFAULT); if (IS_ERR(dpacl) && PTR_ERR(dpacl) == -ENODATA) dpacl = NULL; else if (IS_ERR(dpacl)) { -- cgit v1.2.2 From 52f4fb43063c182f3ef7e257ab336a8be8066bb0 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:02:49 -0700 Subject: [PATCH] nfsd4: find_delegation_file() Factor out a bit of common code that will be useful elsewhere. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 25 ++++++++++++++----------- 1 file changed, 14 insertions(+), 11 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 75e8b13758..bb95275e7b 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -1526,6 +1526,18 @@ out: return status; } +static struct nfs4_delegation * +find_delegation_file(struct nfs4_file *fp, stateid_t *stid) +{ + struct nfs4_delegation *dp; + + list_for_each_entry(dp, &fp->fi_del_perfile, dl_del_perfile) { + if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) + return dp; + } + return NULL; +} + static int nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) { @@ -2419,24 +2431,15 @@ find_stateid(stateid_t *stid, int flags) static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid) { - struct nfs4_delegation *dp = NULL; struct nfs4_file *fp = NULL; - u32 st_id; dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", stid->si_boot, stid->si_stateownerid, stid->si_fileid, stid->si_generation); - st_id = stid->si_stateownerid; fp = find_file(ino); - if (fp) { - list_for_each_entry(dp, &fp->fi_del_perfile, dl_del_perfile) { - if(dp->dl_stateid.si_stateownerid == st_id) { - dprintk("NFSD: find_delegation dp %p\n",dp); - return dp; - } - } - } + if (fp) + return find_delegation_file(fp, stid); return NULL; } -- cgit v1.2.2 From 4a6e43e6d4e43723699879f421d321e39eab5e41 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:02:50 -0700 Subject: [PATCH] nfsd4: nfs4_check_delegmode Additional minor code reshuffling to prepare for claim_deleg_cur support. Signed-off-by: Andy Adamson Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index bb95275e7b..31f7082df4 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -1526,6 +1526,15 @@ out: return status; } +static inline int +nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) +{ + if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) + return nfserr_openmode; + else + return nfs_ok; +} + static struct nfs4_delegation * find_delegation_file(struct nfs4_file *fp, stateid_t *stid) { @@ -1960,15 +1969,6 @@ out: return status; } -static inline int -nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) -{ - if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) - return nfserr_openmode; - else - return nfs_ok; -} - static inline int check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) { -- cgit v1.2.2 From 567d98292e81033182e3da4c33b41ada9c113447 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:02:53 -0700 Subject: [PATCH] nfsd4: don't reopen for delegated client We don't really need to be doing a separate open for every stateid. And in the case of an open from a client that already has a delegation on a file, it unnecessarily results in a delegation recall. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 44 ++++++++++++++++++++++++++++++++++++-------- 1 file changed, 36 insertions(+), 8 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 31f7082df4..3791c9d84d 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -1547,6 +1547,24 @@ find_delegation_file(struct nfs4_file *fp, stateid_t *stid) return NULL; } +static void +nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, + struct nfs4_delegation **dp) +{ + int flags; + int status; + + *dp = find_delegation_file(fp, &open->op_delegate_stateid); + if (*dp == NULL) + return; + flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? + RD_STATE : WR_STATE; + status = nfs4_check_delegmode(*dp, flags); + if (status) + *dp = NULL; + return; +} + static int nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) { @@ -1572,21 +1590,28 @@ out: static int nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, + struct nfs4_delegation *dp, struct svc_fh *cur_fh, int flags) { struct nfs4_stateid *stp; - int status; stp = kmalloc(sizeof(struct nfs4_stateid), GFP_KERNEL); if (stp == NULL) return nfserr_resource; - status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, &stp->st_vfs_file); - if (status) { - if (status == nfserr_dropit) - status = nfserr_jukebox; - kfree(stp); - return status; + if (dp) { + get_file(dp->dl_vfs_file); + stp->st_vfs_file = dp->dl_vfs_file; + } else { + int status; + status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, + &stp->st_vfs_file); + if (status) { + if (status == nfserr_dropit) + status = nfserr_jukebox; + kfree(stp); + return status; + } } vfsopen++; *stpp = stp; @@ -1720,6 +1745,7 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf struct nfs4_file *fp = NULL; struct inode *ino = current_fh->fh_dentry->d_inode; struct nfs4_stateid *stp = NULL; + struct nfs4_delegation *dp = NULL; int status; status = nfserr_inval; @@ -1734,6 +1760,7 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf if (fp) { if ((status = nfs4_check_open(fp, open, &stp))) goto out; + nfs4_check_deleg(fp, open, &dp); } else { status = nfserr_resource; fp = alloc_init_file(ino); @@ -1757,7 +1784,8 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf flags = MAY_WRITE; else flags = MAY_READ; - if ((status = nfs4_new_open(rqstp, &stp, current_fh, flags))) + status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); + if (status) goto out; init_stateid(stp, fp, open); status = nfsd4_truncate(rqstp, current_fh, open); -- cgit v1.2.2 From c44c5eeb2c022ddac98a8543c08dc8ff820561dc Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:02:54 -0700 Subject: [PATCH] nfsd4: add open state code for CLAIM_DELEGATE_CUR State logic for OPEN with claim type CLAIM_DELEGATE_CUR, which the NFSv4 client uses to report local OPENs on a delegated file back to the NFSv4 server. nfs4_check_deleg() performs input delegation stateid lookup and sanity check. Signed-off-by: Andy Adamson Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 3791c9d84d..8ac0c9abe9 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -1547,22 +1547,28 @@ find_delegation_file(struct nfs4_file *fp, stateid_t *stid) return NULL; } -static void +static int nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_delegation **dp) { int flags; - int status; + int status = nfserr_bad_stateid; *dp = find_delegation_file(fp, &open->op_delegate_stateid); if (*dp == NULL) - return; + goto out; flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; status = nfs4_check_delegmode(*dp, flags); if (status) *dp = NULL; - return; +out: + if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) + return nfs_ok; + if (status) + return status; + open->op_stateowner->so_confirmed = 1; + return nfs_ok; } static int @@ -1760,8 +1766,13 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf if (fp) { if ((status = nfs4_check_open(fp, open, &stp))) goto out; - nfs4_check_deleg(fp, open, &dp); + status = nfs4_check_deleg(fp, open, &dp); + if (status) + goto out; } else { + status = nfserr_bad_stateid; + if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) + goto out; status = nfserr_resource; fp = alloc_init_file(ino); if (fp == NULL) -- cgit v1.2.2 From 0dd3c19212961453817f219cd6200981c38564bc Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:02:56 -0700 Subject: [PATCH] nfsd4: support CLAIM_DELEGATE_CUR Add OPEN claim type NFS4_OPEN_CLAIM_DELEGATE_CUR to nfsd4_open(). A delegation stateid and a name are provided. OPEN with O_CREAT is not legal with this claim type; otherwise, use the NFS4_OPEN_CLAIM_NULL code path to lookup the filename to be opened. Signed-off-by: Andy Adamson Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4proc.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index e8158741e8..eb8c1337d9 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -198,6 +198,11 @@ nfsd4_open(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open if (status) goto out; switch (open->op_claim_type) { + case NFS4_OPEN_CLAIM_DELEGATE_CUR: + status = nfserr_inval; + if (open->op_create) + goto out; + /* fall through */ case NFS4_OPEN_CLAIM_NULL: /* * (1) set CURRENT_FH to the file being opened, @@ -220,7 +225,6 @@ nfsd4_open(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open if (status) goto out; break; - case NFS4_OPEN_CLAIM_DELEGATE_CUR: case NFS4_OPEN_CLAIM_DELEGATE_PREV: printk("NFSD: unsupported OPEN claim type %d\n", open->op_claim_type); -- cgit v1.2.2 From 496400014f22c4dbdbc1e89249a2feba46939708 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:02:58 -0700 Subject: [PATCH] nfsd4: fix fh_expire_type We're returning NFS4_FH_NOEXPIRE_WITH_OPEN | NFS4_FH_VOL_RENAME for the fh_expire_type attribute. This is incorrect: 1. The spec actually only allows NOEXPIRE_WITH_OPEN when VOLATILE_ANY is also set. 2. Filehandles for open files can expire, if the file is removed and there is a reboot. 3. Filehandles are only volatile on rename in the nosubtree check case. Unfortunately, there's no way to indicate that we only expire on remove. So our only choice is FH4_VOLATILE_ANY. Although it's redundant, we also set FH4_VOL_RENAME in the subtree check case, since subtreecheck does actually cause problems in practice and it seems possibly useful to give clients some way to distinguish that case. Fix a mispelled #define while we're at it. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4xdr.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 36a058a112..0ae1467c3b 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -1366,7 +1366,10 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { if ((buflen -= 4) < 0) goto out_resource; - WRITE32( NFS4_FH_NOEXPIRE_WITH_OPEN | NFS4_FH_VOL_RENAME ); + if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) + WRITE32(NFS4_FH_VOLATILE_ANY); + else + WRITE32(NFS4_FH_VOLATILE_ANY|NFS4_FH_VOL_RENAME); } if (bmval0 & FATTR4_WORD0_CHANGE) { /* -- cgit v1.2.2 From c815afc73eeef089922449857ca4ed4d2e8950cb Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:00 -0700 Subject: [PATCH] nfsd4: block metadata ops during grace period We currently return err_grace if a user attempts a non-reclaim open during the grace period. But we also need to prevent renames and removes, at least, to ensure clients have the chance to recover state on files before they are moved or deleted. Of course, local users could also do renames and removes during the lease period, and there's not much we can do about that. This at least will help with remote users. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4proc.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index eb8c1337d9..ac4878ac22 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -536,6 +536,8 @@ nfsd4_remove(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_rem { int status; + if (nfs4_in_grace()) + return nfserr_grace; status = nfsd_unlink(rqstp, current_fh, 0, remove->rm_name, remove->rm_namelen); if (status == nfserr_symlink) return nfserr_notdir; @@ -554,6 +556,9 @@ nfsd4_rename(struct svc_rqst *rqstp, struct svc_fh *current_fh, if (!save_fh->fh_dentry) return status; + if (nfs4_in_grace() && !(save_fh->fh_export->ex_flags + & NFSEXP_NOSUBTREECHECK)) + return nfserr_grace; status = nfsd_rename(rqstp, save_fh, rename->rn_sname, rename->rn_snamelen, current_fh, rename->rn_tname, rename->rn_tnamelen); -- cgit v1.2.2 From e60d4398a7c20fbe9c4a6cc39d7188ef9f65d2f1 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:01 -0700 Subject: [PATCH] nfsd4: slabify nfs4_files The structures the server uses to keep track of various pieces of nfsv4 state (open files, outstanding delegations, etc.) are likely to be allocated and deallocated frequently and seem reasonable candidates for slab caches. While we're at it, the slab code keeps statistics that help catch leaks and such, so we may as well take this chance to eliminate some debugging counters that we've been keeping ourselves. Start with the struct nfs4_file. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 58 +++++++++++++++++++++++++++++++---------------------- 1 file changed, 34 insertions(+), 24 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 8ac0c9abe9..260c1cbe25 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -70,8 +70,6 @@ u32 list_add_perfile = 0; u32 list_del_perfile = 0; u32 add_perclient = 0; u32 del_perclient = 0; -u32 alloc_file = 0; -u32 free_file = 0; u32 vfsopen = 0; u32 vfsclose = 0; u32 alloc_delegation= 0; @@ -90,6 +88,9 @@ static void release_stateid_lockowners(struct nfs4_stateid *open_stp); */ static DECLARE_MUTEX(client_sema); +kmem_cache_t *stateowner_slab = NULL; +kmem_cache_t *file_slab = NULL; + void nfs4_lock_state(void) { @@ -961,14 +962,14 @@ alloc_init_file(struct inode *ino) struct nfs4_file *fp; unsigned int hashval = file_hashval(ino); - if ((fp = kmalloc(sizeof(struct nfs4_file),GFP_KERNEL))) { + fp = kmem_cache_alloc(file_slab, GFP_KERNEL); + if (fp) { INIT_LIST_HEAD(&fp->fi_hash); INIT_LIST_HEAD(&fp->fi_perfile); INIT_LIST_HEAD(&fp->fi_del_perfile); list_add(&fp->fi_hash, &file_hashtbl[hashval]); fp->fi_inode = igrab(ino); fp->fi_id = current_fileid++; - alloc_file++; return fp; } return NULL; @@ -992,29 +993,41 @@ release_all_files(void) } } -kmem_cache_t *stateowner_slab = NULL; - -static int -nfsd4_init_slabs(void) +static void +nfsd4_free_slab(kmem_cache_t **slab) { - stateowner_slab = kmem_cache_create("nfsd4_stateowners", - sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL); - if (stateowner_slab == NULL) { - dprintk("nfsd4: out of memory while initializing nfsv4\n"); - return -ENOMEM; - } - return 0; + int status; + + if (*slab == NULL) + return; + status = kmem_cache_destroy(*slab); + *slab = NULL; + WARN_ON(status); } static void nfsd4_free_slabs(void) { - int status = 0; + nfsd4_free_slab(&stateowner_slab); + nfsd4_free_slab(&file_slab); +} - if (stateowner_slab) - status = kmem_cache_destroy(stateowner_slab); - stateowner_slab = NULL; - BUG_ON(status); +static int +nfsd4_init_slabs(void) +{ + stateowner_slab = kmem_cache_create("nfsd4_stateowners", + sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL); + if (stateowner_slab == NULL) + goto out_nomem; + file_slab = kmem_cache_create("nfsd4_files", + sizeof(struct nfs4_file), 0, 0, NULL, NULL); + if (file_slab == NULL) + goto out_nomem; + return 0; +out_nomem: + nfsd4_free_slabs(); + dprintk("nfsd4: out of memory while initializing nfsv4\n"); + return -ENOMEM; } void @@ -1167,10 +1180,9 @@ release_stateid(struct nfs4_stateid *stp, int flags) static void release_file(struct nfs4_file *fp) { - free_file++; list_del(&fp->fi_hash); iput(fp->fi_inode); - kfree(fp); + kmem_cache_free(file_slab, fp); } void @@ -3286,8 +3298,6 @@ __nfs4_state_shutdown(void) list_add_perfile, list_del_perfile); dprintk("NFSD: add_perclient %d del_perclient %d\n", add_perclient, del_perclient); - dprintk("NFSD: alloc_file %d free_file %d\n", - alloc_file, free_file); dprintk("NFSD: vfsopen %d vfsclose %d\n", vfsopen, vfsclose); dprintk("NFSD: alloc_delegation %d free_delegation %d\n", -- cgit v1.2.2 From 5ac049ac66416bbe84923f7c2384f23f6ee4aa88 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:03 -0700 Subject: [PATCH] nfsd4: slabify stateids Allocate stateid's from a slab cache. