From 5529680981807b44abf3be30fb6d612ff04f68ff Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Thu, 18 Aug 2005 11:24:09 -0700 Subject: [PATCH] NFS: split nfsi->flags into two fields Certain bits in nfsi->flags can be manipulated with atomic bitops, and some are better manipulated via logical bitmask operations. This patch splits the flags field into two. The next patch introduces atomic bitops for one of the fields. Test plan: Millions of fsx ops on SMP clients. Signed-off-by: Chuck Lever Cc: Trond Myklebust Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/nfs_fs.h | 27 ++++++++++++++++----------- 1 file changed, 16 insertions(+), 11 deletions(-) (limited to 'include/linux') diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index 7d78a783c64a..229a1755842a 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -113,6 +113,7 @@ struct nfs_inode { * Various flags */ unsigned int flags; + unsigned long cache_validity; /* * read_cache_jiffies is when we started read-caching this inode, @@ -188,17 +189,21 @@ struct nfs_inode { }; /* - * Legal inode flag values + * Cache validity bit flags */ -#define NFS_INO_STALE 0x0001 /* possible stale inode */ -#define NFS_INO_ADVISE_RDPLUS 0x0002 /* advise readdirplus */ -#define NFS_INO_REVALIDATING 0x0004 /* revalidating attrs */ -#define NFS_INO_INVALID_ATTR 0x0008 /* cached attrs are invalid */ -#define NFS_INO_INVALID_DATA 0x0010 /* cached data is invalid */ -#define NFS_INO_INVALID_ATIME 0x0020 /* cached atime is invalid */ -#define NFS_INO_INVALID_ACCESS 0x0040 /* cached access cred invalid */ -#define NFS_INO_INVALID_ACL 0x0080 /* cached acls are invalid */ -#define NFS_INO_REVAL_PAGECACHE 0x1000 /* must revalidate pagecache */ +#define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */ +#define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */ +#define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */ +#define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */ +#define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */ +#define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */ + +/* + * Legal values of flags field + */ +#define NFS_INO_REVALIDATING 0x0001 /* revalidating attrs */ +#define NFS_INO_ADVISE_RDPLUS 0x0002 /* advise readdirplus */ +#define NFS_INO_STALE 0x0004 /* possible stale inode */ static inline struct nfs_inode *NFS_I(struct inode *inode) { @@ -237,7 +242,7 @@ static inline int nfs_caches_unstable(struct inode *inode) static inline void NFS_CACHEINV(struct inode *inode) { if (!nfs_caches_unstable(inode)) - NFS_FLAGS(inode) |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS; + NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS; } static inline int nfs_server_capable(struct inode *inode, int cap) -- cgit v1.2.3 From 412d582ec1dd59aab2353f8cb7e74f2c79cd20b9 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Thu, 18 Aug 2005 11:24:11 -0700 Subject: [PATCH] NFS: use atomic bitops to manipulate flags in nfsi->flags Introduce atomic bitops to manipulate the bits in the nfs_inode structure's "flags" field. Using bitops means we can use a generic wait_on_bit call instead of an ad hoc locking scheme in fs/nfs/inode.c, so we can remove the "nfs_i_wait" field from nfs_inode at the same time. The other new flags field will continue to use bitmask and logic AND and OR. This permits several flags to be set at the same time efficiently. The following patch adds a spin lock to protect these flags, and this spin lock will later cover other fields in the nfs_inode structure, amortizing the cost of using this type of serialization. Test plan: Millions of fsx ops on SMP clients. Signed-off-by: Chuck Lever Cc: Trond Myklebust Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfs/dir.c | 4 +-- fs/nfs/inode.c | 69 +++++++++++++++++++++++++++++++------------------- include/linux/nfs_fs.h | 19 ++++++-------- 3 files changed, 53 insertions(+), 39 deletions(-) (limited to 'include/linux') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 5732e13cd0da..27cf5577f239 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -182,7 +182,7 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page *page) /* We requested READDIRPLUS, but the server doesn't grok it */ if (error == -ENOTSUPP && desc->plus) { NFS_SERVER(inode)->caps &= ~NFS_CAP_READDIRPLUS; - NFS_FLAGS(inode) &= ~NFS_INO_ADVISE_RDPLUS; + clear_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); desc->plus = 0; goto again; } @@ -545,7 +545,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) break; } if (res == -ETOOSMALL && desc->plus) { - NFS_FLAGS(inode) &= ~NFS_INO_ADVISE_RDPLUS; + clear_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); nfs_zap_caches(inode); desc->plus = 0; desc->entry->eof = 0; diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 622184553516..ee27578277f3 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -739,7 +739,7 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) inode->i_fop = &nfs_dir_operations; if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) && fattr->size <= NFS_LIMIT_READDIRPLUS) - NFS_FLAGS(inode) |= NFS_INO_ADVISE_RDPLUS; + set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); } else if (S_ISLNK(inode->i_mode)) inode->i_op = &nfs_symlink_inode_operations; else @@ -849,26 +849,43 @@ void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) } } +static int nfs_wait_schedule(void *word) +{ + if (signal_pending(current)) + return -ERESTARTSYS; + schedule(); + return 0; +} + /* * Wait for the inode to get unlocked. - * (Used for NFS_INO_LOCKED and NFS_INO_REVALIDATING). */ -static int -nfs_wait_on_inode(struct inode *inode, int flag) +static int nfs_wait_on_inode(struct inode *inode) { struct rpc_clnt *clnt = NFS_CLIENT(inode); struct nfs_inode *nfsi = NFS_I(inode); - + sigset_t oldmask; int error; - if (!(NFS_FLAGS(inode) & flag)) - return 0; + atomic_inc(&inode->i_count); - error = nfs_wait_event(clnt, nfsi->nfs_i_wait, - !(NFS_FLAGS(inode) & flag)); + rpc_clnt_sigmask(clnt, &oldmask); + error = wait_on_bit_lock(&nfsi->flags, NFS_INO_REVALIDATING, + nfs_wait_schedule, TASK_INTERRUPTIBLE); + rpc_clnt_sigunmask(clnt, &oldmask); iput(inode); + return error; } +static void nfs_wake_up_inode(struct inode *inode) +{ + struct nfs_inode *nfsi = NFS_I(inode); + + clear_bit(NFS_INO_REVALIDATING, &nfsi->flags); + smp_mb__after_clear_bit(); + wake_up_bit(&nfsi->flags, NFS_INO_REVALIDATING); +} + int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) { struct inode *inode = dentry->d_inode; @@ -1029,18 +1046,19 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) if (NFS_STALE(inode)) goto out_nowait; - while (NFS_REVALIDATING(inode)) { - status = nfs_wait_on_inode(inode, NFS_INO_REVALIDATING); - if (status < 0) - goto out_nowait; - if (NFS_ATTRTIMEO(inode) == 0) - continue; - if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ATIME)) - continue; - status = NFS_STALE(inode) ? -ESTALE : 0; - goto out_nowait; + status = nfs_wait_on_inode(inode); + if (status < 0) + goto out; + if (NFS_STALE(inode)) { + status = -ESTALE; + /* Do we trust the cached ESTALE? */ + if (NFS_ATTRTIMEO(inode) != 0) { + if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ATIME)) { + /* no */ + } else + goto out; + } } - NFS_FLAGS(inode) |= NFS_INO_REVALIDATING; /* Protect against RPC races by saving the change attribute */ verifier = nfs_save_change_attribute(inode); @@ -1052,7 +1070,7 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) if (status == -ESTALE) { nfs_zap_caches(inode); if (!S_ISDIR(inode->i_mode)) - NFS_FLAGS(inode) |= NFS_INO_STALE; + set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); } goto out; } @@ -1083,9 +1101,9 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) inode->i_sb->s_id, (long long)NFS_FILEID(inode)); -out: - NFS_FLAGS(inode) &= ~NFS_INO_REVALIDATING; - wake_up(&nfsi->nfs_i_wait); + out: + nfs_wake_up_inode(inode); + out_nowait: unlock_kernel(); return status; @@ -1404,7 +1422,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr, unsign */ nfs_invalidate_inode(inode); out_err: - NFS_FLAGS(inode) |= NFS_INO_STALE; + set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); return -ESTALE; } @@ -1996,7 +2014,6 @@ static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) nfsi->ndirty = 0; nfsi->ncommit = 0; nfsi->npages = 0; - init_waitqueue_head(&nfsi->nfs_i_wait); nfs4_init_once(nfsi); } } diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index 229a1755842a..deef9567788a 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -112,8 +112,8 @@ struct nfs_inode { /* * Various flags */ - unsigned int flags; - unsigned long cache_validity; + unsigned long flags; /* atomic bit ops */ + unsigned long cache_validity; /* bit mask */ /* * read_cache_jiffies is when we started read-caching this inode, @@ -175,8 +175,6 @@ struct nfs_inode { /* Open contexts for shared mmap writes */ struct list_head open_files; - wait_queue_head_t nfs_i_wait; - #ifdef CONFIG_NFS_V4 struct nfs4_cached_acl *nfs4_acl; /* NFSv4 state */ @@ -199,11 +197,11 @@ struct nfs_inode { #define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */ /* - * Legal values of flags field + * Bit offsets in flags field */ -#define NFS_INO_REVALIDATING 0x0001 /* revalidating attrs */ -#define NFS_INO_ADVISE_RDPLUS 0x0002 /* advise readdirplus */ -#define NFS_INO_STALE 0x0004 /* possible stale inode */ +#define NFS_INO_REVALIDATING (0) /* revalidating attrs */ +#define NFS_INO_ADVISE_RDPLUS (1) /* advise readdirplus */ +#define NFS_INO_STALE (2) /* possible stale inode */ static inline struct nfs_inode *NFS_I(struct inode *inode) { @@ -229,8 +227,7 @@ static inline struct nfs_inode *NFS_I(struct inode *inode) #define NFS_ATTRTIMEO_UPDATE(inode) (NFS_I(inode)->attrtimeo_timestamp) #define NFS_FLAGS(inode) (NFS_I(inode)->flags) -#define NFS_REVALIDATING(inode) (NFS_FLAGS(inode) & NFS_INO_REVALIDATING) -#define