From 05fa3135fdc7b9b510b502a35b6b97d2b38c6f48 Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Sat, 30 Oct 2010 17:31:15 -0400 Subject: locks: fix setlease methods to free passed-in lock We modified setlease to require the caller to allocate the new lease in the case of creating a new lease, but forgot to fix up the filesystem methods. Cc: Steven Whitehouse Cc: Steve French Cc: Trond Myklebust Signed-off-by: J. Bruce Fields Acked-by: Arnd Bergmann Signed-off-by: Linus Torvalds --- fs/nfs/file.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/file.c b/fs/nfs/file.c index e756075637b0..1e524fb73ba5 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -884,6 +884,7 @@ static int nfs_setlease(struct file *file, long arg, struct file_lock **fl) dprintk("NFS: setlease(%s/%s, arg=%ld)\n", file->f_path.dentry->d_parent->d_name.name, file->f_path.dentry->d_name.name, arg); - + if (arg != F_UNLCK) + locks_free_lock(*fl); return -EINVAL; } -- cgit From 51ee4b84f5c86935b438d6636f34b523edb415a8 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 31 Oct 2010 08:35:10 -0400 Subject: locks: let the caller free file_lock on ->setlease failure The caller allocated it, the caller should free it. The only issue so far is that we could change the flp pointer even on an error return if the fl_change callback failed. But we can simply move the flp assignment after the fl_change invocation, as the callers don't care about the flp return value if the setlease call failed. Signed-off-by: Christoph Hellwig Signed-off-by: Linus Torvalds --- fs/nfs/file.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 1e524fb73ba5..60677f9f1311 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -884,7 +884,5 @@ static int nfs_setlease(struct file *file, long arg, struct file_lock **fl) dprintk("NFS: setlease(%s/%s, arg=%ld)\n", file->f_path.dentry->d_parent->d_name.name, file->f_path.dentry->d_name.name, arg); - if (arg != F_UNLCK) - locks_free_lock(*fl); return -EINVAL; } -- cgit From 1e657bd51f313d87fbbb22d1edf625dba87ef353 Mon Sep 17 00:00:00 2001 From: Paulius Zaleckas Date: Sun, 31 Oct 2010 18:21:05 +0200 Subject: Regression: fix mounting NFS when NFSv3 support is not compiled Trying to mount NFS (root partition in my case) fails if CONFIG_NFS_V3 is not selected. nfs_validate_mount_data() returns EPROTONOSUPPORT, because of this check: #ifndef CONFIG_NFS_V3 if (args->version == 3) goto out_v3_not_compiled; #endif /* !CONFIG_NFS_V3 */ and args->version was always initialized to 3. It was working in 2.6.36 Signed-off-by: Paulius Zaleckas Signed-off-by: Trond Myklebust --- fs/nfs/super.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 0a42e8f4adcb..9587506d493c 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -67,6 +67,12 @@ #define NFSDBG_FACILITY NFSDBG_VFS +#ifdef CONFIG_NFS_V3 +#define NFS_DEFAULT_VERSION 3 +#else +#define NFS_DEFAULT_VERSION 2 +#endif + enum { /* Mount options that take no arguments */ Opt_soft, Opt_hard, @@ -2277,7 +2283,7 @@ static int nfs_get_sb(struct file_system_type *fs_type, }; int error = -ENOMEM; - data = nfs_alloc_parsed_mount_data(3); + data = nfs_alloc_parsed_mount_data(NFS_DEFAULT_VERSION); mntfh = nfs_alloc_fhandle(); if (data == NULL || mntfh == NULL) goto out_free_fh; -- cgit From 23ebbd9acf5756b6eb783df84403e3ab668a6bce Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Wed, 3 Nov 2010 10:24:16 -0400 Subject: Revert "NFSv4: Fall back to ordinary lookup if nfs4_atomic_open() returns EISDIR" This reverts commit 80e60639f1b7c121a7fea53920c5a4b94009361a. This change requires further fixes to ensure that the open doesn't succeed if the lookup later results in a regular file being created. Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 07ac3847e562..635ff65d3092 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -1345,12 +1345,12 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry res = NULL; goto out; /* This turned out not to be a regular file */ - case -EISDIR: case -ENOTDIR: goto no_open; case -ELOOP: if (!(nd->intent.open.flags & O_NOFOLLOW)) goto no_open; + /* case -EISDIR: */ /* case -EINVAL: */ default: res = ERR_CAST(inode); -- cgit From 8cd51a0ccd1beda4482507769887c0be9d70f8c1 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 15 Nov 2010 20:26:22 -0500 Subject: NFS: Fix a couple of regressions in readdir. Fix up the issue that array->eof_index needs to be able to be set even if array->size == 0. Ensure that we catch all important memory allocation error conditions and/or kmap() failures. Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 90 +++++++++++++++++++++++++++++++++++++----------------------- 1 file changed, 56 insertions(+), 34 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 635ff65d3092..c6ce8af266ed 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -194,9 +194,13 @@ typedef struct { static struct nfs_cache_array *nfs_readdir_get_array(struct page *page) { + void *ptr; if (page == NULL) return ERR_PTR(-EIO); - return (struct nfs_cache_array *)kmap(page); + ptr = kmap(page); + if (ptr == NULL) + return ERR_PTR(-ENOMEM); + return ptr; } static @@ -213,6 +217,9 @@ int nfs_readdir_clear_array(struct page *page, gfp_t mask) { struct nfs_cache_array *array = nfs_readdir_get_array(page); int i; + + if (IS_ERR(array)) + return PTR_ERR(array); for (i = 0; i < array->size; i++) kfree(array->array[i].string.name); nfs_readdir_release_array(page); @@ -244,7 +251,7 @@ int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page) if (IS_ERR(array)) return PTR_ERR(array); - ret = -EIO; + ret = -ENOSPC; if (array->size >= MAX_READDIR_ARRAY) goto out; @@ -255,9 +262,9 @@ int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page) if (ret) goto out; array->last_cookie = entry->cookie; + array->size++; if (entry->eof == 1) array->eof_index = array->size; - array->size++; out: nfs_readdir_release_array(page); return ret; @@ -272,7 +279,7 @@ int nfs_readdir_search_for_pos(struct nfs_cache_array *array, nfs_readdir_descri if (diff < 0) goto out_eof; if (diff >= array->size) { - if (array->eof_index > 0) + if (array->eof_index >= 0) goto out_eof; desc->current_index += array->size; return -EAGAIN; @@ -281,8 +288,6 @@ int nfs_readdir_search_for_pos(struct nfs_cache_array *array, nfs_readdir_descri index = (unsigned int)diff; *desc->dir_cookie = array->array[index].cookie; desc->cache_entry_index = index; - if (index == array->eof_index) - desc->eof = 1; return 0; out_eof: desc->eof = 1; @@ -296,17 +301,17 @@ int nfs_readdir_search_for_cookie(struct nfs_cache_array *array, nfs_readdir_des int status = -EAGAIN; for (i = 0; i < array->size; i++) { - if (i == array->eof_index) { - desc->eof = 1; - status = -EBADCOOKIE; - } if (array->array[i].cookie == *desc->dir_cookie) { desc->cache_entry_index = i; status = 0; - break; + goto out; } } - + if (i == array->eof_index) { + desc->eof = 1; + status = -EBADCOOKIE; + } +out: return status; } @@ -449,7 +454,7 @@ out: /* Perform conversion from xdr to cache array */ static -void nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *entry, +int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *entry, void *xdr_page, struct page *page, unsigned int buflen) { struct xdr_stream stream; @@ -471,21 +476,29 @@ void nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *e do { status = xdr_decode(desc, entry, &stream); - if (status != 0) + if (status != 0) { + if (status == -EAGAIN) + status = 0; break; + } - if (nfs_readdir_add_to_array(entry, page) == -1) - break; if (desc->plus == 1) nfs_prime_dcache(desc->file->f_path.dentry, entry); + + status = nfs_readdir_add_to_array(entry, page); + if (status != 0) + break; } while (!entry->eof); if (status == -EBADCOOKIE && entry->eof) { array = nfs_readdir_get_array(page); - array->eof_index = array->size - 1; - status = 0; - nfs_readdir_release_array(page); + if (!IS_ERR(array)) { + array->eof_index = array->size; + status = 0; + nfs_readdir_release_array(page); + } } + return status; } static @@ -537,7 +550,7 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, struct nfs_entry entry; struct file *file = desc->file; struct nfs_cache_array *array; - int status = 0; + int status = -ENOMEM; unsigned int array_size = ARRAY_SIZE(pages); entry.prev_cookie = 0; @@ -549,6 +562,10 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, goto out; array = nfs_readdir_get_array(page); + if (IS_ERR(array)) { + status = PTR_ERR(array); + goto out; + } memset(array, 0, sizeof(struct nfs_cache_array)); array->eof_index = -1; @@ -560,8 +577,13 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, if (status < 0) break; - nfs_readdir_page_filler(desc, &entry, pages_ptr, page, array_size * PAGE_SIZE); - } while (array->eof_index < 0 && array->size < MAX_READDIR_ARRAY); + status = nfs_readdir_page_filler(desc, &entry, pages_ptr, page, array_size * PAGE_SIZE); + if (status < 0) { + if (status == -ENOSPC) + status = 0; + break; + } + } while (array->eof_index < 0); nfs_readdir_free_large_page(pages_ptr, pages, array_size); out_release_array: @@ -582,8 +604,10 @@ static int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page* page) { struct inode *inode = desc->file->f_path.dentry->d_inode; + int ret; - if (nfs_readdir_xdr_to_array(desc, page, inode) < 0) + ret = nfs_readdir_xdr_to_array(desc, page, inode); + if (ret < 0) goto error; SetPageUptodate(page); @@ -595,7 +619,7 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page* page) return 0; error: unlock_page(page); - return -EIO; + return ret; } static @@ -608,12 +632,8 @@ void cache_page_release(nfs_readdir_descriptor_t *desc) static struct page *get_cache_page(nfs_readdir_descriptor_t *desc) { - struct page *page; - page = read_cache_page(desc->file->f_path.dentry->d_inode->i_mapping, + return read_cache_page(desc->file->f_path.dentry->d_inode->i_mapping, desc->page_index, (filler_t *)nfs_readdir_filler, desc); - if (IS_ERR(page)) - desc->eof = 1; - return page; } /* @@ -639,8 +659,10 @@ int find_cache_page(nfs_readdir_descriptor_t *desc) static inline int readdir_search_pagecache(nfs_readdir_descriptor_t *desc) { - int res = -EAGAIN; + int res; + if (desc->page_index == 0) + desc->current_index = 0; while (1) { res = find_cache_page(desc); if (res != -EAGAIN) @@ -670,6 +692,8 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, struct dentry *dentry = NULL; array = nfs_readdir_get_array(desc->page); + if (IS_ERR(array)) + return PTR_ERR(array); for (i = desc->cache_entry_index; i < array->size; i++) { d_type = DT_UNKNOWN; @@ -685,11 +709,9 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, *desc->dir_cookie = array->array[i+1].cookie; else *desc->dir_cookie = array->last_cookie; - if (i == array->eof_index) { - desc->eof = 1; - break; - } } + if (i == array->eof_index) + desc->eof = 1; nfs_readdir_release_array(desc->page); cache_page_release(desc); -- cgit From ac39612824e1fad8baf82c2841e42b2142af3445 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 15 Nov 2010 20:26:22 -0500 Subject: NFS: readdir shouldn't read beyond the reply returned by the server Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 4 +++- fs/nfs/nfs2xdr.c | 4 ++-- fs/nfs/nfs3xdr.c | 4 ++-- fs/nfs/nfs4proc.c | 4 +++- fs/nfs/nfs4xdr.c | 2 +- 5 files changed, 11 insertions(+), 7 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index c6ce8af266ed..c9196c9cf5a6 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -573,11 +573,13 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, if (!pages_ptr) goto out_release_array; do { + unsigned int pglen; status = nfs_readdir_xdr_filler(pages, desc, &entry, file, inode); if (status < 0) break; - status = nfs_readdir_page_filler(desc, &entry, pages_ptr, page, array_size * PAGE_SIZE); + pglen = status; + status = nfs_readdir_page_filler(desc, &entry, pages_ptr, page, pglen); if (status < 0) { if (status == -ENOSPC) status = 0; diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c index e6bf45710cc7..2563f765c9b4 100644 --- a/fs/nfs/nfs2xdr.c +++ b/fs/nfs/nfs2xdr.c @@ -423,7 +423,7 @@ nfs_xdr_readdirres(struct rpc_rqst *req, __be32 *p, void *dummy) struct page **page; size_t hdrlen; unsigned int pglen, recvd; - int status, nr = 0; + int status; if ((status = ntohl(*p++))) return nfs_stat_to_errno(status); @@ -443,7 +443,7 @@ nfs_xdr_readdirres(struct rpc_rqst *req, __be32 *p, void *dummy) if (pglen > recvd) pglen = recvd; page = rcvbuf->pages; - return nr; + return pglen; } static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c index d9a5e832c257..748dc91a4a14 100644 --- a/fs/nfs/nfs3xdr.c +++ b/fs/nfs/nfs3xdr.c @@ -555,7 +555,7 @@ nfs3_xdr_readdirres(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirres *res struct page **page; size_t hdrlen; u32 recvd, pglen; - int status, nr = 0; + int status; status = ntohl(*p++); /* Decode post_op_attrs */ @@ -586,7 +586,7 @@ nfs3_xdr_readdirres(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirres *res pglen = recvd; page = rcvbuf->pages; - return nr; + return pglen; } __be32 * diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 0f24cdf2cb13..6a653ffd8e4e 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -2852,8 +2852,10 @@ static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); res.pgbase = args.pgbase; status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0); - if (status == 0) + if (status >= 0) { memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); + status += args.pgbase; + } nfs_invalidate_atime(dir); diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index f313c4cce7e4..b7a204ff6fe1 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -4518,7 +4518,7 @@ static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct n xdr_read_pages(xdr, pglen); - return 0; + return pglen; } static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req) -- cgit From 04e4bd1c67f941d81bff78a3b6b94194f081b7df Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Thu, 11 Nov 2010 12:53:47 +0000 Subject: nfs: Ignore kmemleak false positive in nfs_readdir_make_qstr Strings allocated via kmemdup() in nfs_readdir_make_qstr() are referenced from the nfs_cache_array which is stored in a page cache page. Kmemleak does not scan such pages and it reports several false positives. This patch annotates the string->name pointer so that kmemleak does not consider it a real leak. Signed-off-by: Catalin Marinas Cc: Bryan Schumaker Cc: Trond Myklebust Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index c9196c9cf5a6..662df2a5fad5 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -34,6 +34,7 @@ #include #include #include +#include #include "delegation.h" #include "iostat.h" @@ -238,6 +239,11 @@ int nfs_readdir_make_qstr(struct qstr *string, const char *name, unsigned int le string->name = kmemdup(name, len, GFP_KERNEL); if (string->name == NULL) return -ENOMEM; + /* + * Avoid a kmemleak false positive. The pointer to the name is stored + * in a page cache page which kmemleak does not scan. + */ + kmemleak_not_leak(string->name); string->hash = full_name_hash(name, len); return 0; } -- cgit From 451a3c24b0135bce54542009b5fde43846c7cf67 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Wed, 17 Nov 2010 16:26:55 +0100 Subject: BKL: remove extraneous #include The big kernel lock has been removed from all these files at some point, leaving only the #include. Remove this too as a cleanup. Signed-off-by: Arnd Bergmann Signed-off-by: Linus Torvalds --- fs/nfs/callback.c | 1 - fs/nfs/delegation.c | 1 - fs/nfs/super.c | 1 - 3 files changed, 3 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c index aeec017fe814..93a8b3bd69e3 100644 --- a/fs/nfs/callback.c +++ b/fs/nfs/callback.c @@ -9,7 +9,6 @@ #include #include #include -#include #include #include #include diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index 232a7eead33a..1fd62fc49be3 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -11,7 +11,6 @@ #include #include #include -#include #include #include diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 9587506d493c..3c045044fca2 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -39,7 +39,6 @@ #include #include #include -#include #include #include #include -- cgit From b47d19de2c714020ba8f5545a6e7d4968f37eb45 Mon Sep 17 00:00:00 2001 From: Arun Bharadwaj Date: Thu, 18 Nov 2010 10:36:43 +0000 Subject: Pure nfs client performance using odirect. When an application opens a file with O_DIRECT flag, if the size of the data that is written is equal to wsize, the client sends a WRITE RPC with stable flag set to UNSTABLE followed by a single COMMIT RPC rather than sending a single WRITE RPC with the stable flag set to FILE_SYNC. This a bug. Patch to fix this. Signed-off-by: Arun R Bharadwaj Signed-off-by: Trond Myklebust --- fs/nfs/direct.