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 22 +++++++++++++++++----- 1 file changed, 17 insertions(+), 5 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 260c1cbe25..c5fce309d8 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -90,6 +90,7 @@ static DECLARE_MUTEX(client_sema); kmem_cache_t *stateowner_slab = NULL; kmem_cache_t *file_slab = NULL; +kmem_cache_t *stateid_slab = NULL; void nfs4_lock_state(void) @@ -1010,6 +1011,7 @@ nfsd4_free_slabs(void) { nfsd4_free_slab(&stateowner_slab); nfsd4_free_slab(&file_slab); + nfsd4_free_slab(&stateid_slab); } static int @@ -1023,6 +1025,10 @@ nfsd4_init_slabs(void) sizeof(struct nfs4_file), 0, 0, NULL, NULL); if (file_slab == NULL) goto out_nomem; + stateid_slab = kmem_cache_create("nfsd4_stateids", + sizeof(struct nfs4_stateid), 0, 0, NULL, NULL); + if (stateid_slab == NULL) + goto out_nomem; return 0; out_nomem: nfsd4_free_slabs(); @@ -1173,7 +1179,7 @@ release_stateid(struct nfs4_stateid *stp, int flags) vfsclose++; } else if (flags & LOCK_STATE) locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); - kfree(stp); + kmem_cache_free(stateid_slab, stp); stp = NULL; } @@ -1606,6 +1612,12 @@ out: return status; } +static inline struct nfs4_stateid * +nfs4_alloc_stateid(void) +{ + return kmem_cache_alloc(stateid_slab, GFP_KERNEL); +} + static int nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, struct nfs4_delegation *dp, @@ -1613,7 +1625,7 @@ nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, { struct nfs4_stateid *stp; - stp = kmalloc(sizeof(struct nfs4_stateid), GFP_KERNEL); + stp = nfs4_alloc_stateid(); if (stp == NULL) return nfserr_resource; @@ -1627,7 +1639,7 @@ nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, if (status) { if (status == nfserr_dropit) status = nfserr_jukebox; - kfree(stp); + kmem_cache_free(stateid_slab, stp); return status; } } @@ -2627,8 +2639,8 @@ alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struc struct nfs4_stateid *stp; unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); - if ((stp = kmalloc(sizeof(struct nfs4_stateid), - GFP_KERNEL)) == NULL) + stp = nfs4_alloc_stateid(); + if (stp == NULL) goto out; INIT_LIST_HEAD(&stp->st_hash); INIT_LIST_HEAD(&stp->st_perfile); -- cgit v1.2.2 From 5b2d21c1965859acc881dd862b6ebbfae67cdc14 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:04 -0700 Subject: [PATCH] nfsd4: slabify delegations Allocate delegations from a slab cache. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index c5fce309d8..927d2007d5 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -72,8 +72,6 @@ u32 add_perclient = 0; u32 del_perclient = 0; u32 vfsopen = 0; u32 vfsclose = 0; -u32 alloc_delegation= 0; -u32 free_delegation= 0; /* forward declarations */ struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); @@ -91,6 +89,7 @@ static DECLARE_MUTEX(client_sema); kmem_cache_t *stateowner_slab = NULL; kmem_cache_t *file_slab = NULL; kmem_cache_t *stateid_slab = NULL; +kmem_cache_t *deleg_slab = NULL; void nfs4_lock_state(void) @@ -138,8 +137,8 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_f struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; dprintk("NFSD alloc_init_deleg\n"); - if ((dp = kmalloc(sizeof(struct nfs4_delegation), - GFP_KERNEL)) == NULL) + dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); + if (dp == NULL) return dp; INIT_LIST_HEAD(&dp->dl_del_perfile); INIT_LIST_HEAD(&dp->dl_del_perclnt); @@ -164,7 +163,6 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_f atomic_set(&dp->dl_count, 1); list_add(&dp->dl_del_perfile, &fp->fi_del_perfile); list_add(&dp->dl_del_perclnt, &clp->cl_del_perclnt); - alloc_delegation++; return dp; } @@ -173,8 +171,7 @@ nfs4_put_delegation(struct nfs4_delegation *dp) { if (atomic_dec_and_test(&dp->dl_count)) { dprintk("NFSD: freeing dp %p\n",dp); - kfree(dp); - free_delegation++; + kmem_cache_free(deleg_slab, dp); } } @@ -1012,6 +1009,7 @@ nfsd4_free_slabs(void) nfsd4_free_slab(&stateowner_slab); nfsd4_free_slab(&file_slab); nfsd4_free_slab(&stateid_slab); + nfsd4_free_slab(&deleg_slab); } static int @@ -1029,6 +1027,10 @@ nfsd4_init_slabs(void) sizeof(struct nfs4_stateid), 0, 0, NULL, NULL); if (stateid_slab == NULL) goto out_nomem; + deleg_slab = kmem_cache_create("nfsd4_delegations", + sizeof(struct nfs4_delegation), 0, 0, NULL, NULL); + if (deleg_slab == NULL) + goto out_nomem; return 0; out_nomem: nfsd4_free_slabs(); @@ -3312,9 +3314,6 @@ __nfs4_state_shutdown(void) add_perclient, del_perclient); dprintk("NFSD: vfsopen %d vfsclose %d\n", vfsopen, vfsclose); - dprintk("NFSD: alloc_delegation %d free_delegation %d\n", - alloc_delegation, free_delegation); - } void -- cgit v1.2.2 From 6fa305ded4cc859deb4727ad9b25df0bbc064e99 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:06 -0700 Subject: [PATCH] nfsd4: remove debugging counters These remaining debugging counters haven't proved that useful. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 25 +------------------------ 1 file changed, 1 insertion(+), 24 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 927d2007d5..f03a4180fa 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -65,14 +65,6 @@ static u32 nfs4_init; stateid_t zerostateid; /* bits all 0 */ stateid_t onestateid; /* bits all 1 */ -/* debug counters */ -u32 list_add_perfile = 0; -u32 list_del_perfile = 0; -u32 add_perclient = 0; -u32 del_perclient = 0; -u32 vfsopen = 0; -u32 vfsclose = 0; - /* forward declarations */ struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); @@ -192,7 +184,6 @@ nfs4_close_delegation(struct nfs4_delegation *dp) if (dp->dl_flock) setlease(filp, F_UNLCK, &dp->dl_flock); nfsd_close(filp); - vfsclose++; } /* Called under the state lock. */ @@ -1083,7 +1074,6 @@ alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, str list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); list_add(&sop->so_perclient, &clp->cl_perclient); - add_perclient++; sop->so_is_open_owner = 1; sop->so_id = current_ownerid++; sop->so_client = clp; @@ -1117,10 +1107,8 @@ unhash_stateowner(struct nfs4_stateowner *sop) list_del(&sop->so_idhash); list_del(&sop->so_strhash); - if (sop->so_is_open_owner) { + if (sop->so_is_open_owner) list_del(&sop->so_perclient); - del_perclient++; - } list_del(&sop->so_perlockowner); while (!list_empty(&sop->so_perfilestate)) { stp = list_entry(sop->so_perfilestate.next, @@ -1151,7 +1139,6 @@ init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open * INIT_LIST_HEAD(&stp->st_perfile); list_add(&stp->st_hash, &stateid_hashtbl[hashval]); list_add(&stp->st_perfilestate, &sop->so_perfilestate); - list_add_perfile++; list_add(&stp->st_perfile, &fp->fi_perfile); stp->st_stateowner = sop; stp->st_file = fp; @@ -1171,14 +1158,12 @@ release_stateid(struct nfs4_stateid *stp, int flags) struct file *filp = stp->st_vfs_file; list_del(&stp->st_hash); - list_del_perfile++; list_del(&stp->st_perfile); list_del(&stp->st_perfilestate); if (flags & OPEN_STATE) { release_stateid_lockowners(stp); stp->st_vfs_file = NULL; nfsd_close(filp); - vfsclose++; } else if (flags & LOCK_STATE) locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); kmem_cache_free(stateid_slab, stp); @@ -1645,7 +1630,6 @@ nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, return status; } } - vfsopen++; *stpp = stp; return 0; } @@ -2650,7 +2634,6 @@ alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struc INIT_LIST_HEAD(&stp->st_perlockowner); /* not used */ list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); list_add(&stp->st_perfile, &fp->fi_perfile); - list_add_perfile++; list_add(&stp->st_perfilestate, &sop->so_perfilestate); stp->st_stateowner = sop; stp->st_file = fp; @@ -3308,12 +3291,6 @@ __nfs4_state_shutdown(void) cancel_delayed_work(&laundromat_work); flush_scheduled_work(); nfs4_init = 0; - dprintk("NFSD: list_add_perfile %d list_del_perfile %d\n", - list_add_perfile, list_del_perfile); - dprintk("NFSD: add_perclient %d del_perclient %d\n", - add_perclient, del_perclient); - dprintk("NFSD: vfsopen %d vfsclose %d\n", - vfsopen, vfsclose); } void -- cgit v1.2.2 From 8beefa249371f55432394ac96864c83b0b309c28 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:08 -0700 Subject: [PATCH] nfsd4: rename nfs4_file fields Trivial renaming patch: I can never remember, while looking at various lists relating the nfsd4 state structures, which are the "heads" and which are items on other lists, or which structures are actually on the various lists. The following convention helps me: given structures foo and bar, with foo containing the head of a list of bars, use "bars" for the name of the head of the list contained in the struct foo, and use "per_foo" for the entries in the struct bars. Go ahead and do this for struct nfs4_file. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index f03a4180fa..a84a80e8c0 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -153,7 +153,7 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_f current_fh->fh_handle.fh_size); dp->dl_time = 0; atomic_set(&dp->dl_count, 1); - list_add(&dp->dl_del_perfile, &fp->fi_del_perfile); + list_add(&dp->dl_del_perfile, &fp->fi_delegations); list_add(&dp->dl_del_perclnt, &clp->cl_del_perclnt); return dp; } @@ -954,8 +954,8 @@ alloc_init_file(struct inode *ino) fp = kmem_cache_alloc(file_slab, GFP_KERNEL); if (fp) { INIT_LIST_HEAD(&fp->fi_hash); - INIT_LIST_HEAD(&fp->fi_perfile); - INIT_LIST_HEAD(&fp->fi_del_perfile); + INIT_LIST_HEAD(&fp->fi_stateids); + INIT_LIST_HEAD(&fp->fi_delegations); list_add(&fp->fi_hash, &file_hashtbl[hashval]); fp->fi_inode = igrab(ino); fp->fi_id = current_fileid++; @@ -974,7 +974,7 @@ release_all_files(void) while (!list_empty(&file_hashtbl[i])) { fp = list_entry(file_hashtbl[i].next, struct nfs4_file, fi_hash); /* this should never be more than once... */ - if (!list_empty(&fp->fi_perfile) || !list_empty(&fp->fi_del_perfile)) { + if (!list_empty(&fp->fi_stateids) || !list_empty(&fp->fi_delegations)) { printk("ERROR: release_all_files: file %p is open, creating dangling state !!!\n",fp); } release_file(fp); @@ -1139,7 +1139,7 @@ init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open * INIT_LIST_HEAD(&stp->st_perfile); list_add(&stp->st_hash, &stateid_hashtbl[hashval]); list_add(&stp->st_perfilestate, &sop->so_perfilestate); - list_add(&stp->st_perfile, &fp->fi_perfile); + list_add(&stp->st_perfile, &fp->fi_stateids); stp->st_stateowner = sop; stp->st_file = fp; stp->st_stateid.si_boot = boot_time; @@ -1204,7 +1204,7 @@ release_state_owner(struct nfs4_stateid *stp, int flag) if (sop->so_confirmed && list_empty(&sop->so_perfilestate)) move_to_close_lru(sop); /* unused nfs4_file's are releseed. XXX slab cache? */ - if (list_empty(&fp->fi_perfile) && list_empty(&fp->fi_del_perfile)) { + if (list_empty(&fp->fi_stateids) && list_empty(&fp->fi_delegations)) { release_file(fp); } } @@ -1294,7 +1294,7 @@ nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) fp = find_file(ino); if (fp) { /* Search for conflicting share reservations */ - list_for_each_entry(stp, &fp->fi_perfile, st_perfile) { + list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { if (test_bit(deny_type, &stp->st_deny_bmap) || test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) return nfserr_share_denied; @@ -1545,7 +1545,7 @@ find_delegation_file(struct nfs4_file *fp, stateid_t *stid) { struct nfs4_delegation *dp; - list_for_each_entry(dp, &fp->fi_del_perfile, dl_del_perfile) { + list_for_each_entry(dp, &fp->fi_delegations, dl_del_perfile) { if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) return dp; } @@ -1583,7 +1583,7 @@ nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_state int status = nfserr_share_denied; struct nfs4_stateowner *sop = open->op_stateowner; - list_for_each_entry(local, &fp->fi_perfile, st_perfile) { + list_for_each_entry(local, &fp->fi_stateids, st_perfile) { /* ignore lock owners */ if (local->st_stateowner->so_is_open_owner == 0) continue; @@ -1830,7 +1830,7 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf stp->st_stateid.si_fileid, stp->st_stateid.si_generation); out: /* take the opportunity to clean up unused state */ - if (fp && list_empty(&fp->fi_perfile) && list_empty(&fp->fi_del_perfile)) + if (fp && list_empty(&fp->fi_stateids) && list_empty(&fp->fi_delegations)) release_file(fp); /* CLAIM_PREVIOUS has different error returns */ @@ -2633,7 +2633,7 @@ alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struc INIT_LIST_HEAD(&stp->st_perfilestate); INIT_LIST_HEAD(&stp->st_perlockowner); /* not used */ list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); - list_add(&stp->st_perfile, &fp->fi_perfile); + list_add(&stp->st_perfile, &fp->fi_stateids); list_add(&stp->st_perfilestate, &sop->so_perfilestate); stp->st_stateowner = sop; stp->st_file = fp; -- cgit v1.2.2 From 13cd21845d6a9729ca95e36ae6e8c669623fbfd4 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:10 -0700 Subject: [PATCH] nfsd4: reference count struct nfs4_file Add a struct kref to each nfs4_file and take a reference to it from each stateid and delegation that refers to it. The atomicity guarantees are overkill given that all this stuff is done under the single nfsd4 state lock, but a) we'd like finer-grained locking some day, and b) this simplifies the cleanup of the structures a bit, something that has previously been a bit complicated and bug-prone. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 100 +++++++++++++++++++++++++++------------------------- 1 file changed, 51 insertions(+), 49 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index a84a80e8c0..6ba428afa4 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -111,7 +111,6 @@ opaque_hashval(const void *ptr, int nbytes) /* forward declarations */ static void release_stateowner(struct nfs4_stateowner *sop); static void release_stateid(struct nfs4_stateid *stp, int flags); -static void release_file(struct nfs4_file *fp); /* * Delegation state @@ -121,6 +120,27 @@ static void release_file(struct nfs4_file *fp); spinlock_t recall_lock; static struct list_head del_recall_lru; +static void +free_nfs4_file(struct kref *kref) +{ + struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref); + list_del(&fp->fi_hash); + iput(fp->fi_inode); + kmem_cache_free(file_slab, fp); +} + +static inline void +put_nfs4_file(struct nfs4_file *fi) +{ + kref_put(&fi->fi_ref, free_nfs4_file); +} + +static inline void +get_nfs4_file(struct nfs4_file *fi) +{ + kref_get(&fi->fi_ref); +} + static struct nfs4_delegation * alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) { @@ -136,6 +156,7 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_f INIT_LIST_HEAD(&dp->dl_del_perclnt); INIT_LIST_HEAD(&dp->dl_recall_lru); dp->dl_client = clp; + get_nfs4_file(fp); dp->dl_file = fp; dp->dl_flock = NULL; get_file(stp->st_vfs_file); @@ -163,6 +184,7 @@ nfs4_put_delegation(struct nfs4_delegation *dp) { if (atomic_dec_and_test(&dp->dl_count)) { dprintk("NFSD: freeing dp %p\n",dp); + put_nfs4_file(dp->dl_file); kmem_cache_free(deleg_slab, dp); } } @@ -953,6 +975,7 @@ alloc_init_file(struct inode *ino) fp = kmem_cache_alloc(file_slab, GFP_KERNEL); if (fp) { + kref_init(&fp->fi_ref); INIT_LIST_HEAD(&fp->fi_hash); INIT_LIST_HEAD(&fp->fi_stateids); INIT_LIST_HEAD(&fp->fi_delegations); @@ -964,24 +987,6 @@ alloc_init_file(struct inode *ino) return NULL; } -static void -release_all_files(void) -{ - int i; - struct nfs4_file *fp; - - for (i=0;ifi_stateids) || !list_empty(&fp->fi_delegations)) { - printk("ERROR: release_all_files: file %p is open, creating dangling state !!!