NFS_STALE(inode) (NFS_FLAGS(inode) & NFS_INO_STALE) +#define NFS_STALE(inode) (test_bit(NFS_INO_STALE, &NFS_FLAGS(inode))) #define NFS_FILEID(inode) (NFS_I(inode)->fileid) @@ -252,7 +249,7 @@ static inline int nfs_server_capable(struct inode *inode, int cap) static inline int NFS_USE_READDIRPLUS(struct inode *inode) { - return NFS_FLAGS(inode) & NFS_INO_ADVISE_RDPLUS; + return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); } /** -- cgit v1.2.3 From dc59250c6ebed099a9bc0a11298e2281dd896657 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Thu, 18 Aug 2005 11:24:12 -0700 Subject: [PATCH] NFS: Introduce the use of inode->i_lock to protect fields in nfsi Down the road we want to eliminate the use of the global kernel lock entirely from the NFS client. To do this, we need to protect the fields in the nfs_inode structure adequately. Start by serializing updates to the "cache_validity" field. Note this change addresses an SMP hang found by njw@osdl.org, where processes deadlock because nfs_end_data_update and nfs_revalidate_mapping update the "cache_validity" field without proper serialization. Test plan: Millions of fsx ops on SMP clients. Run Nick Wilson's breaknfs program on large SMP clients. Signed-off-by: Chuck Lever Cc: Trond Myklebust Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfs/dir.c | 7 +++++++ fs/nfs/inode.c | 34 +++++++++++++++++++++++++++++++--- fs/nfs/nfs3acl.c | 2 ++ fs/nfs/read.c | 4 ++++ include/linux/nfs_fs.h | 5 ++++- 5 files changed, 48 insertions(+), 4 deletions(-) (limited to 'include/linux') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 27cf5577f239..147cbf9261ce 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -189,7 +189,9 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page *page) goto error; } SetPageUptodate(page); + spin_lock(&inode->i_lock); NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; + spin_unlock(&inode->i_lock); /* Ensure consistent page alignment of the data. * Note: assumes we have exclusive access to this mapping either * through inode->i_sem or some other mechanism. @@ -462,7 +464,9 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent, page, NFS_SERVER(inode)->dtsize, desc->plus); + spin_lock(&inode->i_lock); NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; + spin_unlock(&inode->i_lock); desc->page = page; desc->ptr = kmap(page); /* matching kunmap in nfs_do_filldir */ if (desc->error >= 0) { @@ -1596,7 +1600,10 @@ void nfs_access_add_cache(struct inode *inode, struct nfs_access_entry *set) put_rpccred(cache->cred); cache->cred = get_rpccred(set->cred); } + /* FIXME: replace current access_cache BKL reliance with inode->i_lock */ + spin_lock(&inode->i_lock); nfsi->cache_validity &= ~NFS_INO_INVALID_ACCESS; + spin_unlock(&inode->i_lock); cache->jiffies = set->jiffies; cache->mask = set->mask; } diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index ee27578277f3..541b418327c8 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -615,6 +615,8 @@ nfs_zap_caches(struct inode *inode) struct nfs_inode *nfsi = NFS_I(inode); int mode = inode->i_mode; + spin_lock(&inode->i_lock); + NFS_ATTRTIMEO(inode) = NFS_MINATTRTIMEO(inode); NFS_ATTRTIMEO_UPDATE(inode) = jiffies; @@ -623,6 +625,8 @@ nfs_zap_caches(struct inode *inode) nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; else nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; + + spin_unlock(&inode->i_lock); } static void nfs_zap_acl_cache(struct inode *inode) @@ -632,7 +636,9 @@ static void nfs_zap_acl_cache(struct inode *inode) clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; if (clear_acl_cache != NULL) clear_acl_cache(inode); + spin_lock(&inode->i_lock); NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; + spin_unlock(&inode->i_lock); } /* @@ -841,7 +847,9 @@ void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) inode->i_uid = attr->ia_uid; if ((attr->ia_valid & ATTR_GID) != 0) inode->i_gid = attr->ia_gid; + spin_lock(&inode->i_lock); NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; + spin_unlock(&inode->i_lock); } if ((attr->ia_valid & ATTR_SIZE) != 0) { inode->i_size = attr->ia_size; @@ -1082,6 +1090,7 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) (long long)NFS_FILEID(inode), status); goto out; } + spin_lock(&inode->i_lock); cache_validity = nfsi->cache_validity; nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE; @@ -1091,6 +1100,7 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) */ if (verifier == nfsi->cache_change_attribute) nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME); + spin_unlock(&inode->i_lock); nfs_revalidate_mapping(inode, inode->i_mapping); @@ -1149,12 +1159,16 @@ void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) nfs_wb_all(inode); } invalidate_inode_pages2(mapping); + + spin_lock(&inode->i_lock); nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; if (S_ISDIR(inode->i_mode)) { memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); /* This ensures we revalidate child dentries */ nfsi->cache_change_attribute++; } + spin_unlock(&inode->i_lock); + dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", inode->i_sb->s_id, (long long)NFS_FILEID(inode)); @@ -1184,10 +1198,12 @@ void nfs_end_data_update(struct inode *inode) if (!nfs_have_delegation(inode, FMODE_READ)) { /* Mark the attribute cache for revalidation */ + spin_lock(&inode->i_lock); nfsi->cache_validity |= NFS_INO_INVALID_ATTR; /* Directories and symlinks: invalidate page cache too */ if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) nfsi->cache_validity |= NFS_INO_INVALID_DATA; + spin_unlock(&inode->i_lock); } nfsi->cache_change_attribute ++; atomic_dec(&nfsi->data_updates); @@ -1212,6 +1228,8 @@ int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) if (nfs_have_delegation(inode, FMODE_READ)) return 0; + spin_lock(&inode->i_lock); + /* Are we in the process of updating data on the server? */ data_unstable = nfs_caches_unstable(inode); @@ -1226,13 +1244,17 @@ int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) } } - if ((fattr->valid & NFS_ATTR_FATTR) == 0) + if ((fattr->valid & NFS_ATTR_FATTR) == 0) { + spin_unlock(&inode->i_lock); return 0; + } /* Has the inode gone and changed behind our back? */ if (nfsi->fileid != fattr->fileid - || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) + || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { + spin_unlock(&inode->i_lock); return -EIO; + } cur_size = i_size_read(inode); new_isize = nfs_size_to_loff_t(fattr->size); @@ -1271,6 +1293,7 @@ int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) nfsi->cache_validity |= NFS_INO_INVALID_ATIME; nfsi->read_cache_jiffies = fattr->timestamp; + spin_unlock(&inode->i_lock); return 0; } @@ -1309,11 +1332,15 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr, unsign goto out_err; } + spin_lock(&inode->i_lock); + /* * Make sure the inode's type hasn't changed. */ - if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) + if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { + spin_unlock(&inode->i_lock); goto out_changed; + } /* * Update the read time so we don't revalidate too often. @@ -1406,6 +1433,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr, unsign if (!nfs_have_delegation(inode, FMODE_READ)) nfsi->cache_validity |= invalid; + spin_unlock(&inode->i_lock); return 0; out_changed: /* diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c index a020e650ffc2..6a5bbc0ae941 100644 --- a/fs/nfs/nfs3acl.c +++ b/fs/nfs/nfs3acl.c @@ -308,7 +308,9 @@ static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl, nfs_begin_data_update(inode); status = rpc_call(server->client_acl, ACLPROC3_SETACL, &args, &fattr, 0); + spin_lock(&inode->i_lock); NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS; + spin_unlock(&inode->i_lock); nfs_end_data_update(inode); dprintk("NFS reply setacl: %d\n", status); diff --git a/fs/nfs/read.c b/fs/nfs/read.c index 90df0500ca1b..6ceb1d471f20 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -140,7 +140,9 @@ static int nfs_readpage_sync(struct nfs_open_context *ctx, struct inode *inode, if (rdata->res.eof != 0 || result == 0) break; } while (count); + spin_lock(&inode->i_lock); NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; + spin_unlock(&inode->i_lock); if (count) memclear_highpage_flush(page, rdata->args.pgbase, count); @@ -473,7 +475,9 @@ void nfs_readpage_result(struct rpc_task *task) } task->tk_status = -EIO; } + spin_lock(&data->inode->i_lock); NFS_I(data->inode)->cache_validity |= NFS_INO_INVALID_ATIME; + spin_unlock(&data->inode->i_lock); data->complete(data, status); } diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index deef9567788a..9a6047ff1b25 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -238,8 +238,11 @@ static inline int nfs_caches_unstable(struct inode *inode) static inline void NFS_CACHEINV(struct inode *inode) { - if (!nfs_caches_unstable(inode)) + if (!nfs_caches_unstable(inode)) { + spin_lock(&inode->i_lock); NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS; + spin_unlock(&inode->i_lock); + } } static inline int nfs_server_capable(struct inode *inode, int cap) -- cgit v1.2.3 From b07e5eccaf512ae3209beae5cd2e3a27c92c300b Mon Sep 17 00:00:00 2001 From: Grant Coady Date: Thu, 18 Aug 2005 22:19:55 +0200 Subject: [PATCH] ide: fix PCI_DEVIEC_ID_APPLE_UNI_N_ATA spelling Signed-off-by: Grant Coady Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ppc/pmac.c | 2 +- include/linux/pci_ids.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c index be0fcc8f4b15..ea65b070a367 100644 --- a/drivers/ide/ppc/pmac.c +++ b/drivers/ide/ppc/pmac.c @@ -1664,7 +1664,7 @@ static struct macio_driver pmac_ide_macio_driver = }; static struct pci_device_id pmac_ide_pci_match[] = { - { PCI_VENDOR_ID_APPLE, PCI_DEVIEC_ID_APPLE_UNI_N_ATA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, + { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_ATA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_IPID_ATA100, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_K2_ATA100, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_SH_ATA, diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index 51e61e96051c..953b4dc819ae 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -881,7 +881,7 @@ #define PCI_DEVICE_ID_APPLE_UNI_N_PCI15 0x002e #define PCI_DEVICE_ID_APPLE_UNI_N_FW2 0x0030 #define PCI_DEVICE_ID_APPLE_UNI_N_GMAC2 0x0032 -#define PCI_DEVIEC_ID_APPLE_UNI_N_ATA 0x0033 +#define PCI_DEVICE_ID_APPLE_UNI_N_ATA 0x0033 #define PCI_DEVICE_ID_APPLE_UNI_N_AGP2 0x0034 #define PCI_DEVICE_ID_APPLE_IPID_ATA100 0x003b #define PCI_DEVICE_ID_APPLE_KEYLARGO_I 0x003e -- cgit v1.2.3 From 2f09a7f4af131bf23c013ead89373deba1c7593c Mon Sep 17 00:00:00 2001 From: Matt Gillette Date: Thu, 18 Aug 2005 22:27:07 +0200 Subject: [PATCH] ide: add support for Netcell Revolution to pci-ide generic driver Adds support for Netcell Revolution to pci-ide generic driver by including it in the list of devices matched. Includes the Revolution in the list of simplex devices forced into DMA mode. Signed-off-by: Matt Gillette Cc: Bartlomiej Zolnierkiewicz Cc: Jeff Garzik Signed-off-by: Andrew Morton Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/pci/generic.c | 7 +++++++ drivers/ide/setup-pci.c | 1 + include/linux/pci_ids.h | 3 +++ 3 files changed, 11 insertions(+) (limited to 'include/linux') diff --git a/drivers/ide/pci/generic.c b/drivers/ide/pci/generic.c index da46577380f3..6e3ab0c38c4d 100644 --- a/drivers/ide/pci/generic.c +++ b/drivers/ide/pci/generic.c @@ -173,6 +173,12 @@ static ide_pci_device_t generic_chipsets[] __devinitdata = { .channels = 2, .autodma = NOAUTODMA, .bootable = ON_BOARD, + },{ /* 14 */ + .name = "Revolution", + .init_hwif = init_hwif_generic, + .channels = 2, + .autodma = AUTODMA, + .bootable = OFF_BOARD, } }; @@ -231,6 +237,7 @@ static struct pci_device_id generic_pci_tbl[] = { { PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 11}, { PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 12}, { PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 13}, + { PCI_VENDOR_ID_NETCELL,PCI_DEVICE_ID_REVOLUTION, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 14}, /* Must come last. If you add entries adjust this table appropriately and the init_one code */ { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 0}, { 0, }, diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c index 77da827b2898..18ed7765417c 100644 --- a/drivers/ide/setup-pci.c +++ b/drivers/ide/setup-pci.c @@ -229,6 +229,7 @@ second_chance_to_dma: case PCI_DEVICE_ID_AMD_VIPER_7409: case PCI_DEVICE_ID_CMD_643: case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE: + case PCI_DEVICE_ID_REVOLUTION: simplex_stat = hwif->INB(dma_base + 2); hwif->OUTB((simplex_stat&0x60),(dma_base + 2)); simplex_stat = hwif->INB(dma_base + 2); diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index 953b4dc819ae..163036867ac7 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -2184,6 +2184,9 @@ #define PCI_VENDOR_ID_SIBYTE 0x166d #define PCI_DEVICE_ID_BCM1250_HT 0x0002 +#define PCI_VENDOR_ID_NETCELL 0x169c +#define PCI_DEVICE_ID_REVOLUTION 0x0044 + #define PCI_VENDOR_ID_LINKSYS 0x1737 #define PCI_DEVICE_ID_LINKSYS_EG1032 0x1032 #define PCI_DEVICE_ID_LINKSYS_EG1064 0x1064 -- cgit v1.2.3 From 84f57fbc724e3b56dc87c37dddac89f82cf75ef6 Mon Sep 17 00:00:00 2001 From: Narendra Sankar Date: Thu, 18 Aug 2005 22:30:35 +0200 Subject: [PATCH] serverworks: add support for new southbridge IDE BCM5785 (HT1000) is a Opteron Southbridge from Serverworks/Broadcom that incorporates a single channel ATA100 IDE controller that is functionally identical to the Serverworks CSB6 IDE controller. This patch adds support for the new PCI device ID and also the support for this controller. Signed-off-by: Narendra Sankar Acked-by: Jeff Garzik Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/pci/serverworks.c | 23 +++++++++++++++++++++++ include/linux/pci_ids.h | 1 + 2 files changed, 24 insertions(+) (limited to 'include/linux') diff --git a/drivers/ide/pci/serverworks.c b/drivers/ide/pci/serverworks.c index c6f5fa4b4ca6..ff2e217a8c84 100644 --- a/drivers/ide/pci/serverworks.c +++ b/drivers/ide/pci/serverworks.c @@ -21,6 +21,9 @@ * * CSB6: `Champion South Bridge' IDE Interface (optional: third channel) * + * HT1000: AKA BCM5785 - Hypertransport Southbridge for Opteron systems. IDE + * controller same as the CSB6. Single channel ATA100 only. + * * Documentation: * Available under NDA only. Errata info very hard to get. * @@ -71,6 +74,8 @@ static u8 svwks_ratemask (ide_drive_t *drive) if (!svwks_revision) pci_read_config_byte(dev, PCI_REVISION_ID, &svwks_revision); + if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE) + return 