\n",fp); - } - release_file(fp); - } - } -} - static void nfsd4_free_slab(kmem_cache_t **slab) { @@ -1141,6 +1146,7 @@ init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open * list_add(&stp->st_perfilestate, &sop->so_perfilestate); list_add(&stp->st_perfile, &fp->fi_stateids); stp->st_stateowner = sop; + get_nfs4_file(fp); stp->st_file = fp; stp->st_stateid.si_boot = boot_time; stp->st_stateid.si_stateownerid = sop->so_id; @@ -1166,18 +1172,11 @@ release_stateid(struct nfs4_stateid *stp, int flags) nfsd_close(filp); } else if (flags & LOCK_STATE) locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); + put_nfs4_file(stp->st_file); kmem_cache_free(stateid_slab, stp); stp = NULL; } -static void -release_file(struct nfs4_file *fp) -{ - list_del(&fp->fi_hash); - iput(fp->fi_inode); - kmem_cache_free(file_slab, fp); -} - void move_to_close_lru(struct nfs4_stateowner *sop) { @@ -1192,7 +1191,6 @@ void release_state_owner(struct nfs4_stateid *stp, int flag) { struct nfs4_stateowner *sop = stp->st_stateowner; - struct nfs4_file *fp = stp->st_file; dprintk("NFSD: release_state_owner\n"); release_stateid(stp, flag); @@ -1203,10 +1201,6 @@ release_state_owner(struct nfs4_stateid *stp, int flag) */ if (sop->so_confirmed && list_empty(&sop->so_perfilestate)) move_to_close_lru(sop); - /* unused nfs4_file's are releseed. XXX slab cache? */ - if (list_empty(&fp->fi_stateids) && list_empty(&fp->fi_delegations)) { - release_file(fp); - } } static int @@ -1236,8 +1230,10 @@ find_file(struct inode *ino) struct nfs4_file *fp; list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { - if (fp->fi_inode == ino) + if (fp->fi_inode == ino) { + get_nfs4_file(fp); return fp; + } } return NULL; } @@ -1288,19 +1284,24 @@ nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) struct inode *ino = current_fh->fh_dentry->d_inode; struct nfs4_file *fp; struct nfs4_stateid *stp; + int ret; dprintk("NFSD: nfs4_share_conflict\n"); fp = find_file(ino); - if (fp) { + if (!fp) + return nfs_ok; + ret = nfserr_share_denied; /* Search for conflicting share reservations */ - list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { - if (test_bit(deny_type, &stp->st_deny_bmap) || - test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) - return nfserr_share_denied; - } + list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { + if (test_bit(deny_type, &stp->st_deny_bmap) || + test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) + goto out; } - return nfs_ok; + ret = nfs_ok; +out: + put_nfs4_file(fp); + return ret; } static inline void @@ -1829,10 +1830,8 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, stp->st_stateid.si_fileid, stp->st_stateid.si_generation); out: - /* take the opportunity to clean up unused state */ - if (fp && list_empty(&fp->fi_stateids) && list_empty(&fp->fi_delegations)) - release_file(fp); - + if (fp) + put_nfs4_file(fp); /* CLAIM_PREVIOUS has different error returns */ nfs4_set_claim_prev(open, &status); /* @@ -2480,16 +2479,19 @@ find_stateid(stateid_t *stid, int flags) static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid) { - struct nfs4_file *fp = NULL; + struct nfs4_file *fp; + struct nfs4_delegation *dl; dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", stid->si_boot, stid->si_stateownerid, stid->si_fileid, stid->si_generation); fp = find_file(ino); - if (fp) - return find_delegation_file(fp, stid); - return NULL; + if (!fp) + return NULL; + dl = find_delegation_file(fp, stid); + put_nfs4_file(fp); + return dl; } /* @@ -2636,6 +2638,7 @@ alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struc list_add(&stp->st_perfile, &fp->fi_stateids); list_add(&stp->st_perfilestate, &sop->so_perfilestate); stp->st_stateowner = sop; + get_nfs4_file(fp); stp->st_file = fp; stp->st_stateid.si_boot = boot_time; stp->st_stateid.si_stateownerid = sop->so_id; @@ -3287,7 +3290,6 @@ __nfs4_state_shutdown(void) unhash_delegation(dp); } - release_all_files(); cancel_delayed_work(&laundromat_work); flush_scheduled_work(); nfs4_init = 0; -- cgit v1.2.2 From 7e06b7f9e9537cb826f3cff95816fc4384b67806 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:13 -0700 Subject: [PATCH] knfsd: nfs4: hold filp while reading or writing We're trying to read and write from a struct file that we may not hold a reference to any more (since a close could be processed as soon as we drop the state lock). Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4proc.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index ac4878ac22..d71f14517b 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -45,6 +45,7 @@ #include #include #include +#include #include #include @@ -477,26 +478,27 @@ static inline int nfsd4_read(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_read *read) { int status; - struct file *filp = NULL; /* no need to check permission - this will be done in nfsd_read() */ + read->rd_filp = NULL; if (read->rd_offset >= OFFSET_MAX) return nfserr_inval; nfs4_lock_state(); /* check stateid */ if ((status = nfs4_preprocess_stateid_op(current_fh, &read->rd_stateid, - CHECK_FH | RD_STATE, &filp))) { + CHECK_FH | RD_STATE, &read->rd_filp))) { dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); goto out; } + if (read->rd_filp) + get_file(read->rd_filp); status = nfs_ok; out: nfs4_unlock_state(); read->rd_rqstp = rqstp; read->rd_fhp = current_fh; - read->rd_filp = filp; return status; } @@ -633,6 +635,8 @@ nfsd4_write(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_writ dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); goto out; } + if (filp) + get_file(filp); nfs4_unlock_state(); write->wr_bytes_written = write->wr_buflen; @@ -644,6 +648,8 @@ nfsd4_write(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_writ status = nfsd_write(rqstp, current_fh, filp, write->wr_offset, write->wr_vec, write->wr_vlen, write->wr_buflen, &write->wr_how_written); + if (filp) + fput(filp); if (status == nfserr_symlink) status = nfserr_inval; @@ -932,6 +938,9 @@ encode_op: nfs4_put_stateowner(replay_owner); replay_owner = NULL; } + /* XXX Ugh, we need to get rid of this kind of special case: */ + if (op->opnum == OP_READ && op->u.read.rd_filp) + fput(op->u.read.rd_filp); } out: -- cgit v1.2.2 From 5ba266d6323e957588712f6a7d31252cd6b797bb Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:15 -0700 Subject: [PATCH] knfsd: nfsd4: fix probe_callback rpc_create_client was modified recently to do its own (synchronous) NULL ping of the server. We'd rather do that on our own, asynchronously, so that we don't have to block the nfsd thread doing the probe, and so that setclientid handling (hence, client mounts) can proceed normally whether the callback is succesful or not. (We can still function fine without the callback channel--we just won't be able to give out delegations till it's verified to work.) Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4callback.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 634465e9cf..38c3e1c47d 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -427,7 +427,7 @@ nfsd4_probe_callback(struct nfs4_client *clp) * XXX AUTH_UNIX only - need AUTH_GSS.... */ sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(addr.sin_addr.s_addr)); - clnt = rpc_create_client(xprt, hostname, program, 1, RPC_AUTH_UNIX); + clnt = rpc_new_client(xprt, hostname, program, 1, RPC_AUTH_UNIX); if (IS_ERR(clnt)) { dprintk("NFSD: couldn't create callback client\n"); goto out_err; -- cgit v1.2.2 From dfc8356570b6fcb4035c7d916ade5bbbe6c3b50a Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:16 -0700 Subject: [PATCH] knfsd: nfsd4: nfs4_check_open_reclaim cleanup Minor cleanup. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 6ba428afa4..2a5f00b0ee 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -3155,11 +3155,7 @@ nfs4_find_reclaim_client(clientid_t *clid) int nfs4_check_open_reclaim(clientid_t *clid) { - struct nfs4_client_reclaim *crp; - - if ((crp = nfs4_find_reclaim_client(clid)) == NULL) - return nfserr_reclaim_bad; - return nfs_ok; + return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; } -- cgit v1.2.2 From 58da282b733cff4caef805c6555c7a3b90772946 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:19 -0700 Subject: [PATCH] knfsd: nfsd4: create separate laundromat workqueue We're running the laundromat work on the default kevent worker thread. But the laundromat takes the nfsv4 state semaphore, which is used for way too much stuff, and the potential for deadlocks is high. Better to have this on a separate workqueue. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 2a5f00b0ee..9bec088e76 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -1844,6 +1844,7 @@ out: return status; } +static struct workqueue_struct *laundry_wq; static struct work_struct laundromat_work; static void laundromat_main(void *); static DECLARE_WORK(laundromat_work, laundromat_main, NULL); @@ -1951,7 +1952,7 @@ laundromat_main(void *not_used) t = nfs4_laundromat(); dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); - schedule_delayed_work(&laundromat_work, t*HZ); + queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); } /* search ownerid_hashtbl[] and close_lru for stateid owner @@ -3211,7 +3212,8 @@ __nfs4_state_init(void) printk("NFSD: starting %ld-second grace period\n", grace_time); grace_end = boot_time + grace_time; INIT_WORK(&laundromat_work,laundromat_main, NULL); - schedule_delayed_work(&laundromat_work, NFSD_LEASE_TIME*HZ); + laundry_wq = create_singlethread_workqueue("nfsd4"); + queue_delayed_work(laundry_wq, &laundromat_work, NFSD_LEASE_TIME*HZ); } int @@ -3287,7 +3289,8 @@ __nfs4_state_shutdown(void) } cancel_delayed_work(&laundromat_work); - flush_scheduled_work(); + flush_workqueue(laundry_wq); + destroy_workqueue(laundry_wq); nfs4_init = 0; } -- cgit v1.2.2 From d99a05adf8490cc171b7709554936b8f3ac9e362 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:21 -0700 Subject: [PATCH] knfsd: nfsd4: simplify lease changing The only way the protocol gives to change the lease time on the fly is to simulate a reboot. We don't have that completely right in the current code; among other things, we should probably put lockd in grace too while we do this. For now, let's just keep this simple, and wait till the next time nfsd starts to register any changes in lease time. If the administrator really wants to change the lease time *now*, they can go ahead and bring nfsd down and then back up again after changing the lease time. Also remove the "if (reclaim_str_hashtbl_size == 0)" case, a shortcut which skips the grace period if we know of no clients in need of recovery. This isn't going to work well with nlm. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 63 ++++++++++------------------------------------------- 1 file changed, 12 insertions(+), 51 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 9bec088e76..16c9a43218 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -53,7 +53,7 @@ /* Globals */ static time_t lease_time = 90; /* default lease time */ -static time_t old_lease_time = 90; /* past incarnation lease time */ +static time_t user_lease_time = 90; static u32 nfs4_reclaim_init = 0; time_t boot_time; static time_t grace_end = 0; @@ -3205,11 +3205,9 @@ __nfs4_state_init(void) INIT_LIST_HEAD(&del_recall_lru); spin_lock_init(&recall_lock); boot_time = get_seconds(); - grace_time = max(old_lease_time, lease_time); - if (reclaim_str_hashtbl_size == 0) - grace_time = 0; - if (grace_time) - printk("NFSD: starting %ld-second grace period\n", grace_time); + grace_time = max(user_lease_time, lease_time); + lease_time = user_lease_time; + printk("NFSD: starting %ld-second grace period\n", grace_time); grace_end = boot_time + grace_time; INIT_WORK(&laundromat_work,laundromat_main, NULL); laundry_wq = create_singlethread_workqueue("nfsd4"); @@ -3307,53 +3305,16 @@ nfs4_state_shutdown(void) /* * Called when leasetime is changed. * - * if nfsd is not started, simply set the global lease. - * - * if nfsd(s) are running, lease change requires nfsv4 state to be reset. - * e.g: boot_time is reset, existing nfs4_client structs are - * used to fill reclaim_str_hashtbl, then all state (except for the - * reclaim_str_hashtbl) is re-initialized. - * - * if the old lease time is greater than the new lease time, the grace - * period needs to be set to the old lease time to allow clients to reclaim - * their state. XXX - we may want to set the grace period == lease time - * after an initial grace period == old lease time - * - * if an error occurs in this process, the new lease is set, but the server - * will not honor OPEN or LOCK reclaims, and will return nfserr_no_grace - * which means OPEN/LOCK/READ/WRITE will fail during grace period. - * - * clients will attempt to reset all state with SETCLIENTID/CONFIRM, and - * OPEN and LOCK reclaims. + * The only way the protocol gives us to handle on-the-fly lease changes is to + * simulate a reboot. Instead of doing that, we just wait till the next time + * we start to register any changes in lease time. If the administrator + * really wants to change the lease time *now*, they can go ahead and bring + * nfsd down and then back up again after changing the lease time. */ void nfs4_reset_lease(time_t leasetime) { - struct nfs4_client *clp; - int i; - - printk("NFSD: New leasetime %ld\n",leasetime); - if (!nfs4_init) - return; - nfs4_lock_state(); - old_lease_time = lease_time; - lease_time = leasetime; - - nfs4_release_reclaim(); - - /* populate reclaim_str_hashtbl with current confirmed nfs4_clientid */ - for (i = 0; i < CLIENT_HASH_SIZE; i++) { - list_for_each_entry(clp, &conf_id_hashtbl[i], cl_idhash) { - if (!nfs4_client_to_reclaim(clp->cl_name.data, - clp->cl_name.len)) { - nfs4_release_reclaim(); - goto init_state; - } - } - } -init_state: - __nfs4_state_shutdown(); - __nfs4_state_init(); - nfs4_unlock_state(); + lock_kernel(); + user_lease_time = leasetime; + unlock_kernel(); } - -- cgit v1.2.2 From 7b190fecfa33d72bcf74c9473134c2ad14ae9545 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:23 -0700 Subject: [PATCH] knfsd: nfsd4: delegation recovery Allow recovery of delegations after reboot. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 36 ++++++++++++++++++++++++++++-------- fs/nfsd/nfs4xdr.c | 2 +- 2 files changed, 29 insertions(+), 9 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 16c9a43218..0f6119714c 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -1709,14 +1709,30 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta int status, flag = 0; flag = NFS4_OPEN_DELEGATE_NONE; - if (open->op_claim_type != NFS4_OPEN_CLAIM_NULL - || !atomic_read(&cb->cb_set) || !sop->so_confirmed) - goto out; - - if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) - flag = NFS4_OPEN_DELEGATE_WRITE; - else - flag = NFS4_OPEN_DELEGATE_READ; + open->op_recall = 0; + switch (open->op_claim_type) { + case NFS4_OPEN_CLAIM_PREVIOUS: + if (!atomic_read(&cb->cb_set)) + open->op_recall = 1; + flag = open->op_delegate_type; + if (flag == NFS4_OPEN_DELEGATE_NONE) + goto out; + break; + case NFS4_OPEN_CLAIM_NULL: + /* Let's not give out any delegations till everyone's + * had the chance to reclaim theirs.... */ + if (nfs4_in_grace()) + goto out; + if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) + goto out; + if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) + flag = NFS4_OPEN_DELEGATE_WRITE; + else + flag = NFS4_OPEN_DELEGATE_READ; + break; + default: + goto out; + } dp = alloc_init_deleg(sop->so_client, stp, fh, flag); if (dp == NULL) { @@ -1750,6 +1766,10 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta dp->dl_stateid.si_fileid, dp->dl_stateid.si_generation); out: + if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS + && flag == NFS4_OPEN_DELEGATE_NONE + && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) + printk("NFSD: WARNING: refusing delegation reclaim\n"); open->op_delegate_type = flag; } diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 0ae1467c3b..cfe978a72c 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -1972,7 +1972,7 @@ nfsd4_encode_open(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open case NFS4_OPEN_DELEGATE_READ: RESERVE_SPACE(20 + sizeof(stateid_t)); WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t)); - WRITE32(0); + WRITE32(open->op_recall); /* * TODO: ACE's in delegations -- cgit v1.2.2 From 76a3550ec50ed86885a10a767ebaebb7c9104721 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:26 -0700 Subject: [PATCH] knfsd: nfsd4: rename nfs4_state_init Somewhat gratuitous rename to simplify following patch. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 6 +++--- fs/nfsd/nfssvc.c | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 0f6119714c..e00b347285 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -3185,7 +3185,7 @@ nfs4_check_open_reclaim(clientid_t *clid) */ static void -__nfs4_state_init(void) +__nfs4_state_start(void) { int i; time_t grace_time; @@ -3235,7 +3235,7 @@ __nfs4_state_init(void) } int -nfs4_state_init(void) +nfs4_state_start(void) { int status; @@ -3244,7 +3244,7 @@ nfs4_state_init(void) status = nfsd4_init_slabs(); if (status) return status; - __nfs4_state_init(); + __nfs4_state_start(); nfs4_init = 1; return 0; } diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c index 904df604e8..07b9a065e9 100644 --- a/fs/nfsd/nfssvc.c +++ b/fs/nfsd/nfssvc.c @@ -95,7 +95,7 @@ nfsd_svc(unsigned short port, int nrservs) error = nfsd_racache_init(2*nrservs); if (error<0) goto out; - error = nfs4_state_init(); + error = nfs4_state_start(); if (error<0) goto out; if (!nfsd_serv) { -- cgit v1.2.2 From ac4d8ff2a57179de3ef7834c6ab3fac430b0a05d Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:30 -0700 Subject: [PATCH] knfsd: nfsd4: clean up state initialization Separate out stuff that needs initialization on startup from stuff that only needs initialization on module init from static data. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 35 +++++++++++++++++------------------ fs/nfsd/nfsctl.c | 1 + 2 files changed, 18 insertions(+), 18 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index e00b347285..1f68ce36e7 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -117,7 +117,7 @@ static void release_stateid(struct nfs4_stateid *stp, int flags); */ /* recall_lock protects the del_recall_lru */ -spinlock_t recall_lock; +spinlock_t recall_lock = SPIN_LOCK_UNLOCKED; static struct list_head del_recall_lru; static void @@ -3179,23 +3179,13 @@ nfs4_check_open_reclaim(clientid_t *clid) return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; } +/* initialization to perform at module load time: */ -/* - * Start and stop routines - */ - -static void -__nfs4_state_start(void) +void +nfs4_state_init(void) { int i; - time_t grace_time; - if (!nfs4_reclaim_init) { - for (i = 0; i < CLIENT_HASH_SIZE; i++) - INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); - reclaim_str_hashtbl_size = 0; - nfs4_reclaim_init = 1; - } for (i = 0; i < CLIENT_HASH_SIZE; i++) { INIT_LIST_HEAD(&conf_id_hashtbl[i]); INIT_LIST_HEAD(&conf_str_hashtbl[i]); @@ -3217,19 +3207,28 @@ __nfs4_state_start(void) INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); } - memset(&zerostateid, 0, sizeof(stateid_t)); memset(&onestateid, ~0, sizeof(stateid_t)); - INIT_LIST_HEAD(&close_lru); INIT_LIST_HEAD(&client_lru); INIT_LIST_HEAD(&del_recall_lru); - spin_lock_init(&recall_lock); + for (i = 0; i < CLIENT_HASH_SIZE; i++) + INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); + reclaim_str_hashtbl_size = 0; + nfs4_reclaim_init = 1; +} + +/* initialization to perform when the nfsd service is started: */ + +static void +__nfs4_state_start(void) +{ + time_t grace_time; + boot_time = get_seconds(); grace_time = max(user_lease_time, lease_time); lease_time = user_lease_time; printk("NFSD: starting %ld-second grace period\n", grace_time); grace_end = boot_time + grace_time; - INIT_WORK(&laundromat_work,laundromat_main, NULL); laundry_wq = create_singlethread_workqueue("nfsd4"); queue_delayed_work(laundry_wq, &laundromat_work, NFSD_LEASE_TIME*HZ); } diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 161afdcb8f..3d56531a7a 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -397,6 +397,7 @@ static int __init init_nfsd(void) nfsd_cache_init(); /* RPC reply cache */ nfsd_export_init(); /* Exports table */ nfsd_lockd_init(); /* lockd->nfsd callbacks */ + nfs4_state_init(); /* NFSv4 locking state */ #ifdef CONFIG_NFSD_V4 nfsd_idmap_init(); /* Name to ID mapping */ #endif /* CONFIG_NFSD_V4 */ -- cgit v1.2.2 From 707d4ab7b3aa6d1f7a7d2cd123fb83ba9a528205 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:32 -0700 Subject: [PATCH] knfsd: nfsd4: remove nfs4_reclaim_init nfs4_reclaim_init is no longer performing any useful function. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 1f68ce36e7..fb9b4eb430 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -54,7 +54,6 @@ /* Globals */ static time_t lease_time = 90; /* default lease time */ static time_t user_lease_time = 90; -static u32 nfs4_reclaim_init = 0; time_t boot_time; static time_t grace_end = 0; static u32 current_clientid = 1; @@ -3128,7 +3127,6 @@ nfs4_release_reclaim(void) struct nfs4_client_reclaim *crp = NULL; int i; - BUG_ON(!nfs4_reclaim_init); for (i = 0; i < CLIENT_HASH_SIZE; i++) { while (!list_empty(&reclaim_str_hashtbl[i])) { crp = list_entry(reclaim_str_hashtbl[i].next, @@ -3214,7 +3212,6 @@ nfs4_state_init(void) for (i = 0; i < CLIENT_HASH_SIZE; i++) INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); reclaim_str_hashtbl_size = 0; - nfs4_reclaim_init = 1; } /* initialization to perform when the nfsd service is started: */ -- cgit v1.2.2 From bd0b1e954e3ba3e5d2cab941458cf98206471bd2 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:35 -0700 Subject: [PATCH] knfsd: nfsd4: idmap initialization Adopt standard kernel style by defining a no-op function instead of putting ifdef's in the code where the function is called. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfsctl.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 3d56531a7a..3da43a3ed3 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -398,9 +398,7 @@ static int __init init_nfsd(void) nfsd_export_init(); /* Exports table */ nfsd_lockd_init(); /* lockd->nfsd callbacks */ nfs4_state_init(); /* NFSv4 locking state */ -#ifdef CONFIG_NFSD_V4 nfsd_idmap_init(); /* Name to ID mapping */ -#endif /* CONFIG_NFSD_V4 */ if (proc_mkdir("fs/nfs", NULL)) { struct proc_dir_entry *entry; entry = create_proc_entry("fs/nfs/exports", 0, NULL); @@ -427,9 +425,7 @@ static void __exit exit_nfsd(void) remove_proc_entry("fs/nfs", NULL); nfsd_stat_shutdown(); nfsd_lockd_shutdown(); -#ifdef CONFIG_NFSD_V4 nfsd_idmap_shutdown(); -#endif /* CONFIG_NFSD_V4 */ unregister_filesystem(&nfsd_fs_type); } -- cgit v1.2.2 From 7dea9d280c96f90382ec5d5709433e66a0993ec9 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:42 -0700 Subject: [PATCH] knfsd: nfsd4: setclientid simplification We can be a little more concise here. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 14 ++------------ 1 file changed, 2 insertions(+), 12 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index fb9b4eb430..2a59d176e6 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -674,23 +674,13 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) * or different ip_address */ status = nfserr_clid_inuse; - if (!cmp_creds(&clp->cl_cred,&rqstp->rq_cred)) { + if (!cmp_creds(&clp->cl_cred,&rqstp->rq_cred) + || clp->cl_addr != ip_addr) { printk("NFSD: setclientid: string in use by client" "(clientid %08x/%08x)\n", clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); goto out; } - if (clp->cl_addr != ip_addr) { - printk("NFSD: setclientid: string in use by client" - "(clientid %08x/%08x)\n", - clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); - goto out; - } - - /* - * cl_name match from a previous SETCLIENTID operation - * XXX check for additional matches? - */ conf = clp; break; } -- cgit v1.2.2 From a55370a3c0106106a975c5a09cee800611d0cf50 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:52 -0700 Subject: [PATCH] knfsd: nfsd4: reboot hash For the purposes of reboot recovery we keep a directory with subdirectories each having a name that is the ascii hex representation of the md5 sum of a client identifier for an active client. This adds the code to calculate that name. We also use it for the purposes of comparing clients, so if someone ever manages to find two client names that are md5 collisions, then we'll return clid_inuse to the second. Signed-off-by: Andy Adamson Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/Makefile | 2 +- fs/nfsd/nfs4recover.c | 97 +++++++++++++++++++++++++++++++++++++++++++++++++++ fs/nfsd/nfs4state.c | 80 ++++++++++++++++++++---------------------- 3 files changed, 136 insertions(+), 43 deletions(-) create mode 100644 fs/nfsd/nfs4recover.c (limited to 'fs/nfsd') diff --git a/fs/nfsd/Makefile b/fs/nfsd/Makefile index 9f043f44c9..ce341dc76d 100644 --- a/fs/nfsd/Makefile +++ b/fs/nfsd/Makefile @@ -10,5 +10,5 @@ nfsd-$(CONFIG_NFSD_V2_ACL) += nfs2acl.o nfsd-$(CONFIG_NFSD_V3) += nfs3proc.o nfs3xdr.o nfsd-$(CONFIG_NFSD_V3_ACL) += nfs3acl.o nfsd-$(CONFIG_NFSD_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4idmap.o \ - nfs4acl.o nfs4callback.o + nfs4acl.o nfs4callback.o nfs4recover.o nfsd-objs := $(nfsd-y) diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c new file mode 100644 index 0000000000..841a305d79 --- /dev/null +++ b/fs/nfsd/nfs4recover.c @@ -0,0 +1,97 @@ +/* +* linux/fs/nfsd/nfs4recover.c +* +* Copyright (c) 2004 The Regents of the University of Michigan. +* All rights reserved. +* +* Andy Adamson +* +* Redistribution and use in source and binary forms, with or without +* modification, are permitted provided that the following conditions +* are met: +* +* 1. Redistributions of source code must retain the above copyright +* notice, this list of conditions and the following disclaimer. +* 2. Redistributions in binary form must reproduce the above copyright +* notice, this list of conditions and the following disclaimer in the +* documentation and/or other materials provided with the distribution. +* 3. Neither the name of the University nor the names of its +* contributors may be used to endorse or promote products derived +* from this software without specific prior written permission. +* +* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED +* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR +* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +* +*/ + + +#include +#include +#include +#include +#include +#include +#include +#include + + +#define NFSDDBG_FACILITY NFSDDBG_PROC + +static void +md5_to_hex(char *out, char *md5) +{ + int i; + + for (i=0; i<16; i++) { + unsigned char c = md5[i]; + + *out++ = '0' + ((c&0xf0)>>4) + (c>=0xa0)*('a'-'9'-1); + *out++ = '0' + (c&0x0f) + ((c&0x0f)>=0x0a)*('a'-'9'-1); + } + *out = '\0'; +} + +int +nfs4_make_rec_clidname(char *dname, struct xdr_netobj *clname) +{ + struct xdr_netobj cksum; + struct crypto_tfm *tfm; + struct scatterlist sg[1]; + int status = nfserr_resource; + + dprintk("NFSD: nfs4_make_rec_clidname for %.*s\n", + clname->len, clname->data); + tfm = crypto_alloc_tfm("md5", 0); + if (tfm == NULL) + goto out; + cksum.len = crypto_tfm_alg_digestsize(tfm); + cksum.data = kmalloc(cksum.len, GFP_KERNEL); + if (cksum.data == NULL) + goto out; + crypto_digest_init(tfm); + + sg[0].page = virt_to_page(clname->data); + sg[0].offset = offset_in_page(clname->data); + sg[0].length = clname->len; + + crypto_digest_update(tfm, sg, 1); + crypto_digest_final(tfm, cksum.data); + + md5_to_hex(dname, cksum.data); + + kfree(cksum.data); + status = nfs_ok; +out: + if (tfm) + crypto_free_tfm(tfm); + return status; +} diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 2a59d176e6..0be0b37c84 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -231,8 +231,8 @@ unhash_delegation(struct nfs4_delegation *dp) #define clientid_hashval(id) \ ((id) & CLIENT_HASH_MASK) -#define clientstr_hashval(name, namelen) \ - (opaque_hashval((name), (namelen)) & CLIENT_HASH_MASK) +#define clientstr_hashval(name) \ + (opaque_hashval((name), 8) & CLIENT_HASH_MASK) /* * reclaim_str_hashtbl[] holds known client info from previous reset/reboot * used in reboot/reset lease grace period processing @@ -366,11 +366,12 @@ expire_client(struct nfs4_client *clp) } static struct nfs4_client * -create_client(struct xdr_netobj name) { +create_client(struct xdr_netobj name, char *recdir) { struct nfs4_client *clp; if (!(clp = alloc_client(name))) goto out; + memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); atomic_set(&clp->cl_count, 1); atomic_set(&clp->cl_callback.cb_set, 0); clp->cl_callback.cb_parsed = 0; @@ -403,11 +404,9 @@ copy_cred(struct svc_cred *target, struct svc_cred *source) { get_group_info(target->cr_group_info); } -static int -cmp_name(struct xdr_netobj *n1, struct xdr_netobj *n2) { - if (!n1 || !n2) - return 0; - return((n1->len == n2->len) && !memcmp(n1->data, n2->data, n2->len)); +static inline int +same_name(const char *n1, const char *n2) { + return 0 == memcmp(n1, n2, HEXDIR_LEN); } static int @@ -479,8 +478,7 @@ move_to_confirmed(struct nfs4_client *clp) list_del_init(&clp->cl_strhash); list_del_init(&clp->cl_idhash); list_add(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); - strhashval = clientstr_hashval(clp->cl_name.data, - clp->cl_name.len); + strhashval = clientstr_hashval(clp->cl_recdir); list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); renew_client(clp); } @@ -651,22 +649,27 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) unsigned int strhashval; struct nfs4_client * conf, * unconf, * new, * clp; int status; + char dname[HEXDIR_LEN]; status = nfserr_inval; if (!check_name(clname)) goto out; + status = nfs4_make_rec_clidname(dname, &clname); + if (status) + goto out; + /* * XXX The Duplicate Request Cache (DRC) has been checked (??) * We get here on a DRC miss. */ - strhashval = clientstr_hashval(clname.data, clname.len); + strhashval = clientstr_hashval(dname); conf = NULL; nfs4_lock_state(); list_for_each_entry(clp, &conf_str_hashtbl[strhashval], cl_strhash) { - if (!cmp_name(&clp->cl_name, &clname)) + if (!same_name(clp->cl_recdir, dname)) continue; /* * CASE 0: @@ -686,7 +689,7 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) } unconf = NULL; list_for_each_entry(clp, &unconf_str_hashtbl[strhashval], cl_strhash) { - if (!cmp_name(&clp->cl_name, &clname)) + if (!same_name(clp->cl_recdir, dname)) continue; /* cl_name match from a previous SETCLIENTID operation */ unconf = clp; @@ -700,7 +703,8 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) */ if (unconf) expire_client(unconf); - if (!(new = create_client(clname))) + new = create_client(clname, dname); + if (new == NULL) goto out; copy_verf(new, &clverifier); new->cl_addr = ip_addr; @@ -728,7 +732,8 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) cmp_clid(&unconf->cl_clientid, &conf->cl_clientid)) { expire_client(unconf); } - if (!(new = create_client(clname))) + new = create_client(clname, dname); + if (new == NULL) goto out; copy_verf(new,&conf->cl_verifier); new->cl_addr = ip_addr; @@ -746,7 +751,8 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) * using input clverifier, clname, and callback info * and generate a new cl_clientid and cl_confirm. */ - if (!(new = create_client(clname))) + new = create_client(clname, dname); + if (new == NULL) goto out; copy_verf(new,&clverifier); new->cl_addr = ip_addr; @@ -772,7 +778,8 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) * new cl_verifier and a new cl_confirm */ expire_client(unconf); - if (!