2; if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) { u32 reg = 0; if (isa_dev) @@ -109,6 +114,7 @@ static u8 svwks_csb_check (struct pci_dev *dev) case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE: case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE: case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2: + case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE: return 1; default: break; @@ -438,6 +444,13 @@ static unsigned int __devinit init_chipset_svwks (struct pci_dev *dev, const cha btr |= (svwks_revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2; pci_write_config_byte(dev, 0x5A, btr); } + /* Setup HT1000 SouthBridge Controller - Single Channel Only */ + else if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE) { + pci_read_config_byte(dev, 0x5A, &btr); + btr &= ~0x40; + btr |= 0x3; + pci_write_config_byte(dev, 0x5A, btr); + } return (dev->irq) ? dev->irq : 0; } @@ -629,6 +642,15 @@ static ide_pci_device_t serverworks_chipsets[] __devinitdata = { .channels = 1, /* 2 */ .autodma = AUTODMA, .bootable = ON_BOARD, + },{ /* 4 */ + .name = "SvrWks HT1000", + .init_setup = init_setup_svwks, + .init_chipset = init_chipset_svwks, + .init_hwif = init_hwif_svwks, + .init_dma = init_dma_svwks, + .channels = 1, /* 2 */ + .autodma = AUTODMA, + .bootable = ON_BOARD, } }; @@ -653,6 +675,7 @@ static struct pci_device_id svwks_pci_tbl[] = { { PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1}, { PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2}, { PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3}, + { PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4}, { 0, }, }; MODULE_DEVICE_TABLE(pci, svwks_pci_tbl); diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index 163036867ac7..927ed487630d 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -1580,6 +1580,7 @@ #define PCI_DEVICE_ID_SERVERWORKS_OSB4IDE 0x0211 #define PCI_DEVICE_ID_SERVERWORKS_CSB5IDE 0x0212 #define PCI_DEVICE_ID_SERVERWORKS_CSB6IDE 0x0213 +#define PCI_DEVICE_ID_SERVERWORKS_HT1000IDE 0x0214 #define PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2 0x0217 #define PCI_DEVICE_ID_SERVERWORKS_OSB4USB 0x0220 #define PCI_DEVICE_ID_SERVERWORKS_CSB5USB PCI_DEVICE_ID_SERVERWORKS_OSB4USB -- cgit v1.2.3 From cc314eef0128a807e50fa03baf2d0abc0647952c Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Fri, 19 Aug 2005 18:02:56 -0700 Subject: Fix nasty ncpfs symlink handling bug. This bug could cause oopses and page state corruption, because ncpfs used the generic page-cache symlink handlign functions. But those functions only work if the page cache is guaranteed to be "stable", ie a page that was installed when the symlink walk was started has to still be installed in the page cache at the end of the walk. We could have fixed ncpfs to not use the generic helper routines, but it is in many ways much cleaner to instead improve on the symlink walking helper routines so that they don't require that absolute stability. We do this by allowing "follow_link()" to return a error-pointer as a cookie, which is fed back to the cleanup "put_link()" routine. This also simplifies NFS symlink handling. Signed-off-by: Linus Torvalds --- fs/autofs/symlink.c | 5 +++-- fs/cifs/cifsfs.h | 4 ++-- fs/cifs/link.c | 6 +++--- fs/ext2/symlink.c | 4 ++-- fs/ext3/symlink.c | 4 ++-- fs/namei.c | 40 +++++++++++++++++++++------------------- fs/nfs/symlink.c | 37 ++++++++----------------------------- fs/sysfs/symlink.c | 6 +++--- include/linux/fs.h | 8 ++++---- mm/shmem.c | 17 ++++++----------- 10 files changed, 54 insertions(+), 77 deletions(-) (limited to 'include/linux') diff --git a/fs/autofs/symlink.c b/fs/autofs/symlink.c index f028396f1383..52e8772b066e 100644 --- a/fs/autofs/symlink.c +++ b/fs/autofs/symlink.c @@ -12,11 +12,12 @@ #include "autofs_i.h" -static int autofs_follow_link(struct dentry *dentry, struct nameidata *nd) +/* Nothing to release.. */ +static void *autofs_follow_link(struct dentry *dentry, struct nameidata *nd) { char *s=((struct autofs_symlink *)dentry->d_inode->u.generic_ip)->data; nd_set_link(nd, s); - return 0; + return NULL; } struct inode_operations autofs_symlink_inode_operations = { diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h index 78af5850c558..1fd21f66f243 100644 --- a/fs/cifs/cifsfs.h +++ b/fs/cifs/cifsfs.h @@ -83,8 +83,8 @@ extern int cifs_dir_notify(struct file *, unsigned long arg); extern struct dentry_operations cifs_dentry_ops; /* Functions related to symlinks */ -extern int cifs_follow_link(struct dentry *direntry, struct nameidata *nd); -extern void cifs_put_link(struct dentry *direntry, struct nameidata *nd); +extern void *cifs_follow_link(struct dentry *direntry, struct nameidata *nd); +extern void cifs_put_link(struct dentry *direntry, struct nameidata *nd, void *); extern int cifs_readlink(struct dentry *direntry, char __user *buffer, int buflen); extern int cifs_symlink(struct inode *inode, struct