(new = create_client(clname))) + new = create_client(clname, dname); + if (new == NULL) goto out; copy_verf(new,&clverifier); new->cl_addr = ip_addr; @@ -856,7 +863,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi if ((conf && unconf) && (cmp_verf(&unconf->cl_confirm, &confirm)) && (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) && - (cmp_name(&conf->cl_name,&unconf->cl_name)) && + (same_name(conf->cl_recdir,unconf->cl_recdir)) && (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) { if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred)) status = nfserr_clid_inuse; @@ -876,7 +883,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi if ((conf && !unconf) || ((conf && unconf) && (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) || - !cmp_name(&conf->cl_name, &unconf->cl_name)))) { + !same_name(conf->cl_recdir, unconf->cl_recdir)))) { if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) { status = nfserr_clid_inuse; } else { @@ -3074,39 +3081,28 @@ out: } static inline struct nfs4_client_reclaim * -alloc_reclaim(int namelen) +alloc_reclaim(void) { - struct nfs4_client_reclaim *crp = NULL; - - crp = kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); - if (!crp) - return NULL; - crp->cr_name.data = kmalloc(namelen, GFP_KERNEL); - if (!crp->cr_name.data) { - kfree(crp); - return NULL; - } - return crp; + return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); } /* * failure => all reset bets are off, nfserr_no_grace... */ static int -nfs4_client_to_reclaim(char *name, int namlen) +nfs4_client_to_reclaim(char *name) { unsigned int strhashval; struct nfs4_client_reclaim *crp = NULL; - dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", namlen, name); - crp = alloc_reclaim(namlen); + dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); + crp = alloc_reclaim(); if (!crp) return 0; - strhashval = clientstr_hashval(name, namlen); + strhashval = clientstr_hashval(name); INIT_LIST_HEAD(&crp->cr_strhash); list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); - memcpy(crp->cr_name.data, name, namlen); - crp->cr_name.len = namlen; + memcpy(crp->cr_recdir, name, HEXDIR_LEN); reclaim_str_hashtbl_size++; return 1; } @@ -3122,7 +3118,6 @@ nfs4_release_reclaim(void) crp = list_entry(reclaim_str_hashtbl[i].next, struct nfs4_client_reclaim, cr_strhash); list_del(&crp->cr_strhash); - kfree(crp->cr_name.data); kfree(crp); reclaim_str_hashtbl_size--; } @@ -3145,13 +3140,14 @@ nfs4_find_reclaim_client(clientid_t *clid) if (clp == NULL) return NULL; - dprintk("NFSD: nfs4_find_reclaim_client for %.*s\n", - clp->cl_name.len, clp->cl_name.data); + dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", + clp->cl_name.len, clp->cl_name.data, + clp->cl_recdir); /* find clp->cl_name in reclaim_str_hashtbl */ - strhashval = clientstr_hashval(clp->cl_name.data, clp->cl_name.len); + strhashval = clientstr_hashval(clp->cl_recdir); list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { - if (cmp_name(&crp->cr_name, &clp->cl_name)) { + if (same_name(crp->cr_recdir, clp->cl_recdir)) { return crp; } } -- cgit v1.2.2 From 28ce6054f1de89834e5e9522f9e451cd88a35f85 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:03:56 -0700 Subject: [PATCH] knfsd: nfsd4: add find_{un}conf_by_str functions to simplify setclientid Minor setclientid cleanup Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 49 +++++++++++++++++++++++++++++++------------------ 1 file changed, 31 insertions(+), 18 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 0be0b37c84..72f2b6fdae 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -509,6 +509,30 @@ find_unconfirmed_client(clientid_t *clid) return NULL; } +static struct nfs4_client * +find_confirmed_client_by_str(const char *dname, unsigned int hashval) +{ + struct nfs4_client *clp; + + list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { + if (same_name(clp->cl_recdir, dname)) + return clp; + } + return NULL; +} + +static struct nfs4_client * +find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) +{ + struct nfs4_client *clp; + + list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { + if (same_name(clp->cl_recdir, dname)) + return clp; + } + return NULL; +} + /* a helper function for parse_callback */ static int parse_octet(unsigned int *lenp, char **addrp) @@ -647,7 +671,7 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) }; nfs4_verifier clverifier = setclid->se_verf; unsigned int strhashval; - struct nfs4_client * conf, * unconf, * new, * clp; + struct nfs4_client *conf, *unconf, *new; int status; char dname[HEXDIR_LEN]; @@ -666,35 +690,24 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) strhashval = clientstr_hashval(dname); - conf = NULL; nfs4_lock_state(); - list_for_each_entry(clp, &conf_str_hashtbl[strhashval], cl_strhash) { - if (!same_name(clp->cl_recdir, dname)) - continue; + conf = find_confirmed_client_by_str(dname, strhashval); + if (conf) { /* * CASE 0: * clname match, confirmed, different principal * or different ip_address */ status = nfserr_clid_inuse; - if (!cmp_creds(&clp->cl_cred,&rqstp->rq_cred) - || clp->cl_addr != ip_addr) { + if (!cmp_creds(&conf->cl_cred, &rqstp->rq_cred) + || conf->cl_addr != ip_addr) { printk("NFSD: setclientid: string in use by client" "(clientid %08x/%08x)\n", - clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); + conf->cl_clientid.cl_boot, conf->cl_clientid.cl_id); goto out; } - conf = clp; - break; - } - unconf = NULL; - list_for_each_entry(clp, &unconf_str_hashtbl[strhashval], cl_strhash) { - if (!same_name(clp->cl_recdir, dname)) - continue; - /* cl_name match from a previous SETCLIENTID operation */ - unconf = clp; - break; } + unconf = find_unconfirmed_client_by_str(dname, strhashval); status = nfserr_resource; if (!conf) { /* -- cgit v1.2.2 From a76b4319ca85b5e3a8098470c623a272d40271cd Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:04:01 -0700 Subject: [PATCH] knfsd: nfsd4: grace period end For the purposes of reboot recovery, we want to do some work during the transition period at the end of the grace period. Some of that work must be guaranteed to have a certain relationship with the end of the grace period, so we want to control the transition there. Our approach is to modify the in_grace() checks to consult a global variable instead of checking the time directly, to schedule the first run of the laundromat thread at the end of the grace period, and to set the global end-of-grace-period there. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 72f2b6fdae..1b2f67f5ee 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -55,7 +55,7 @@ static time_t lease_time = 90; /* default lease time */ static time_t user_lease_time = 90; time_t boot_time; -static time_t grace_end = 0; +static int in_grace = 1; static u32 current_clientid = 1; static u32 current_ownerid = 1; static u32 current_fileid = 1; @@ -1908,6 +1908,13 @@ out: return status; } +static void +end_grace(void) +{ + dprintk("NFSD: end of grace period\n"); + in_grace = 0; +} + time_t nfs4_laundromat(void) { @@ -1922,6 +1929,8 @@ nfs4_laundromat(void) nfs4_lock_state(); dprintk("NFSD: laundromat service - starting\n"); + if (in_grace) + end_grace(); list_for_each_safe(pos, next, &client_lru) { clp = list_entry(pos, struct nfs4_client, cl_lru); if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { @@ -3223,10 +3232,10 @@ __nfs4_state_start(void) boot_time = get_seconds(); grace_time = max(user_lease_time, lease_time); lease_time = user_lease_time; + in_grace = 1; printk("NFSD: starting %ld-second grace period\n", grace_time); - grace_end = boot_time + grace_time; laundry_wq = create_singlethread_workqueue("nfsd4"); - queue_delayed_work(laundry_wq, &laundromat_work, NFSD_LEASE_TIME*HZ); + queue_delayed_work(laundry_wq, &laundromat_work, grace_time*HZ); } int @@ -3247,14 +3256,7 @@ nfs4_state_start(void) int nfs4_in_grace(void) { - return get_seconds() < grace_end; -} - -void -set_no_grace(void) -{ - printk("NFSD: ERROR in reboot recovery. State reclaims will fail.\n"); - grace_end = get_seconds(); + return in_grace; } time_t -- cgit v1.2.2 From fd39ca9a808c6026989bc2188868a0574eb37108 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:04:03 -0700 Subject: [PATCH] knfsd: nfsd4: make needlessly global code static This patch contains the following possible cleanups: - make needlessly global code static Signed-off-by: Adrian Bunk Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4acl.c | 4 ++-- fs/nfsd/nfs4callback.c | 7 +++---- fs/nfsd/nfs4idmap.c | 12 +++++------ fs/nfsd/nfs4state.c | 57 ++++++++++++++++++++++++++------------------------ fs/nfsd/nfs4xdr.c | 4 ++-- 5 files changed, 43 insertions(+), 41 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4acl.c b/fs/nfsd/nfs4acl.c index 11ebf6c4aa..4a2105552a 100644 --- a/fs/nfsd/nfs4acl.c +++ b/fs/nfsd/nfs4acl.c @@ -125,7 +125,7 @@ static short ace2type(struct nfs4_ace *); static int _posix_to_nfsv4_one(struct posix_acl *, struct nfs4_acl *, unsigned int); static struct posix_acl *_nfsv4_to_posix_one(struct nfs4_acl *, unsigned int); int nfs4_acl_add_ace(struct nfs4_acl *, u32, u32, u32, int, uid_t); -int nfs4_acl_split(struct nfs4_acl *, struct nfs4_acl *); +static int nfs4_acl_split(struct nfs4_acl *, struct nfs4_acl *); struct nfs4_acl * nfs4_acl_posix_to_nfsv4(struct posix_acl *pacl, struct posix_acl *dpacl, @@ -775,7 +775,7 @@ out_err: return pacl; } -int +static int nfs4_acl_split(struct nfs4_acl *acl, struct nfs4_acl *dacl) { struct list_head *h, *n; diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 38c3e1c47d..68bb245491 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -54,7 +54,6 @@ /* declarations */ static void nfs4_cb_null(struct rpc_task *task); -extern spinlock_t recall_lock; /* Index of predefined Linux callback client operations */ @@ -329,12 +328,12 @@ out: .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2, \ } -struct rpc_procinfo nfs4_cb_procedures[] = { +static struct rpc_procinfo nfs4_cb_procedures[] = { PROC(CB_NULL, NULL, enc_cb_null, dec_cb_null), PROC(CB_RECALL, COMPOUND, enc_cb_recall, dec_cb_recall), }; -struct rpc_version nfs_cb_version4 = { +static struct rpc_version nfs_cb_version4 = { .number = 1, .nrprocs = sizeof(nfs4_cb_procedures)/sizeof(nfs4_cb_procedures[0]), .procs = nfs4_cb_procedures @@ -348,7 +347,7 @@ static struct rpc_version * nfs_cb_version[] = { /* * Use the SETCLIENTID credential */ -struct rpc_cred * +static struct rpc_cred * nfsd4_lookupcred(struct nfs4_client *clp, int taskflags) { struct auth_cred acred; diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c index 4ba540841c..5605a26efc 100644 --- a/fs/nfsd/nfs4idmap.c +++ b/fs/nfsd/nfs4idmap.c @@ -104,7 +104,7 @@ ent_update(struct ent *new, struct ent *itm) ent_init(new, itm); } -void +static void ent_put(struct cache_head *ch, struct cache_detail *cd) { if (cache_put(ch, cd)) { @@ -186,7 +186,7 @@ warn_no_idmapd(struct cache_detail *detail) static int idtoname_parse(struct cache_detail *, char *, int); static struct ent *idtoname_lookup(struct ent *, int); -struct cache_detail idtoname_cache = { +static struct cache_detail idtoname_cache = { .hash_size = ENT_HASHMAX, .hash_table = idtoname_table, .name = "nfs4.idtoname", @@ -277,7 +277,7 @@ nametoid_hash(struct ent *ent) return hash_str(ent->name, ENT_HASHBITS); } -void +static void nametoid_request(struct cache_detail *cd, struct cache_head *ch, char **bpp, int *blen) { @@ -317,9 +317,9 @@ nametoid_show(struct seq_file *m, struct cache_detail *cd, struct cache_head *h) } static struct ent *nametoid_lookup(struct ent *, int); -int nametoid_parse(struct cache_detail *, char *, int); +static int nametoid_parse(struct cache_detail *, char *, int); -struct cache_detail nametoid_cache = { +static struct cache_detail nametoid_cache = { .hash_size = ENT_HASHMAX, .hash_table = nametoid_table, .name = "nfs4.nametoid", @@ -330,7 +330,7 @@ struct cache_detail nametoid_cache = { .warn_no_listener = warn_no_idmapd, }; -int +static int nametoid_parse(struct cache_detail *cd, char *buf, int buflen) { struct ent ent, *res; diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 1b2f67f5ee..8a5f777b1e 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -54,18 +54,21 @@ /* Globals */ static time_t lease_time = 90; /* default lease time */ static time_t user_lease_time = 90; -time_t boot_time; +static time_t boot_time; static int in_grace = 1; static u32 current_clientid = 1; static u32 current_ownerid = 1; static u32 current_fileid = 1; static u32 current_delegid = 1; static u32 nfs4_init; -stateid_t zerostateid; /* bits all 0 */ -stateid_t onestateid; /* bits all 1 */ +static stateid_t zerostateid; /* bits all 0 */ +static stateid_t onestateid; /* bits all 1 */ + +#define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) +#define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) /* forward declarations */ -struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); +static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); static void release_stateid_lockowners(struct nfs4_stateid *open_stp); @@ -77,10 +80,10 @@ static void release_stateid_lockowners(struct nfs4_stateid *open_stp); */ static DECLARE_MUTEX(client_sema); -kmem_cache_t *stateowner_slab = NULL; -kmem_cache_t *file_slab = NULL; -kmem_cache_t *stateid_slab = NULL; -kmem_cache_t *deleg_slab = NULL; +static kmem_cache_t *stateowner_slab = NULL; +static kmem_cache_t *file_slab = NULL; +static kmem_cache_t *stateid_slab = NULL; +static kmem_cache_t *deleg_slab = NULL; void nfs4_lock_state(void) @@ -116,7 +119,7 @@ static void release_stateid(struct nfs4_stateid *stp, int flags); */ /* recall_lock protects the del_recall_lru */ -spinlock_t recall_lock = SPIN_LOCK_UNLOCKED; +static spinlock_t recall_lock = SPIN_LOCK_UNLOCKED; static struct list_head del_recall_lru; static void @@ -456,7 +459,7 @@ check_name(struct xdr_netobj name) { return 1; } -void +static void add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) { unsigned int idhashval; @@ -468,7 +471,7 @@ add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) clp->cl_time = get_seconds(); } -void +static void move_to_confirmed(struct nfs4_client *clp) { unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); @@ -567,7 +570,7 @@ parse_octet(unsigned int *lenp, char **addrp) } /* parse and set the setclientid ipv4 callback address */ -int +static int parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) { int temp = 0; @@ -603,7 +606,7 @@ parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigne return 1; } -void +static void gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) { struct nfs4_callback *cb = &clp->cl_callback; @@ -1186,7 +1189,7 @@ release_stateid(struct nfs4_stateid *stp, int flags) stp = NULL; } -void +static void move_to_close_lru(struct nfs4_stateowner *sop) { dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); @@ -1196,7 +1199,7 @@ move_to_close_lru(struct nfs4_stateowner *sop) sop->so_time = get_seconds(); } -void +static void release_state_owner(struct nfs4_stateid *stp, int flag) { struct nfs4_stateowner *sop = stp->st_stateowner; @@ -1250,7 +1253,7 @@ find_file(struct inode *ino) #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0) #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0) -void +static void set_access(unsigned int *access, unsigned long bmap) { int i; @@ -1261,7 +1264,7 @@ set_access(unsigned int *access, unsigned long bmap) { } } -void +static void set_deny(unsigned int *deny, unsigned long bmap) { int i; @@ -1287,7 +1290,7 @@ test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { * Called to check deny when READ with all zero stateid or * WRITE with all zero or all one stateid */ -int +static int nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) { struct inode *ino = current_fh->fh_dentry->d_inode; @@ -1442,7 +1445,7 @@ int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) return -EAGAIN; } -struct lock_manager_operations nfsd_lease_mng_ops = { +static struct lock_manager_operations nfsd_lease_mng_ops = { .fl_break = nfsd_break_deleg_cb, .fl_release_private = nfsd_release_deleg_cb, .fl_copy_lock = nfsd_copy_lock_deleg_cb, @@ -1915,7 +1918,7 @@ end_grace(void) in_grace = 0; } -time_t +static time_t nfs4_laundromat(void) { struct nfs4_client *clp; @@ -1996,7 +1999,7 @@ laundromat_main(void *not_used) /* search ownerid_hashtbl[] and close_lru for stateid owner * (stateid->si_stateownerid) */ -struct nfs4_stateowner * +static struct nfs4_stateowner * find_openstateowner_id(u32 st_id, int flags) { struct nfs4_stateowner *local = NULL; @@ -2170,7 +2173,7 @@ out: /* * Checks for sequence id mutating operations. */ -int +static int nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, clientid_t *lockclid) { int status; @@ -2486,7 +2489,7 @@ static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; -struct nfs4_stateid * +static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags) { struct nfs4_stateid *local = NULL; @@ -2550,7 +2553,7 @@ nfs4_transform_lock_offset(struct file_lock *lock) lock->fl_end = OFFSET_MAX; } -int +static int nfs4_verify_lock_stateowner(struct nfs4_stateowner *sop, unsigned int hashval) { struct nfs4_stateowner *local = NULL; @@ -2660,7 +2663,7 @@ alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, str return sop; } -struct nfs4_stateid * +static struct nfs4_stateid * alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) { struct nfs4_stateid *stp; @@ -2691,7 +2694,7 @@ out: return stp; } -int +static int check_lock_length(u64 offset, u64 length) { return ((length == 0) || ((length != ~(u64)0) && @@ -3149,7 +3152,7 @@ nfs4_release_reclaim(void) /* * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ -struct nfs4_client_reclaim * +static struct nfs4_client_reclaim * nfs4_find_reclaim_client(clientid_t *clid) { unsigned int strhashval; diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index cfe978a72c..91fb171d2a 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -136,7 +136,7 @@ xdr_error: \ } \ } while (0) -u32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes) +static u32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes) { /* We want more bytes than seem to be available. * Maybe we need a new page, maybe we have just run out @@ -190,7 +190,7 @@ defer_free(struct nfsd4_compoundargs *argp, return 0; } -char *savemem(struct nfsd4_compoundargs *argp, u32 *p, int nbytes) +static char *savemem(struct nfsd4_compoundargs *argp, u32 *p, int nbytes) { void *new = NULL; if (p == argp->tmp) { -- cgit v1.2.2 From 31f4a6c127f619886bf97f643e546f7788248f3f Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:04:06 -0700 Subject: [PATCH] knfsd: nfsd4: fix uncomfirmed list Setclientid code assumes there is only one match in unconfirmed list. Make sure that assumption holds. From: Fred Isaman Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 8a5f777b1e..67a038dc0d 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -743,10 +743,13 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) * nfs4_client, but with the new callback info and a * new cl_confirm */ - if ((unconf) && - cmp_verf(&unconf->cl_verifier, &conf->cl_verifier) && - cmp_clid(&unconf->cl_clientid, &conf->cl_clientid)) { - expire_client(unconf); + if (unconf) { + /* Note this is removing unconfirmed {*x***}, + * which is stronger than RFC recommended {vxc**}. + * This has the advantage that there is at most + * one {*x***} in either list at any time. + */ + expire_client(unconf); } new = create_client(clname, dname); if (new == NULL) -- cgit v1.2.2 From 1a69c179a28a9bb9f4d086927b192d5cffe88e50 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:04:08 -0700 Subject: [PATCH] knfsd: nfsd4: fix setclientid_confirm cases Setclientid_confirm code confused states 1 and 3 (numbering from the IMPLEMENTATION section of rfc3530, section 14.2.33). Fix this. State 1 allows the client to change the callback channel on the fly. We don't implement this currently, so just turn off the callback channel in this case. From: Fred Isaman Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 67a038dc0d..997343c230 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -887,10 +887,14 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred)) status = nfserr_clid_inuse; else { - expire_client(conf); - clp = unconf; - move_to_confirmed(unconf); + /* XXX: We just turn off callbacks until we can handle + * change request correctly. */ + clp = conf; + clp->cl_callback.cb_parsed = 0; + gen_confirm(clp); + expire_client(unconf); status = nfs_ok; + } goto out; } @@ -920,9 +924,16 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) { status = nfserr_clid_inuse; } else { - status = nfs_ok; + unsigned int hash = + clientstr_hashval(unconf->cl_recdir); + conf = find_confirmed_client_by_str(unconf->cl_recdir, + hash); + if (conf) { + expire_client(conf); + } clp = unconf; move_to_confirmed(unconf); + status = nfs_ok; } goto out; } -- cgit v1.2.2 From 22de4d837439071a0bec897485d3911383b6ffad Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:04:09 -0700 Subject: [PATCH] knfsd: nfsd4: fix setclientid_confirm error return NFS4_INVAL is not a valid error for setclientid_confirm, and INUSE is the more logical error here anyway. From: Fred Isaman Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 997343c230..2dc6da74cc 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -849,12 +849,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi nfs4_lock_state(); clp = find_confirmed_client(clid); if (clp) { - status = nfserr_inval; - /* - * Found a record for this clientid. If the IP addresses - * don't match, return ERR_INVAL just as if the record had - * not been found. - */ + status = nfserr_clid_inuse; if (clp->cl_addr != ip_addr) { printk("NFSD: setclientid: string in use by client" "(clientid %08x/%08x)\n", @@ -865,7 +860,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi } clp = find_unconfirmed_client(clid); if (clp) { - status = nfserr_inval; + status = nfserr_clid_inuse; if (clp->cl_addr != ip_addr) { printk("NFSD: setclientid: string in use by client" "(clientid %08x/%08x)\n", @@ -949,7 +944,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi goto out; } /* check that we have hit one of the cases...*/ - status = nfserr_inval; + status = nfserr_clid_inuse; goto out; out: if (!status) -- cgit v1.2.2 From 08e8987c37cd04d2df211c1e019d8f165d44266e Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:04:11 -0700 Subject: [PATCH] knfsd: nfsd4: setclientid_confirm gotoectomy Change from "goto" to "else if" format in setclientid_confirm. From: Fred Isaman Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 2dc6da74cc..9014dc2a63 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -891,14 +891,13 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi status = nfs_ok; } - goto out; } /* CASE 2: * conf record that matches input clientid. * if unconf record that matches input clientid, then unconf->cl_name * or unconf->cl_verifier don't match the conf record. */ - if ((conf && !unconf) || + else if ((conf && !unconf) || ((conf && unconf) && (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) || !same_name(conf->cl_recdir, unconf->cl_recdir)))) { @@ -908,14 +907,13 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi clp = conf; status = nfs_ok; } - goto out; } /* CASE 3: * conf record not found. * unconf record found. * unconf->cl_confirm matches input confirm */ - if (!conf && unconf && cmp_verf(&unconf->cl_confirm, &confirm)) { + else if (!conf && unconf && cmp_verf(&unconf->cl_confirm, &confirm)) { if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) { status = nfserr_clid_inuse; } else { @@ -930,7 +928,6 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi move_to_confirmed(unconf); status = nfs_ok; } - goto out; } /* CASE 4: * conf record not found, or if conf, then conf->cl_confirm does not @@ -938,14 +935,14 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi * unconf record not found, or if unconf, then unconf->cl_confirm * does not match input confirm. */ - if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) && + else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) && (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, &confirm)))) { status = nfserr_stale_clientid; - goto out; } - /* check that we have hit one of the cases...*/ - status = nfserr_clid_inuse; - goto out; + else { + /* check that we have hit one of the cases...*/ + status = nfserr_clid_inuse; + } out: if (!status) nfsd4_probe_callback(clp); -- cgit v1.2.2 From 7c79f7377cd4f2a50d51475f4c7966a3e60596a7 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:04:13 -0700 Subject: [PATCH] knfsd: nfsd4: setclientid_confirm comments Trivial whitespace and comment fixes. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 59 ++++++++++++++++++++++++++--------------------------- 1 file changed, 29 insertions(+), 30 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 9014dc2a63..f100eeab54 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -869,16 +869,16 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi } unconf = clp; } - /* CASE 1: - * unconf record that matches input clientid and input confirm. - * conf record that matches input clientid. - * conf and unconf records match names, verifiers - */ if ((conf && unconf) && (cmp_verf(&unconf->cl_confirm, &confirm)) && (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) && (same_name(conf->cl_recdir,unconf->cl_recdir)) && (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) { + /* CASE 1: + * unconf record that matches input clientid and input confirm. + * conf record that matches input clientid. + * conf and unconf records match names, verifiers + */ if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred)) status = nfserr_clid_inuse; else { @@ -891,29 +891,29 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi status = nfs_ok; } - } - /* CASE 2: - * conf record that matches input clientid. - * if unconf record that matches input clientid, then unconf->cl_name - * or unconf->cl_verifier don't match the conf record. - */ - else if ((conf && !unconf) || + } else if ((conf && !unconf) || ((conf && unconf) && (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) || !same_name(conf->cl_recdir, unconf->cl_recdir)))) { + /* CASE 2: + * conf record that matches input clientid. + * if unconf record matches input clientid, then + * unconf->cl_name or unconf->cl_verifier don't match the + * conf record. + */ if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) { status = nfserr_clid_inuse; } else { clp = conf; status = nfs_ok; } - } - /* CASE 3: - * conf record not found. - * unconf record found. - * unconf->cl_confirm matches input confirm - */ - else if (!conf && unconf && cmp_verf(&unconf->cl_confirm, &confirm)) { + } else if (!conf && unconf + && cmp_verf(&unconf->cl_confirm, &confirm)) { + /* CASE 3: + * conf record not found. + * unconf record found. + * unconf->cl_confirm matches input confirm + */ if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) { status = nfserr_clid_inuse; } else { @@ -928,18 +928,17 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi move_to_confirmed(unconf); status = nfs_ok; } - } - /* CASE 4: - * conf record not found, or if conf, then conf->cl_confirm does not - * match input confirm. - * unconf record not found, or if unconf, then unconf->cl_confirm - * does not match input confirm. - */ - else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) && - (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, &confirm)))) { + } else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) + && (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, + &confirm)))) { + /* CASE 4: + * conf record not found, or if conf, conf->cl_confirm does not + * match input confirm. + * unconf record not found, or if unconf, unconf->cl_confirm + * does not match input confirm. + */ status = nfserr_stale_clientid; - } - else { + } else { /* check that we have hit one of the cases...*/ status = nfserr_clid_inuse; } -- cgit v1.2.2 From 21ab45a480ec7705d177e959ebf452d62340c004 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:04:14 -0700 Subject: [PATCH] knfsd: nfsd4: miscellaneous setclientid_confirm cleanup Minor cleanup, remove some unnecessary printk's. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 49 +++++++++++++++++-------------------------------- 1 file changed, 17 insertions(+), 32 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index f100eeab54..8841151981 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -834,7 +834,7 @@ int nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm) { u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; - struct nfs4_client *clp, *conf = NULL, *unconf = NULL; + struct nfs4_client *conf, *unconf; nfs4_verifier confirm = setclientid_confirm->sc_confirm; clientid_t * clid = &setclientid_confirm->sc_clientid; int status; @@ -847,28 +847,16 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi */ nfs4_lock_state(); - clp = find_confirmed_client(clid); - if (clp) { - status = nfserr_clid_inuse; - if (clp->cl_addr != ip_addr) { - printk("NFSD: setclientid: string in use by client" - "(clientid %08x/%08x)\n", - clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); - goto out; - } - conf = clp; - } - clp = find_unconfirmed_client(clid); - if (clp) { - status = nfserr_clid_inuse; - if (clp->cl_addr != ip_addr) { - printk("NFSD: setclientid: string in use by client" - "(clientid %08x/%08x)\n", - clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); - goto out; - } - unconf = clp; - } + + conf = find_confirmed_client(clid); + unconf = find_unconfirmed_client(clid); + + status = nfserr_clid_inuse; + if (conf && conf->cl_addr != ip_addr) + goto out; + if (unconf && unconf->cl_addr != ip_addr) + goto out; + if ((conf && unconf) && (cmp_verf(&unconf->cl_confirm, &confirm)) && (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) && @@ -884,9 +872,8 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi else { /* XXX: We just turn off callbacks until we can handle * change request correctly. */ - clp = conf; - clp->cl_callback.cb_parsed = 0; - gen_confirm(clp); + conf->cl_callback.cb_parsed = 0; + gen_confirm(conf); expire_client(unconf); status = nfs_ok; @@ -901,12 +888,10 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi * unconf->cl_name or unconf->cl_verifier don't match the * conf record. */ - if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) { + if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) status = nfserr_clid_inuse; - } else { - clp = conf; + else status = nfs_ok; - } } else if (!conf && unconf && cmp_verf(&unconf->cl_confirm, &confirm)) { /* CASE 3: @@ -924,8 +909,8 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi if (conf) { expire_client(conf); } - clp = unconf; move_to_confirmed(unconf); + conf = unconf; status = nfs_ok; } } else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) @@ -944,7 +929,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi } out: if (!status) - nfsd4_probe_callback(clp); + nfsd4_probe_callback(conf); nfs4_unlock_state(); return status; } -- cgit v1.2.2 From ea1da636e956ad1591a74904f23d98bbc26a644b Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:04:17 -0700 Subject: [PATCH] knfsd: nfsd4: rename state list fields Trivial renaming patch: I can never remember, while looking at various lists relating the nfsd4 state structures, which are the "heads" and which are items on other lists, or which structures are actually on the various lists. The following convention helps me: given structures foo and bar, with foo containing the head of a list of bars, use "bars" for the name of the head of the list contained in the struct foo, and use "per_foo" for the entries in the struct bars. Already done for struct nfs4_file; go ahead and do it for the other nfsd4 state structures. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 78 ++++++++++++++++++++++++++--------------------------- 1 file changed, 39 insertions(+), 39 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 8841151981..22e76e3f06 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -154,8 +154,8 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_f dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); if (dp == NULL) return dp; - INIT_LIST_HEAD(&dp->dl_del_perfile); - INIT_LIST_HEAD(&dp->dl_del_perclnt); + INIT_LIST_HEAD(&dp->dl_perfile); + INIT_LIST_HEAD(&dp->dl_perclnt); INIT_LIST_HEAD(&dp->dl_recall_lru); dp->dl_client = clp; get_nfs4_file(fp); @@ -176,8 +176,8 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_f current_fh->fh_handle.fh_size); dp->dl_time = 0; atomic_set(&dp->dl_count, 1); - list_add(&dp->dl_del_perfile, &fp->fi_delegations); - list_add(&dp->dl_del_perclnt, &clp->cl_del_perclnt); + list_add(&dp->dl_perfile, &fp->fi_delegations); + list_add(&dp->dl_perclnt, &clp->cl_delegations); return dp; } @@ -214,8 +214,8 @@ nfs4_close_delegation(struct nfs4_delegation *dp) static void unhash_delegation(struct nfs4_delegation *dp) { - list_del_init(&dp->dl_del_perfile); - list_del_init(&dp->dl_del_perclnt); + list_del_init(&dp->dl_perfile); + list_del_init(&dp->dl_perclnt); spin_lock(&recall_lock); list_del_init(&dp->dl_recall_lru); spin_unlock(&recall_lock); @@ -345,11 +345,11 @@ expire_client(struct nfs4_client *clp) INIT_LIST_HEAD(&reaplist); spin_lock(&recall_lock); - while (!list_empty(&clp->cl_del_perclnt)) { - dp = list_entry(clp->cl_del_perclnt.next, struct nfs4_delegation, dl_del_perclnt); + while (!list_empty(&clp->cl_delegations)) { + dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); dprintk("NFSD: expire client. dp %p, fp %p\n", dp, dp->dl_flock); - list_del_init(&dp->dl_del_perclnt); + list_del_init(&dp->dl_perclnt); list_move(&dp->dl_recall_lru, &reaplist); } spin_unlock(&recall_lock); @@ -361,8 +361,8 @@ expire_client(struct nfs4_client *clp) list_del(&clp->cl_idhash); list_del(&clp->cl_strhash); list_del(&clp->cl_lru); - while (!list_empty(&clp->cl_perclient)) { - sop = list_entry(clp->cl_perclient.next, struct nfs4_stateowner, so_perclient); + while (!list_empty(&clp->cl_openowners)) { + sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); release_stateowner(sop); } put_nfs4_client(clp); @@ -380,8 +380,8 @@ create_client(struct xdr_netobj name, char *recdir) { clp->cl_callback.cb_parsed = 0; INIT_LIST_HEAD(&clp->cl_idhash); INIT_LIST_HEAD(&clp->cl_strhash); - INIT_LIST_HEAD(&clp->cl_perclient); - INIT_LIST_HEAD(&clp->cl_del_perclnt); + INIT_LIST_HEAD(&clp->cl_openowners); + INIT_LIST_HEAD(&clp->cl_delegations); INIT_LIST_HEAD(&clp->cl_lru); out: return clp; @@ -1074,13 +1074,13 @@ alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, str INIT_LIST_HEAD(&sop->so_idhash); INIT_LIST_HEAD(&sop->so_strhash); INIT_LIST_HEAD(&sop->so_perclient); - INIT_LIST_HEAD(&sop->so_perfilestate); - INIT_LIST_HEAD(&sop->so_perlockowner); /* not used */ + INIT_LIST_HEAD(&sop->so_stateids); + INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ INIT_LIST_HEAD(&sop->so_close_lru); sop->so_time = 0; list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); - list_add(&sop->so_perclient, &clp->cl_perclient); + list_add(&sop->so_perclient, &clp->cl_openowners); sop->so_is_open_owner = 1; sop->so_id = current_ownerid++; sop->so_client = clp; @@ -1098,10 +1098,10 @@ release_stateid_lockowners(struct nfs4_stateid *open_stp) { struct nfs4_stateowner *lock_sop; - while (!list_empty(&open_stp->st_perlockowner)) { - lock_sop = list_entry(open_stp->st_perlockowner.next, - struct nfs4_stateowner, so_perlockowner); - /* list_del(&open_stp->st_perlockowner); */ + while (!list_empty(&open_stp->st_lockowners)) { + lock_sop = list_entry(open_stp->st_lockowners.next, + struct nfs4_stateowner, so_perstateid); + /* list_del(&open_stp->st_lockowners); */ BUG_ON(lock_sop->so_is_open_owner); release_stateowner(lock_sop); } @@ -1116,10 +1116,10 @@ unhash_stateowner(struct nfs4_stateowner *sop) list_del(&sop->so_strhash); if (sop->so_is_open_owner) list_del(&sop->so_perclient); - list_del(&sop->so_perlockowner); - while (!list_empty(&sop->so_perfilestate)) { - stp = list_entry(sop->so_perfilestate.next, - struct nfs4_stateid, st_perfilestate); + list_del(&sop->so_perstateid); + while (!list_empty(&sop->so_stateids)) { + stp = list_entry(sop->so_stateids.next, + struct nfs4_stateid, st_perstateowner); if (sop->so_is_open_owner) release_stateid(stp, OPEN_STATE); else @@ -1141,11 +1141,11 @@ init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open * unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); INIT_LIST_HEAD(&stp->st_hash); - INIT_LIST_HEAD(&stp->st_perfilestate); - INIT_LIST_HEAD(&stp->st_perlockowner); + INIT_LIST_HEAD(&stp->st_perstateowner); + INIT_LIST_HEAD(&stp->st_lockowners); INIT_LIST_HEAD(&stp->st_perfile); list_add(&stp->st_hash, &stateid_hashtbl[hashval]); - list_add(&stp->st_perfilestate, &sop->so_perfilestate); + list_add(&stp->st_perstateowner, &sop->so_stateids); list_add(&stp->st_perfile, &fp->fi_stateids); stp->st_stateowner = sop; get_nfs4_file(fp); @@ -1167,7 +1167,7 @@ release_stateid(struct nfs4_stateid *stp, int flags) list_del(&stp->st_hash); list_del(&stp->st_perfile); - list_del(&stp->st_perfilestate); + list_del(&stp->st_perstateowner); if (flags & OPEN_STATE) { release_stateid_lockowners(stp); stp->st_vfs_file = NULL; @@ -1201,7 +1201,7 @@ release_state_owner(struct nfs4_stateid *stp, int flag) * released by the laundromat service after the lease period * to enable us to handle CLOSE replay */ - if (sop->so_confirmed && list_empty(&sop->so_perfilestate)) + if (sop->so_confirmed && list_empty(&sop->so_stateids)) move_to_close_lru(sop); } @@ -1548,7 +1548,7 @@ find_delegation_file(struct nfs4_file *fp, stateid_t *stid) { struct nfs4_delegation *dp; - list_for_each_entry(dp, &fp->fi_delegations, dl_del_perfile) { + list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) return dp; } @@ -1892,7 +1892,7 @@ nfsd4_renew(clientid_t *clid) } renew_client(clp); status = nfserr_cb_path_down; - if (!list_empty(&clp->cl_del_perclnt) + if (!list_empty(&clp->cl_delegations) && !atomic_read(&clp->cl_callback.cb_set)) goto out; status = nfs_ok; @@ -2634,13 +2634,13 @@ alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, str INIT_LIST_HEAD(&sop->so_idhash); INIT_LIST_HEAD(&sop->so_strhash); INIT_LIST_HEAD(&sop->so_perclient); - INIT_LIST_HEAD(&sop->so_perfilestate); - INIT_LIST_HEAD(&sop->so_perlockowner); + INIT_LIST_HEAD(&sop->so_stateids); + INIT_LIST_HEAD(&sop->so_perstateid); INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ sop->so_time = 0; list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); - list_add(&sop->so_perlockowner, &open_stp->st_perlockowner); + list_add(&sop->so_perstateid, &open_stp->st_lockowners); sop->so_is_open_owner = 0; sop->so_id = current_ownerid++; sop->so_client = clp; @@ -2664,11 +2664,11 @@ alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struc goto out; INIT_LIST_HEAD(&stp->st_hash); INIT_LIST_HEAD(&stp->st_perfile); - INIT_LIST_HEAD(&stp->st_perfilestate); - INIT_LIST_HEAD(&stp->st_perlockowner); /* not used */ + INIT_LIST_HEAD(&stp->st_perstateowner); + INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); list_add(&stp->st_perfile, &fp->fi_stateids); - list_add(&stp->st_perfilestate, &sop->so_perfilestate); + list_add(&stp->st_perstateowner, &sop->so_stateids); stp->st_stateowner = sop; get_nfs4_file(fp); stp->st_file = fp; @@ -3081,8 +3081,8 @@ nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner * /* check for any locks held by any stateid * associated with the (lock) stateowner */ status = nfserr_locks_held; - list_for_each_entry(stp, &local->so_perfilestate, - st_perfilestate) { + list_for_each_entry(stp, &local->so_stateids, + st_perstateowner) { if (check_for_locks(stp->st_vfs_file, local)) goto out; } -- cgit v1.2.2 From 3e9e3dbe0fe36c824ce2c5d7b05997c87a64bbdc Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:04:20 -0700 Subject: [PATCH] knfsd: nfsd4: allow multiple lockowners >From the language of rfc3530 section 8.1.3 (e.g., the suggestion that a "process id" might be a reasonable lockowner value) it's conceivable that a client might want to use the same lockowner string on multiple files, so we may as well allow that. We expect each use of open_to_lockowner to create a distinct seqid stream, though. For now we're also allowing multiple uses of open_to_lockowner with the same open, though it seems unlikely clients would actually do that. Also add a comment reminding myself of some very non-scalable data structures. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4state.c | 76 +++++++++++++++++++++++------------------------------ 1 file changed, 33 insertions(+), 43 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 22e76e3f06..26d00465c2 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -2583,22 +2583,6 @@ nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) deny->ld_type = NFS4_WRITE_LT; } -static struct nfs4_stateowner * -find_lockstateowner(struct xdr_netobj *owner, clientid_t *clid) -{ - struct nfs4_stateowner *local = NULL; - int i; - - for (i = 0; i < LOCK_HASH_SIZE; i++) { - list_for_each_entry(local, &lock_ownerid_hashtbl[i], so_idhash) { - if (!cmp_owner_str(local, owner, clid)) - continue; - return local; - } - } - return NULL; -} - static struct nfs4_stateowner * find_lockstateowner_str(struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) @@ -2697,7 +2681,7 @@ check_lock_length(u64 offset, u64 length) int nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock) { - struct nfs4_stateowner *lock_sop = NULL, *open_sop = NULL; + struct nfs4_stateowner *open_sop = NULL; struct nfs4_stateid *lock_stp; struct file *filp; struct file_lock file_lock; @@ -2756,16 +2740,9 @@ nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock strhashval = lock_ownerstr_hashval(fp->fi_inode, open_sop->so_client->cl_clientid.cl_id, &lock->v.new.owner); - /* - * If we already have this lock owner, the client is in - * error (or our bookeeping is wrong!) - * for asking for a 'new lock'. - */ - status = nfserr_bad_stateid; - lock_sop = find_lockstateowner(&lock->v.new.owner, - &lock->v.new.clientid); - if (lock_sop) - goto out; + /* XXX: Do we need to check for duplicate stateowners on + * the same file, or should they just be allowed (and + * create new stateids)? */ status = nfserr_resource; if (!(lock->lk_stateowner = alloc_init_lock_stateowner(strhashval, open_sop->so_client, open_stp, lock))) goto out; @@ -3056,8 +3033,11 @@ int nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner) { clientid_t *clid = &rlockowner->rl_clientid; - struct nfs4_stateowner *local = NULL; + struct nfs4_stateowner *sop; + struct nfs4_stateid *stp; struct xdr_netobj *owner = &rlockowner->rl_owner; + struct list_head matches; + int i; int status; dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", @@ -3073,22 +3053,32 @@ nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner * nfs4_lock_state(); - status = nfs_ok; - local = find_lockstateowner(owner, clid); - if (local) { - struct nfs4_stateid *stp; - - /* check for any locks held by any stateid - * associated with the (lock) stateowner */ - status = nfserr_locks_held; - list_for_each_entry(stp, &local->so_stateids, - st_perstateowner) { - if (check_for_locks(stp->st_vfs_file, local)) - goto out; + status = nfserr_locks_held; + /* XXX: we're doing a linear search through all the lockowners. + * Yipes! For now we'll just hope clients aren't really using + * release_lockowner much, but eventually we have to fix these + * data structures. */ + INIT_LIST_HEAD(&matches); + for (i = 0; i < LOCK_HASH_SIZE; i++) { + list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { + if (!cmp_owner_str(sop, owner, clid)) + continue; + list_for_each_entry(stp, &sop->so_stateids, + st_perstateowner) { + if (check_for_locks(stp->st_vfs_file, sop)) + goto out; + /* Note: so_perclient unused for lockowners, + * so it's OK to fool with here. */ + list_add(&sop->so_perclient, &matches); + } } - /* no locks held by (lock) stateowner */ - status = nfs_ok; - release_stateowner(local); + } + /* Clients probably won't expect us to return with some (but not all) + * of the lockowner state released; so don't release any until all + * have been checked. */ + status = nfs_ok; + list_for_each_entry(sop, &matches, so_perclient) { + release_stateowner(sop); } out: nfs4_unlock_state(); -- cgit v1.2.2 From cb36d6345752fa24827044c68e15f6708a40d9f6 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:04:23 -0700 Subject: [PATCH] knfsd: nfsd4: remove cb_parsed The cb_parsed field is only used by probe_callback, to determine whether the callback information has been filled in by setclientid. But there is no way that probe_callback() can be called without that having already happened, so that check is superfluous, as is cb_parsed. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4callback.c | 4 +--- fs/nfsd/nfs4state.c | 5 +---- 2 files changed, 2 insertions(+), 7 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 68bb245491..583c0710e4 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -386,9 +386,7 @@ nfsd4_probe_callback(struct nfs4_client *clp) char hostname[32]; int status; - dprintk("NFSD: probe_callback. cb_parsed %d cb_set %d\n", - cb->cb_parsed, atomic_read(&cb->cb_set)); - if (!cb->cb_parsed || atomic_read(&cb->cb_set)) + if (atomic_read(&cb->cb_set)) return; /* Initialize address */ diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 26d00465c2..0b47a97e95 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -377,7 +377,6 @@ create_client(struct xdr_netobj name, char *recdir) { memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); atomic_set(&clp->cl_count, 1); atomic_set(&clp->cl_callback.cb_set, 0); - clp->cl_callback.cb_parsed = 0; INIT_LIST_HEAD(&clp->cl_idhash); INIT_LIST_HEAD(&clp->cl_strhash); INIT_LIST_HEAD(&clp->cl_openowners); @@ -620,14 +619,12 @@ gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) goto out_err; cb->cb_prog = se->se_callback_prog; cb->cb_ident = se->se_callback_ident; - cb->cb_parsed = 1; return; out_err: printk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " "will not receive delegations\n", clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); - cb->cb_parsed = 0; return; } @@ -872,7 +869,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi else { /* XXX: We just turn off callbacks until we can handle * change request correctly. */ - conf->cl_callback.cb_parsed = 0; + atomic_set(&conf->cl_callback.cb_set, 0); gen_confirm(conf); expire_client(unconf); status = nfs_ok; -- cgit v1.2.2 From 190e4fbf96037e5e526ba3210f2bcc2a3b6fe964 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:04:25 -0700 Subject: [PATCH] knfsd: nfsd4: initialize recovery directory NFSv4 clients are required to know what state they have on the server so that they can reclaim it on server reboot. However, it is possible for pathalogical combinations of server reboots and network partitions to leave a client in a state where it cannot know whether it has lost its state on the server. For this reason, rfc3530 requires that we store some information about clients to stable storage. So we maintain a directory /var/lib/nfs/v4recovery with a subdirectory for each client with active state. We leave open the possibility of including files underneath each such subdirectory with information about the client, but for now the subdirectories are empty. We create a client subdirectory whenever a client makes its first non-reclaim open_confirm. We remove a client subdirectory whenever either a) its lease expires, or b) the grace period ends without it reclaiming anything. When handling reclaims, we allow the reclaim if and only if the client doing the reclaim has a subdirectory. This patch adds just the code to scan the recovery directory on nfsd startup. Signed-off-by: Andy Adamson Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4recover.c | 166 ++++++++++++++++++++++++++++++++++++++++++++++++++ fs/nfsd/nfs4state.c | 18 +++++- 2 files changed, 182 insertions(+), 2 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c index 841a305d79..2dc9851a1d 100644 --- a/fs/nfsd/nfs4recover.c +++ b/fs/nfsd/nfs4recover.c @@ -39,6 +39,9 @@ #include #include #include +#include +#include +#include #include #include #include @@ -46,6 +49,27 @@ #define NFSDDBG_FACILITY NFSDDBG_PROC +/* Globals */ +char recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; +static struct nameidata rec_dir; +static int rec_dir_init = 0; + +static void +nfs4_save_user(uid_t *saveuid, gid_t *savegid) +{ + *saveuid = current->fsuid; + *savegid = current->fsgid; + current->fsuid = 0; + current->fsgid = 0; +} + +static void +nfs4_reset_user(uid_t saveuid, gid_t savegid) +{ + current->fsuid = saveuid; + current->fsgid = savegid; +} + static void md5_to_hex(char *out, char *md5) { @@ -95,3 +119,145 @@ out: crypto_free_tfm(tfm); return status; } + +typedef int (recdir_func)(struct dentry *, struct dentry *); + +struct dentry_list { + struct dentry *dentry; + struct list_head list; +}; + +struct dentry_list_arg { + struct list_head dentries; + struct dentry *parent; +}; + +static int +nfsd4_build_dentrylist(void *arg, const char *name, int namlen, + loff_t offset, ino_t ino, unsigned int d_type) +{ + struct dentry_list_arg *dla = arg; + struct list_head *dentries = &dla->dentries; + struct dentry *parent = dla->parent; + struct dentry *dentry; + struct dentry_list *child; + + if (name && isdotent(name, namlen)) + return nfs_ok; + dentry = lookup_one_len(name, parent, namlen); + if (IS_ERR(dentry)) + return PTR_ERR(dentry); + child = kmalloc(sizeof(*child), GFP_KERNEL); + if (child == NULL) + return -ENOMEM; + child->dentry = dentry; + list_add(&child->list, dentries); + return 0; +} + +static int +nfsd4_list_rec_dir(struct dentry *dir, recdir_func *f) +{ + struct file *filp; + struct dentry_list_arg dla = { + .parent = dir, + }; + struct list_head *dentries = &dla.dentries; + struct dentry_list *child; + uid_t uid; + gid_t gid; + int status; + + if (!rec_dir_init) + return 0; + + nfs4_save_user(&uid, &gid); + + filp = dentry_open(dget(dir), mntget(rec_dir.mnt), + O_RDWR); + status = PTR_ERR(filp); + if (IS_ERR(filp)) + goto out; + INIT_LIST_HEAD(dentries); + status = vfs_readdir(filp, nfsd4_build_dentrylist, &dla); + fput(filp); + while (!list_empty(dentries)) { + child = list_entry(dentries->next, struct dentry_list, list); + status = f(dir, child->dentry); + if (status) + goto out; + list_del(&child->list); + dput(child->dentry); + kfree(child); + } +out: + while (!list_empty(dentries)) { + child = list_entry(dentries->next, struct dentry_list, list); + list_del(&child->list); + dput(child->dentry); + kfree(child); + } + nfs4_reset_user(uid, gid); + return status; +} + +static int +load_recdir(struct dentry *parent, struct dentry *child) +{ + if (child->d_name.len != HEXDIR_LEN - 1) { + printk("nfsd4: illegal name %s in recovery directory\n", + child->d_name.name); + /* Keep trying; maybe the others are OK: */ + return nfs_ok; + } + nfs4_client_to_reclaim(child->d_name.name); + return nfs_ok; +} + +int +nfsd4_recdir_load(void) { + int status; + + status = nfsd4_list_rec_dir(rec_dir.dentry, load_recdir); + if (status) + printk("nfsd4: failed loading clients from recovery" + " directory %s\n", rec_dir.dentry->d_name.name); + return status; +} + +/* + * Hold reference to the recovery directory. + */ + +void +nfsd4_init_recdir(char *rec_dirname) +{ + uid_t uid = 0; + gid_t gid = 0; + int status; + + printk("NFSD: Using %s as the NFSv4 state recovery directory\n", + rec_dirname); + + BUG_ON(rec_dir_init); + + nfs4_save_user(&uid, &gid); + + status = path_lookup(rec_dirname, LOOKUP_FOLLOW, &rec_dir); + if (status == -ENOENT) + printk("NFSD: recovery directory %s doesn't exist\n", + rec_dirname); + + if (!status) + rec_dir_init = 1; + nfs4_reset_user(uid, gid); +} + +void +nfsd4_shutdown_recdir(void) +{ + if (!rec_dir_init) + return; + rec_dir_init = 0; + path_release(&rec_dir); +} diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 0b47a97e95..6b9d23c39a 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -71,6 +71,7 @@ static stateid_t onestateid; /* bits all 1 */ static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); static void release_stateid_lockowners(struct nfs4_stateid *open_stp); +extern char recovery_dirname[]; /* Locking: * @@ -3091,8 +3092,8 @@ alloc_reclaim(void) /* * failure => all reset bets are off, nfserr_no_grace... */ -static int -nfs4_client_to_reclaim(char *name) +int +nfs4_client_to_reclaim(const char *name) { unsigned int strhashval; struct nfs4_client_reclaim *crp = NULL; @@ -3202,6 +3203,17 @@ nfs4_state_init(void) reclaim_str_hashtbl_size = 0; } +static void +nfsd4_load_reboot_recovery_data(void) +{ + int status; + + nfsd4_init_recdir(recovery_dirname); + status = nfsd4_recdir_load(); + if (status) + printk("NFSD: Failure reading reboot recovery data\n"); +} + /* initialization to perform when the nfsd service is started: */ static void @@ -3228,6 +3240,7 @@ nfs4_state_start(void) status = nfsd4_init_slabs(); if (status) return status; + nfsd4_load_reboot_recovery_data(); __nfs4_state_start(); nfs4_init = 1; return 0; @@ -3286,6 +3299,7 @@ __nfs4_state_shutdown(void) cancel_delayed_work(&laundromat_work); flush_workqueue(laundry_wq); destroy_workqueue(laundry_wq); + nfsd4_shutdown_recdir(); nfs4_init = 0; } -- cgit v1.2.2 From c7b9a45927e74c81d6562153f7fde9d32da00159 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:04:30 -0700 Subject: [PATCH] knfsd: nfsd4: reboot recovery This patch adds the code to create and remove client subdirectories from the recovery directory, as described in the previous patch comment. Signed-off-by: Andy Adamson Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4recover.c | 169 ++++++++++++++++++++++++++++++++++++++++++++++++++ fs/nfsd/nfs4state.c | 16 +++++ 2 files changed, 185 insertions(+) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c index 2dc9851a1d..2805c5245e 100644 --- a/fs/nfsd/nfs4recover.c +++ b/fs/nfsd/nfs4recover.c @@ -120,6 +120,70 @@ out: return status; } +static int +nfsd4_rec_fsync(struct dentry *dentry) +{ + struct file *filp; + int status = nfs_ok; + + dprintk("NFSD: nfs4_fsync_rec_dir\n"); + filp = dentry_open(dget(dentry), mntget(rec_dir.mnt), O_RDWR); + if (IS_ERR(filp)) { + status = PTR_ERR(filp); + goto out; + } + if (filp->f_op && filp->f_op->fsync) + status = filp->f_op->fsync(filp, filp->f_dentry, 0); + fput(filp); +out: + if (status) + printk("nfsd4: unable to sync recovery directory\n"); + return status; +} + +int +nfsd4_create_clid_dir(struct nfs4_client *clp) +{ + char *dname = clp->cl_recdir; + struct dentry *dentry; + uid_t uid; + gid_t gid; + int status; + + dprintk("NFSD: nfsd4_create_clid_dir for \"%s\"\n", dname); + + if (!rec_dir_init || clp->cl_firststate) + return 0; + + nfs4_save_user(&uid, &gid); + + /* lock the parent */ + down(&rec_dir.dentry->d_inode->i_sem); + + dentry = lookup_one_len(dname, rec_dir.dentry, HEXDIR_LEN-1); + if (IS_ERR(dentry)) { + status = PTR_ERR(dentry); + goto out_unlock; + } + status = -EEXIST; + if (dentry->d_inode) { + dprintk("NFSD: nfsd4_create_clid_dir: DIRECTORY EXISTS\n"); + goto out_put; + } + status = vfs_mkdir(rec_dir.dentry->d_inode, dentry, S_IRWXU); +out_put: + dput(dentry); +out_unlock: + up(&rec_dir.dentry->d_inode->i_sem); + if (status == 0) { + clp->cl_firststate = 1; + status = nfsd4_rec_fsync(rec_dir.dentry); + } + nfs4_reset_user(uid, gid); + dprintk("NFSD: nfsd4_create_clid_dir returns %d\n", status); + return status; +} + typedef int (recdir_func)(struct dentry *, struct dentry *); struct dentry_list { @@ -201,6 +265,111 @@ out: return status; } +static int +nfsd4_remove_clid_file(struct dentry *dir, struct dentry *dentry) +{ + int status; + + if (!S_ISREG(dir->d_inode->i_mode)) { + printk("nfsd4: non-file found in client recovery directory\n"); + return -EINVAL; + } + down(&dir->d_inode->i_sem); + status = vfs_unlink(dir->d_inode, dentry); + up(&dir->d_inode->i_sem); + return status; +} + +static int +nfsd4_clear_clid_dir(struct dentry *dir, struct dentry *dentry) +{ + int status; + + /* For now this directory should already be empty, but we empty it of + * any regular files anyway, just in case the directory was created by + * a kernel from the future.... */ + nfsd4_list_rec_dir(dentry, nfsd4_remove_clid_file); + down(&dir->d_inode->i_sem); + status = vfs_rmdir(dir->d_inode, dentry); + up(&dir->d_inode->i_sem); + return status; +} + +static int +nfsd4_unlink_clid_dir(char *name, int namlen) +{ + struct dentry *dentry; + int status; + + dprintk("NFSD: nfsd4_unlink_clid_dir. name %.*s\n", namlen, name); + + dentry = lookup_one_len(name, rec_dir.dentry, namlen); + if (IS_ERR(dentry)) { + status = PTR_ERR(dentry); + return status; + } + status = -ENOENT; + if (!dentry->d_inode) + goto out; + + status = nfsd4_clear_clid_dir(rec_dir.dentry, dentry); +out: + dput(dentry); + return status; +} + +void +nfsd4_remove_clid_dir(struct nfs4_client *clp) +{ + uid_t uid; + gid_t gid; + int status; + + if (!rec_dir_init || !clp->cl_firststate) + return; + + nfs4_save_user(&uid, &gid); + status = nfsd4_unlink_clid_dir(clp->cl_recdir, HEXDIR_LEN-1); + nfs4_reset_user(uid, gid); + if (status == 0) + status = nfsd4_rec_fsync(rec_dir.dentry); + if (status) + printk("NFSD: Failed to remove expired client state directory" + " %.*s\n", HEXDIR_LEN, clp->cl_recdir); + return; +} + +static int +purge_old(struct dentry *parent, struct dentry *child) +{ + int status; + + if (nfs4_has_reclaimed_state(child->d_name.name)) + return nfs_ok; + + status = nfsd4_clear_clid_dir(parent, child); + if (status) + printk("failed to remove client recovery directory %s\n", + child->d_name.name); + /* Keep trying, success or failure: */ + return nfs_ok; +} + +void +nfsd4_recdir_purge_old(void) { + int status; + + if (!rec_dir_init) + return; + status = nfsd4_list_rec_dir(rec_dir.dentry, purge_old); + if (status == 0) + status = nfsd4_rec_fsync(rec_dir.dentry); + if (status) + printk("nfsd4: failed to purge old clients from recovery" + " directory %s\n", rec_dir.dentry->d_name.name); + return; +} + static int load_recdir(struct dentry *parent, struct dentry *child) { diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 6b9d23c39a..6cca358cd6 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -905,6 +905,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi conf = find_confirmed_client_by_str(unconf->cl_recdir, hash); if (conf) { + nfsd4_remove_clid_dir(conf); expire_client(conf); } move_to_confirmed(unconf); @@ -1691,6 +1692,7 @@ nfs4_set_claim_prev(struct nfsd4_open *open, int *status) *status = nfserr_reclaim_bad; else { open->op_stateowner->so_confirmed = 1; + open->op_stateowner->so_client->cl_firststate = 1; open->op_stateowner->so_seqid--; } } @@ -1903,6 +1905,7 @@ static void end_grace(void) { dprintk("NFSD: end of grace period\n"); + nfsd4_recdir_purge_old(); in_grace = 0; } @@ -1932,6 +1935,7 @@ nfs4_laundromat(void) } dprintk("NFSD: purging unused client (clientid %08x)\n", clp->cl_clientid.cl_id); + nfsd4_remove_clid_dir(clp); expire_client(clp); } INIT_LIST_HEAD(&reaplist); @@ -2320,6 +2324,8 @@ nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfs stp->st_stateid.si_stateownerid, stp->st_stateid.si_fileid, stp->st_stateid.si_generation); + + nfsd4_create_clid_dir(sop->so_client); out: if (oc->oc_stateowner) nfs4_get_stateowner(oc->oc_stateowner); @@ -3089,6 +3095,16 @@ alloc_reclaim(void) return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); } +int +nfs4_has_reclaimed_state(const char *name) +{ + unsigned int strhashval = clientstr_hashval(name); + struct nfs4_client *clp; + + clp = find_confirmed_client_by_str(name, strhashval); + return clp ? 1 : 0; +} + /* * failure => all reset bets are off, nfserr_no_grace... */ -- cgit v1.2.2 From 0964a3d3f1aa96468091924f6b0c391a46dc6d0b Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 23 Jun 2005 22:04:32 -0700 Subject: [PATCH] knfsd: nfsd4 reboot dirname fix Set the recovery directory via /proc/fs/nfsd/nfs4recoverydir. It may be changed any time, but is used only on startup. Signed-off-by: Andy Adamson Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/nfs4recover.c | 1 - fs/nfsd/nfs4state.c | 37 +++++++++++++++++++++++++++++++++++-- fs/nfsd/nfsctl.c | 23 +++++++++++++++++++++++ 3 files changed, 58 insertions(+), 3 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c index 2805c5245e..095f1740f3 100644 --- a/fs/nfsd/nfs4recover.c +++ b/fs/nfsd/nfs4recover.c @@ -50,7 +50,6 @@ #define NFSDDBG_FACILITY NFSDDBG_PROC /* Globals */ -char recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; static struct nameidata rec_dir; static int rec_dir_init = 0; diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 6cca358cd6..89e36526d7 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -48,6 +48,7 @@ #include #include #include +#include #define NFSDDBG_FACILITY NFSDDBG_PROC @@ -71,7 +72,8 @@ static stateid_t onestateid; /* bits all 1 */ static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); static void release_stateid_lockowners(struct nfs4_stateid *open_stp); -extern char recovery_dirname[]; +static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; +static void nfs4_set_recdir(char *recdir); /* Locking: * @@ -3224,8 +3226,10 @@ nfsd4_load_reboot_recovery_data(void) { int status; - nfsd4_init_recdir(recovery_dirname); + nfs4_lock_state(); + nfsd4_init_recdir(user_recovery_dirname); status = nfsd4_recdir_load(); + nfs4_unlock_state(); if (status) printk("NFSD: Failure reading reboot recovery data\n"); } @@ -3329,6 +3333,35 @@ nfs4_state_shutdown(void) nfs4_unlock_state(); } +static void +nfs4_set_recdir(char *recdir) +{ + nfs4_lock_state(); + strcpy(user_recovery_dirname, recdir); + nfs4_unlock_state(); +} + +/* + * Change the NFSv4 recovery directory to recdir. + */ +int +nfs4_reset_recoverydir(char *recdir) +{ + int status; + struct nameidata nd; + + status = path_lookup(recdir, LOOKUP_FOLLOW, &nd); + if (status) + return status; + status = -ENOTDIR; + if (S_ISDIR(nd.dentry->d_inode->i_mode)) { + nfs4_set_recdir(recdir); + status = 0; + } + path_release(&nd); + return status; +} + /* * Called when leasetime is changed. * diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 3da43a3ed3..841c562991 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -51,6 +51,7 @@ enum { NFSD_Fh, NFSD_Threads, NFSD_Leasetime, + NFSD_RecoveryDir, }; /* @@ -66,6 +67,7 @@ static ssize_t write_getfs(struct file *file, char *buf, size_t size); static ssize_t write_filehandle(struct file *file, char *buf, size_t size); static ssize_t write_threads(struct file *file, char *buf, size_t size); static ssize_t write_leasetime(struct file *file, char *buf, size_t size); +static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); static ssize_t (*write_op[])(struct file *, char *, size_t) = { [NFSD_Svc] = write_svc, @@ -78,6 +80,7 @@ static ssize_t (*write_op[])(struct file *, char *, size_t) = { [NFSD_Fh] = write_filehandle, [NFSD_Threads] = write_threads, [NFSD_Leasetime] = write_leasetime, + [NFSD_RecoveryDir] = write_recoverydir, }; static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) @@ -349,6 +352,25 @@ static ssize_t write_leasetime(struct file *file, char *buf, size_t size) return strlen(buf); } +static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) +{ + char *mesg = buf; + char *recdir; + int len, status; + + if (size > PATH_MAX || buf[size-1] != '\n') + return -EINVAL; + buf[size-1] = 0; + + recdir = mesg; + len = qword_get(&mesg, recdir, size); + if (len <= 0) + return -EINVAL; + + status = nfs4_reset_recoverydir(recdir); + return strlen(buf); +} + /*----------------------------------------------------------------------------*/ /* * populating the filesystem. @@ -369,6 +391,7 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent) [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, #ifdef CONFIG_NFSD_V4 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, + [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, #endif /* last one */ {""} }; -- cgit v1.2.2