dentry *direntry, diff --git a/fs/cifs/link.c b/fs/cifs/link.c index bde0fabfece0..ab925ef4f863 100644 --- a/fs/cifs/link.c +++ b/fs/cifs/link.c @@ -92,7 +92,7 @@ cifs_hl_exit: return rc; } -int +void * cifs_follow_link(struct dentry *direntry, struct nameidata *nd) { struct inode *inode = direntry->d_inode; @@ -148,7 +148,7 @@ out: out_no_free: FreeXid(xid); nd_set_link(nd, target_path); - return 0; + return NULL; /* No cookie */ } int @@ -330,7 +330,7 @@ cifs_readlink(struct dentry *direntry, char __user *pBuffer, int buflen) return rc; } -void cifs_put_link(struct dentry *direntry, struct nameidata *nd) +void cifs_put_link(struct dentry *direntry, struct nameidata *nd, void *cookie) { char *p = nd_get_link(nd); if (!IS_ERR(p)) diff --git a/fs/ext2/symlink.c b/fs/ext2/symlink.c index 9f7bac01d557..1e67d87cfa91 100644 --- a/fs/ext2/symlink.c +++ b/fs/ext2/symlink.c @@ -21,11 +21,11 @@ #include "xattr.h" #include -static int ext2_follow_link(struct dentry *dentry, struct nameidata *nd) +static void *ext2_follow_link(struct dentry *dentry, struct nameidata *nd) { struct ext2_inode_info *ei = EXT2_I(dentry->d_inode); nd_set_link(nd, (char *)ei->i_data); - return 0; + return NULL; } struct inode_operations ext2_symlink_inode_operations = { diff --git a/fs/ext3/symlink.c b/fs/ext3/symlink.c index 8c3e72818fb0..4f79122cde67 100644 --- a/fs/ext3/symlink.c +++ b/fs/ext3/symlink.c @@ -23,11 +23,11 @@ #include #include "xattr.h" -static int ext3_follow_link(struct dentry *dentry, struct nameidata *nd) +static void * ext3_follow_link(struct dentry *dentry, struct nameidata *nd) { struct ext3_inode_info *ei = EXT3_I(dentry->d_inode); nd_set_link(nd, (char*)ei->i_data); - return 0; + return NULL; } struct inode_operations ext3_symlink_inode_operations = { diff --git a/fs/namei.c b/fs/namei.c index b85f158aef0c..6ec1f0fefc5b 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -501,6 +501,7 @@ struct path { static inline int __do_follow_link(struct path *path, struct nameidata *nd) { int error; + void *cookie; struct dentry *dentry = path->dentry; touch_atime(path->mnt, dentry); @@ -508,13 +509,15 @@ static inline int __do_follow_link(struct path *path, struct nameidata *nd) if (path->mnt == nd->mnt) mntget(path->mnt); - error = dentry->d_inode->i_op->follow_link(dentry, nd); - if (!error) { + cookie = dentry->d_inode->i_op->follow_link(dentry, nd); + error = PTR_ERR(cookie); + if (!IS_ERR(cookie)) { char *s = nd_get_link(nd); + error = 0; if (s) error = __vfs_follow_link(nd, s); if (dentry->d_inode->i_op->put_link) - dentry->d_inode->i_op->put_link(dentry, nd); + dentry->d_inode->i_op->put_link(dentry, nd, cookie); } dput(dentry); mntput(path->mnt); @@ -2344,15 +2347,17 @@ out: int generic_readlink(struct dentry *dentry, char __user *buffer, int buflen) { struct nameidata nd; - int res; + void *cookie; + nd.depth = 0; - res = dentry->d_inode->i_op->follow_link(dentry, &nd); - if (!res) { - res = vfs_readlink(dentry, buffer, buflen, nd_get_link(&nd)); + cookie = dentry->d_inode->i_op->follow_link(dentry, &nd); + if (!IS_ERR(cookie)) { + int res = vfs_readlink(dentry, buffer, buflen, nd_get_link(&nd)); if (dentry->d_inode->i_op->put_link) - dentry->d_inode->i_op->put_link(dentry, &nd); + dentry->d_inode->i_op->put_link(dentry, &nd, cookie); + cookie = ERR_PTR(res); } - return res; + return PTR_ERR(cookie); } int vfs_follow_link(struct nameidata *nd, const char *link) @@ -2395,23 +2400,20 @@ int page_readlink(struct dentry *dentry, char __user *buffer, int buflen) return res; } -int page_follow_link_light(struct dentry *dentry, struct nameidata *nd) +void *page_follow_link_light(struct dentry *dentry, struct nameidata *nd) { - struct page *page; + struct page *page = NULL; nd_set_link(nd, page_getlink(dentry, &page)); - return 0; + return page; } -void page_put_link(struct dentry *dentry, struct nameidata *nd) +void page_put_link(struct dentry *dentry, struct nameidata *nd, void *cookie) { - if (!IS_ERR(nd_get_link(nd))) { - struct page *page; - page = find_get_page(dentry->d_inode->i_mapping, 0); - if (!page) - BUG(); + struct page *page = cookie; + + if (page) { kunmap(page); page_cache_release(page); - page_cache_release(page); } } diff --git a/fs/nfs/symlink.c b/fs/nfs/symlink.c index 35f106599144..18dc95b0b646 100644 --- a/fs/nfs/symlink.c +++ b/fs/nfs/symlink.c @@ -27,26 +27,14 @@ /* Symlink caching in the page cache is even more simplistic * and straight-forward than readdir caching. - * - * At the beginning of the page we store pointer to struct page in question, - * simplifying nfs_put_link() (if inode got invalidated we can't find the page - * to be freed via pagecache lookup). - * The NUL-terminated string follows immediately thereafter. */ -struct nfs_symlink { - struct page *page; - char body[0]; -}; - static int nfs_symlink_filler(struct inode *inode, struct page *page) { - const unsigned int pgbase = offsetof(struct nfs_symlink, body); - const unsigned int pglen = PAGE_SIZE - pgbase; int error; lock_kernel(); - error = NFS_PROTO(inode)->readlink(inode, page, pgbase, pglen); + error = NFS_PROTO(inode)->readlink(inode, page, 0, PAGE_SIZE); unlock_kernel(); if (error < 0) goto error; @@ -60,11 +48,10 @@ error: return -EIO; } -static int nfs_follow_link(struct dentry *dentry, struct nameidata *nd) +static void *nfs_follow_link(struct dentry *dentry, struct nameidata *nd) { struct inode *inode = dentry->d_inode; struct page *page; - struct nfs_symlink *p; void *err = ERR_PTR(nfs_revalidate_inode(NFS_SERVER(inode), inode)); if (err) goto read_failed; @@ -78,28 +65,20 @@ static int nfs_follow_link(struct dentry *dentry, struct nameidata *nd) err = ERR_PTR(-EIO); goto getlink_read_error; } - p = kmap(page); - p->page = page; - nd_set_link(nd, p->body); - return 0; + nd_set_link(nd, kmap(page)); + return page; getlink_read_error: page_cache_release(page); read_failed: nd_set_link(nd, err); - return 0; + return NULL; } -static void nfs_put_link(struct dentry *dentry, struct nameidata *nd) +static void nfs_put_link(struct dentry *dentry, struct nameidata *nd, void *cookie) { - char *s = nd_get_link(nd); - if (!IS_ERR(s)) { - struct nfs_symlink *p; - struct page *page; - - p = container_of(s, struct nfs_symlink, body[0]); - page = p->page; - + if (cookie) { + struct page *page = cookie; kunmap(page); page_cache_release(page); } diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c index fae57c83a722..de402fa915f2 100644 --- a/fs/sysfs/symlink.c +++ b/fs/sysfs/symlink.c @@ -151,17 +151,17 @@ static int sysfs_getlink(struct dentry *dentry, char * path) } -static int sysfs_follow_link(struct dentry *dentry, struct nameidata *nd) +static void *sysfs_follow_link(struct dentry *dentry, struct nameidata *nd) { int error = -ENOMEM; unsigned long page = get_zeroed_page(GFP_KERNEL); if (page) error = sysfs_getlink(dentry, (char *) page); nd_set_link(nd, error ? ERR_PTR(error) : (char *)page); - return 0; + return NULL; } -static void sysfs_put_link(struct dentry *dentry, struct nameidata *nd) +static void sysfs_put_link(struct dentry *dentry, struct nameidata *nd, void *cookie) { char *page = nd_get_link(nd); if (!IS_ERR(page)) diff --git a/include/linux/fs.h b/include/linux/fs.h index f9adf75fd9b4..67e6732d4fdc 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -993,8 +993,8 @@ struct inode_operations { int (*rename) (struct inode *, struct dentry *, struct inode *, struct dentry *); int (*readlink) (struct dentry *, char __user *,int); - int (*follow_link) (struct dentry *, struct nameidata *); - void (*put_link) (struct dentry *, struct nameidata *); + void * (*follow_link) (struct dentry *, struct nameidata *); + void (*put_link) (struct dentry *, struct nameidata *, void *); void (*truncate) (struct inode *); int (*permission) (struct inode *, int, struct nameidata *); int (*setattr) (struct dentry *, struct iattr *); @@ -1602,8 +1602,8 @@ extern struct file_operations generic_ro_fops; extern int vfs_readlink(struct dentry *, char __user *, int, const char *); extern int vfs_follow_link(struct nameidata *, const char *); extern int page_readlink(struct dentry *, char __user *, int); -extern int page_follow_link_light(struct dentry *, struct nameidata *); -extern void page_put_link(struct dentry *, struct nameidata *); +extern void *page_follow_link_light(struct dentry *, struct nameidata *); +extern void page_put_link(struct dentry *, struct nameidata *, void *); extern int page_symlink(struct inode *inode, const char *symname, int len); extern struct inode_operations page_symlink_inode_operations; extern int generic_readlink(struct dentry *, char __user *, int); diff --git a/mm/shmem.c b/mm/shmem.c index e64fa726a790..5a81b1ee4f7a 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -1773,32 +1773,27 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s return 0; } -static int shmem_follow_link_inline(struct dentry *dentry, struct nameidata *nd) +static void *shmem_follow_link_inline(struct dentry *dentry, struct nameidata *nd) { nd_set_link(nd, (char *)SHMEM_I(dentry->d_inode)); - return 0; + return NULL; } -static int shmem_follow_link(struct dentry *dentry, struct nameidata *nd) +static void *shmem_follow_link(struct dentry *dentry, struct nameidata *nd) { struct page *page = NULL; int res = shmem_getpage(dentry->d_inode, 0, &page, SGP_READ, NULL); nd_set_link(nd, res ? ERR_PTR(res) : kmap(page)); - return 0; + return page; } -static void shmem_put_link(struct dentry *dentry, struct nameidata *nd) +static void shmem_put_link(struct dentry *dentry, struct nameidata *nd, void *cookie) { if (!IS_ERR(nd_get_link(nd))) { - struct page *page; - - page = find_get_page(dentry->d_inode->i_mapping, 0); - if (!page) - BUG(); + struct page *page = cookie; kunmap(page); mark_page_accessed(page); page_cache_release(page); - page_cache_release(page); } } -- cgit v1.2.3