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index 84d3c8b90206..e6ace0d93c71 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -867,7 +867,7 @@ static ssize_t nfs_direct_write(struct kiocb *iocb, const struct iovec *iov, goto out; nfs_alloc_commit_data(dreq); - if (dreq->commit_data == NULL || count < wsize) + if (dreq->commit_data == NULL || count <= wsize) sync = NFS_FILE_SYNC; dreq->inode = inode; -- cgit From 463a376eae1c92a66c912af539bfd4bbefa37673 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 20 Nov 2010 12:22:20 -0500 Subject: NFS: Buffer overflow in ->decode_dirent() should not be fatal Overflowing the buffer in the readdir ->decode_dirent() should not lead to a fatal error, but rather to an attempt to reread the record in question. Signed-off-by: Trond Myklebust --- fs/nfs/nfs2xdr.c | 2 +- fs/nfs/nfs3xdr.c | 2 +- fs/nfs/nfs4xdr.c | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c index 2563f765c9b4..ab5937734f0b 100644 --- a/fs/nfs/nfs2xdr.c +++ b/fs/nfs/nfs2xdr.c @@ -495,7 +495,7 @@ nfs_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_se out_overflow: print_overflow_msg(__func__, xdr); - return ERR_PTR(-EIO); + return ERR_PTR(-EAGAIN); } /* diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c index 748dc91a4a14..e79e4f5f5d53 100644 --- a/fs/nfs/nfs3xdr.c +++ b/fs/nfs/nfs3xdr.c @@ -656,7 +656,7 @@ nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_s out_overflow: print_overflow_msg(__func__, xdr); out_overflow_exit: - return ERR_PTR(-EIO); + return ERR_PTR(-EAGAIN); } /* diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index b7a204ff6fe1..a3b39cbc90f9 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -6221,7 +6221,7 @@ __be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, out_overflow: print_overflow_msg(__func__, xdr); - return ERR_PTR(-EIO); + return ERR_PTR(-EAGAIN); } /* -- cgit From 5c346854d8ce6ca91931f8fc9177934257a667d0 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 20 Nov 2010 12:43:45 -0500 Subject: NFS: Assume eof if the server returns no readdir records Some servers are known to be buggy w.r.t. this. Deal with them... Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 662df2a5fad5..2789cb3fc425 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -466,8 +466,9 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en struct xdr_stream stream; struct xdr_buf buf; __be32 *ptr = xdr_page; - int status; struct nfs_cache_array *array; + unsigned int count = 0; + int status; buf.head->iov_base = xdr_page; buf.head->iov_len = buflen; @@ -488,6 +489,8 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en break; } + count++; + if (desc->plus == 1) nfs_prime_dcache(desc->file->f_path.dentry, entry); @@ -496,13 +499,14 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en break; } while (!entry->eof); - if (status == -EBADCOOKIE && entry->eof) { + if (count == 0 || (status == -EBADCOOKIE && entry->eof == 1)) { array = nfs_readdir_get_array(page); if (!IS_ERR(array)) { array->eof_index = array->size; status = 0; nfs_readdir_release_array(page); - } + } else + status = PTR_ERR(array); } return status; } -- cgit From e7c58e974a0318fcca5368e7b3570e10e9ae9028 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 20 Nov 2010 13:22:24 -0500 Subject: NFS: Fix a page leak in nfs_do_filldir() nfs_do_filldir() must always free desc->page when it is done, otherwise we end up leaking the page. Also remove unused variable 'dentry'. Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 2789cb3fc425..42e66e961d73 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -701,11 +701,12 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, int res = 0; struct nfs_cache_array *array = NULL; unsigned int d_type = DT_UNKNOWN; - struct dentry *dentry = NULL; array = nfs_readdir_get_array(desc->page); - if (IS_ERR(array)) - return PTR_ERR(array); + if (IS_ERR(array)) { + res = PTR_ERR(array); + goto out; + } for (i = desc->cache_entry_index; i < array->size; i++) { d_type = DT_UNKNOWN; @@ -726,9 +727,8 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, desc->eof = 1; nfs_readdir_release_array(desc->page); +out: cache_page_release(desc); - if (dentry != NULL) - dput(dentry); dfprintk(DIRCACHE, "NFS: nfs_do_filldir() filling ended @ cookie %Lu; returning = %d\n", (unsigned long long)*desc->dir_cookie, res); return res; -- cgit From 7a8e1dc34f52fd2927dbf7e520d7cd8eadc51336 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 20 Nov 2010 13:24:46 -0500 Subject: NFS: Fix a page leak in uncached_readdir() Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 42e66e961d73..353f47c31b1d 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -763,13 +763,14 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent, goto out; } + desc->page_index = 0; + desc->page = page; + if (nfs_readdir_xdr_to_array(desc, page, inode) == -1) { status = -EIO; goto out_release; } - desc->page_index = 0; - desc->page = page; status = nfs_do_filldir(desc, dirent, filldir); out: -- cgit From 85f8607e163f8d281fb407357279cb4ac6df12e6 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 20 Nov 2010 13:24:49 -0500 Subject: NFS: Fix the error handling in "uncached_readdir()" Currently, uncached_readdir() is broken because if fails to handle the results from nfs_readdir_xdr_to_array() correctly. Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 353f47c31b1d..2492bacf68a7 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -766,10 +766,9 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent, desc->page_index = 0; desc->page = page; - if (nfs_readdir_xdr_to_array(desc, page, inode) == -1) { - status = -EIO; + status = nfs_readdir_xdr_to_array(desc, page, inode); + if (status < 0) goto out_release; - } status = nfs_do_filldir(desc, dirent, filldir); -- cgit From ece0b4233b6b915d1f63add2bd9f2733aec6317a Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 20 Nov 2010 13:55:33 -0500 Subject: NFS: Don't ignore errors from nfs_do_filldir() We should ignore the errors from the filldir callback, and just interpret them as meaning we should exit, however we should definitely pass back ENOMEM errors. Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 2492bacf68a7..ddc2e439702b 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -709,13 +709,15 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, } for (i = desc->cache_entry_index; i < array->size; i++) { + struct nfs_cache_array_entry *ent; d_type = DT_UNKNOWN; - res = filldir(dirent, array->array[i].string.name, - array->array[i].string.len, file->f_pos, - nfs_compat_user_ino64(array->array[i].ino), d_type); - if (res < 0) + ent = &array->array[i]; + if (filldir(dirent, ent->string.name, ent->string.len, + file->f_pos, nfs_compat_user_ino64(ent->ino), d_type) < 0) { + desc->eof = 1; break; + } file->f_pos++; desc->cache_entry_index = i; if (i < (array->size-1)) @@ -820,14 +822,14 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) res = readdir_search_pagecache(desc); if (res == -EBADCOOKIE) { + res = 0; /* This means either end of directory */ if (*desc->dir_cookie && desc->eof == 0) { /* Or that the server has 'lost' a cookie */ res = uncached_readdir(desc, dirent, filldir); - if (res >= 0) + if (res == 0) continue; } - res = 0; break; } if (res == -ETOOSMALL && desc->plus) { @@ -842,10 +844,8 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) break; res = nfs_do_filldir(desc, dirent, filldir); - if (res < 0) { - res = 0; + if (res < 0) break; - } } out: nfs_unblock_sillyrename(dentry); -- cgit From 3020093f578fb6c9acc6914dfd887a1ebd1db659 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 20 Nov 2010 15:18:22 -0500 Subject: NFS: Correct the array bound calculation in nfs_readdir_add_to_array It looks as if the array size calculation in MAX_READDIR_ARRAY does not take the alignment of struct nfs_cache_array_entry into account. Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index ddc2e439702b..ced7291cc5f8 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -171,8 +171,6 @@ struct nfs_cache_array { struct nfs_cache_array_entry array[0]; }; -#define MAX_READDIR_ARRAY ((PAGE_SIZE - sizeof(struct nfs_cache_array)) / sizeof(struct nfs_cache_array_entry)) - typedef __be32 * (*decode_dirent_t)(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int); typedef struct { struct file *file; @@ -257,11 +255,14 @@ int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page) if (IS_ERR(array)) return PTR_ERR(array); + + cache_entry = &array->array[array->size]; + + /* Check that this entry lies within the page bounds */ ret = -ENOSPC; - if (array->size >= MAX_READDIR_ARRAY) + if ((char *)&cache_entry[1] - (char *)page_address(page) > PAGE_SIZE) goto out; - cache_entry = &array->array[array->size]; cache_entry->cookie = entry->prev_cookie; cache_entry->ino = entry->ino; ret = nfs_readdir_make_qstr(&cache_entry->string, entry->name, entry->len); -- cgit From 0b26a0bf6ff398185546432420bb772bcfdf8d94 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 20 Nov 2010 14:26:44 -0500 Subject: NFS: Ensure we return the dirent->d_type when it is known Store the dirent->d_type in the struct nfs_cache_array_entry so that we can use it in getdents() calls. This fixes a regression with the new readdir code. Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 7 ++++--- fs/nfs/internal.h | 9 +++++++++ fs/nfs/nfs2xdr.c | 2 ++ fs/nfs/nfs3xdr.c | 2 ++ fs/nfs/nfs4xdr.c | 4 ++++ 5 files changed, 21 insertions(+), 3 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index ced7291cc5f8..8ea4a4180a87 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -162,6 +162,7 @@ struct nfs_cache_array_entry { u64 cookie; u64 ino; struct qstr string; + unsigned char d_type; }; struct nfs_cache_array { @@ -265,6 +266,7 @@ int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page) cache_entry->cookie = entry->prev_cookie; cache_entry->ino = entry->ino; + cache_entry->d_type = entry->d_type; ret = nfs_readdir_make_qstr(&cache_entry->string, entry->name, entry->len); if (ret) goto out; @@ -701,7 +703,6 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, int i = 0; int res = 0; struct nfs_cache_array *array = NULL; - unsigned int d_type = DT_UNKNOWN; array = nfs_readdir_get_array(desc->page); if (IS_ERR(array)) { @@ -711,11 +712,11 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, for (i = desc->cache_entry_index; i < array->size; i++) { struct nfs_cache_array_entry *ent; - d_type = DT_UNKNOWN; ent = &array->array[i]; if (filldir(dirent, ent->string.name, ent->string.len, - file->f_pos, nfs_compat_user_ino64(ent->ino), d_type) < 0) { + file->f_pos, nfs_compat_user_ino64(ent->ino), + ent->d_type) < 0) { desc->eof = 1; break; } diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index db08ff3ff454..e6356b750b77 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -361,6 +361,15 @@ unsigned int nfs_page_length(struct page *page) return 0; } +/* + * Convert a umode to a dirent->d_type + */ +static inline +unsigned char nfs_umode_to_dtype(umode_t mode) +{ + return (mode >> 12) & 15; +} + /* * Determine the number of pages in an array of length 'len' and * with a base offset of 'base' diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c index ab5937734f0b..5914a1911c95 100644 --- a/fs/nfs/nfs2xdr.c +++ b/fs/nfs/nfs2xdr.c @@ -485,6 +485,8 @@ nfs_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_se entry->prev_cookie = entry->cookie; entry->cookie = ntohl(*p++); + entry->d_type = DT_UNKNOWN; + p = xdr_inline_peek(xdr, 8); if (p != NULL) entry->eof = !p[0] && p[1]; diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c index e79e4f5f5d53..f6cc60f06dac 100644 --- a/fs/nfs/nfs3xdr.c +++ b/fs/nfs/nfs3xdr.c @@ -622,11 +622,13 @@ nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_s entry->prev_cookie = entry->cookie; p = xdr_decode_hyper(p, &entry->cookie); + entry->d_type = DT_UNKNOWN; if (plus) { entry->fattr->valid = 0; p = xdr_decode_post_op_attr_stream(xdr, entry->fattr); if (IS_ERR(p)) goto out_overflow_exit; + entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); /* In fact, a post_op_fh3: */ p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index a3b39cbc90f9..9f1826b012e6 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -6208,6 +6208,10 @@ __be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID) entry->ino = entry->fattr->fileid; + entry->d_type = DT_UNKNOWN; + if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE) + entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); + if (verify_attr_len(xdr, p, len) < 0) goto out_overflow; -- cgit From 37a09f07459753e7c98d4e21f1c61e8756923f81 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 30 Nov 2010 12:42:34 -0500 Subject: NFS: Fix a readdirplus bug When comparing filehandles in the helper nfs_same_file(), we should not be using 'strncmp()': filehandles are not null terminated strings. Instead, we should just use the existing helper nfs_compare_fh(). Signed-off-by: Trond Myklebust Signed-off-by: Linus Torvalds --- fs/nfs/dir.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 8ea4a4180a87..f0a384e2ae63 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -395,13 +395,9 @@ int xdr_decode(nfs_readdir_descriptor_t *desc, struct nfs_entry *entry, struct x static int nfs_same_file(struct dentry *dentry, struct nfs_entry *entry) { - struct nfs_inode *node; if (dentry->d_inode == NULL) goto different; - node = NFS_I(dentry->d_inode); - if (node->fh.size != entry->fh->size) - goto different; - if (strncmp(node->fh.data, entry->fh->data, node->fh.size) != 0) + if (nfs_compare_fh(entry->fh, NFS_FH(dentry->d_inode)) != 0) goto different; return 1; different: -- cgit From 0aded708d125a3ff7e5abaea9c2d9c6d7ebbfdcd Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 30 Nov 2010 21:56:32 -0500 Subject: NFS: Ensure we use the correct cookie in nfs_readdir_xdr_filler We need to use the cookie from the previous array entry, not the actual cookie that we are searching for (except for the case of uncached_readdir). Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index f0a384e2ae63..e03537ff9350 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -178,6 +178,7 @@ typedef struct { struct page *page; unsigned long page_index; u64 *dir_cookie; + u64 last_cookie; loff_t current_index; decode_dirent_t decode; @@ -344,6 +345,8 @@ int nfs_readdir_search_array(nfs_readdir_descriptor_t *desc) else status = nfs_readdir_search_for_cookie(array, desc); + if (status == -EAGAIN) + desc->last_cookie = array->last_cookie; nfs_readdir_release_array(desc->page); out: return status; @@ -563,7 +566,7 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, unsigned int array_size = ARRAY_SIZE(pages); entry.prev_cookie = 0; - entry.cookie = *desc->dir_cookie; + entry.cookie = desc->last_cookie; entry.eof = 0; entry.fh = nfs_alloc_fhandle(); entry.fattr = nfs_alloc_fattr(); @@ -672,8 +675,10 @@ int readdir_search_pagecache(nfs_readdir_descriptor_t *desc) { int res; - if (desc->page_index == 0) + if (desc->page_index == 0) { desc->current_index = 0; + desc->last_cookie = 0; + } while (1) { res = find_cache_page(desc); if (res != -EAGAIN) @@ -764,6 +769,7 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent, } desc->page_index = 0; + desc->last_cookie = *desc->dir_cookie; desc->page = page; status = nfs_readdir_xdr_to_array(desc, page, inode); -- cgit From 11de3b11e08cac26d59e88efaf4e316701883552 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Wed, 1 Dec 2010 14:17:06 -0500 Subject: NFS: Fix a memory leak in nfs_readdir We need to ensure that the entries in the nfs_cache_array get cleared when the page is removed from the page cache. To do so, we use the freepage address_space operation. Change nfs_readdir_clear_array to use kmap_atomic(), so that the function can be safely called from all contexts. Finally, modify the cache_page_release helper to call nfs_readdir_clear_array directly, when dealing with an anonymous page from 'uncached_readdir'. Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 18 +++++++++--------- fs/nfs/inode.c | 1 + 2 files changed, 10 insertions(+), 9 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index e03537ff9350..d529e0e99efa 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -57,7 +57,7 @@ static int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); static int nfs_fsync_dir(struct file *, int); static loff_t nfs_llseek_dir(struct file *, loff_t, int); -static int nfs_readdir_clear_array(struct page*, gfp_t); +static void nfs_readdir_clear_array(struct page*); const struct file_operations nfs_dir_operations = { .llseek = nfs_llseek_dir, @@ -83,8 +83,8 @@ const struct inode_operations nfs_dir_inode_operations = { .setattr = nfs_setattr, }; -const struct address_space_operations nfs_dir_addr_space_ops = { - .releasepage = nfs_readdir_clear_array, +const struct address_space_operations nfs_dir_aops = { + .freepage = nfs_readdir_clear_array, }; #ifdef CONFIG_NFS_V3 @@ -214,17 +214,15 @@ void nfs_readdir_release_array(struct page *page) * we are freeing strings created by nfs_add_to_readdir_array() */ static -int nfs_readdir_clear_array(struct page *page, gfp_t mask) +void nfs_readdir_clear_array(struct page *page) { - struct nfs_cache_array *array = nfs_readdir_get_array(page); + struct nfs_cache_array *array; int i; - if (IS_ERR(array)) - return PTR_ERR(array); + array = kmap_atomic(page, KM_USER0); for (i = 0; i < array->size; i++) kfree(array->array[i].string.name); - nfs_readdir_release_array(page); - return 0; + kunmap_atomic(array, KM_USER0); } /* @@ -639,6 +637,8 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page* page) static void cache_page_release(nfs_readdir_descriptor_t *desc) { + if (!desc->page->mapping) + nfs_readdir_clear_array(desc->page); page_cache_release(desc->page); desc->page = NULL; } diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 314f57164602..e67e31c73416 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -289,6 +289,7 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) } else if (S_ISDIR(inode->i_mode)) { inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; inode->i_fop = &nfs_dir_operations; + inode->i_data.a_ops = &nfs_dir_aops; if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)) set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); /* Deal with crossing mountpoints */ -- cgit From 18fb5fe40ce7f789b5cfc3aa81ff1e6175b0a5be Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 7 Dec 2010 12:41:58 -0500 Subject: NFS: nfs_readdir_search_for_cookie() don't mark as eof if cookie not found If we're searching for a specific cookie, and it isn't found in the page cache, we should try an uncached_readdir(). To do so, we return EBADCOOKIE, but we don't set desc->eof. Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index d529e0e99efa..ad2fde23446d 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -316,8 +316,9 @@ int nfs_readdir_search_for_cookie(struct nfs_cache_array *array, nfs_readdir_des } } if (i == array->eof_index) { - desc->eof = 1; status = -EBADCOOKIE; + if (*desc->dir_cookie == array->last_cookie) + desc->eof = 1; } out: return status; -- cgit From 47c716cbf638a16583441d78be3fc24345eab636 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 7 Dec 2010 12:44:56 -0500 Subject: NFS: Readdir cleanups No functional changes, but clarify the code. Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 47 +++++++++++++++++------------------------------ 1 file changed, 17 insertions(+), 30 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index ad2fde23446d..996dd8989a91 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -271,7 +271,7 @@ int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page) goto out; array->last_cookie = entry->cookie; array->size++; - if (entry->eof == 1) + if (entry->eof != 0) array->eof_index = array->size; out: nfs_readdir_release_array(page); @@ -311,16 +311,14 @@ int nfs_readdir_search_for_cookie(struct nfs_cache_array *array, nfs_readdir_des for (i = 0; i < array->size; i++) { if (array->array[i].cookie == *desc->dir_cookie) { desc->cache_entry_index = i; - status = 0; - goto out; + return 0; } } - if (i == array->eof_index) { + if (array->eof_index >= 0) { status = -EBADCOOKIE; if (*desc->dir_cookie == array->last_cookie) desc->eof = 1; } -out: return status; } @@ -328,10 +326,7 @@ static int nfs_readdir_search_array(nfs_readdir_descriptor_t *desc) { struct nfs_cache_array *array; - int status = -EBADCOOKIE; - - if (desc->dir_cookie == NULL) - goto out; + int status; array = nfs_readdir_get_array(desc->page); if (IS_ERR(array)) { @@ -344,8 +339,10 @@ int nfs_readdir_search_array(nfs_readdir_descriptor_t *desc) else status = nfs_readdir_search_for_cookie(array, desc); - if (status == -EAGAIN) + if (status == -EAGAIN) { desc->last_cookie = array->last_cookie; + desc->page_index++; + } nfs_readdir_release_array(desc->page); out: return status; @@ -492,7 +489,7 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en count++; - if (desc->plus == 1) + if (desc->plus != 0) nfs_prime_dcache(desc->file->f_path.dentry, entry); status = nfs_readdir_add_to_array(entry, page); @@ -500,7 +497,7 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en break; } while (!entry->eof); - if (count == 0 || (status == -EBADCOOKIE && entry->eof == 1)) { + if (count == 0 || (status == -EBADCOOKIE && entry->eof != 0)) { array = nfs_readdir_get_array(page); if (!IS_ERR(array)) { array->eof_index = array->size; @@ -664,9 +661,8 @@ int find_cache_page(nfs_readdir_descriptor_t *desc) return PTR_ERR(desc->page); res = nfs_readdir_search_array(desc); - if (res == 0) - return 0; - cache_page_release(desc); + if (res != 0) + cache_page_release(desc); return res; } @@ -680,20 +676,12 @@ int readdir_search_pagecache(nfs_readdir_descriptor_t *desc) desc->current_index = 0; desc->last_cookie = 0; } - while (1) { + do { res = find_cache_page(desc); - if (res != -EAGAIN) - break; - desc->page_index++; - } + } while (res == -EAGAIN); return res; } -static inline unsigned int dt_type(struct inode *inode) -{ - return (inode->i_mode >> 12) & 15; -} - /* * Once we've found the start of the dirent within a page: fill 'er up... */ @@ -723,13 +711,12 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, break; } file->f_pos++; - desc->cache_entry_index = i; if (i < (array->size-1)) *desc->dir_cookie = array->array[i+1].cookie; else *desc->dir_cookie = array->last_cookie; } - if (i == array->eof_index) + if (array->eof_index >= 0) desc->eof = 1; nfs_readdir_release_array(desc->page); @@ -798,7 +785,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) struct inode *inode = dentry->d_inode; nfs_readdir_descriptor_t my_desc, *desc = &my_desc; - int res = -ENOMEM; + int res; dfprintk(FILE, "NFS: readdir(%s/%s) starting at cookie %llu\n", dentry->d_parent->d_name.name, dentry->d_name.name, @@ -823,7 +810,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) if (res < 0) goto out; - while (desc->eof != 1) { + do { res = readdir_search_pagecache(desc); if (res == -EBADCOOKIE) { @@ -851,7 +838,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) res = nfs_do_filldir(desc, dirent, filldir); if (res < 0) break; - } + } while (!desc->eof); out: nfs_unblock_sillyrename(dentry); if (res > 0) -- cgit From 08a22b392a141c201d7ed4d435de942aa853acd3 Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Wed, 1 Dec 2010 10:42:16 +0000 Subject: nfs: Discard ACL cache on mode update An update of mode bits can result in ACL value being changed. We need to mark the acl cache invalid when we update mode. Similarly we need to update file attribute when we change ACL value Signed-off-by: Aneesh Kumar K.V Signed-off-by: Trond Myklebust --- fs/nfs/nfs4proc.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 6a653ffd8e4e..4435e5e1f904 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -3361,6 +3361,8 @@ static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) ret = nfs_revalidate_inode(server, inode); if (ret < 0) return ret; + if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) + nfs_zap_acl_cache(inode); ret = nfs4_read_cached_acl(inode, buf, buflen); if (ret != -ENOENT) return ret; @@ -3389,6 +3391,13 @@ static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t bufl nfs_inode_return_delegation(inode); buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); ret = nfs4_call_sync(server, &msg, &arg, &res, 1); + /* + * Acl update can result in inode attribute update. + * so mark the attribute cache invalid. + */ + spin_lock(&inode->i_lock); + NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; + spin_unlock(&inode->i_lock); nfs_access_zap_cache(inode); nfs_zap_acl_cache(inode); return ret; -- cgit From 21ac19d484a8ffb66f64487846c8d53afef04d2b Mon Sep 17 00:00:00 2001 From: Sergey Vlasov Date: Sun, 28 Nov 2010 21:04:05 +0000 Subject: NFS: Fix fcntl F_GETLK not reporting some conflicts The commit 129a84de2347002f09721cda3155ccfd19fade40 (locks: fix F_GETLK regression (failure to find conflicts)) fixed the posix_test_lock() function by itself, however, its usage in NFS changed by the commit 9d6a8c5c213e34c475e72b245a8eb709258e968c (locks: give posix_test_lock same interface as ->lock) remained broken - subsequent NFS-specific locking code received F_UNLCK instead of the user-specified lock type. To fix the problem, fl->fl_type needs to be saved before the posix_test_lock() call and restored if no local conflicts were reported. Reference: https://bugzilla.kernel.org/show_bug.cgi?id=23892 Tested-by: Alexander Morozov Signed-off-by: Sergey Vlasov Cc: Signed-off-by: Trond Myklebust --- fs/nfs/file.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/nfs') diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 60677f9f1311..7bf029ef4084 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -693,6 +693,7 @@ do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) { struct inode *inode = filp->f_mapping->host; int status = 0; + unsigned int saved_type = fl->fl_type; /* Try local locking first */ posix_test_lock(filp, fl); @@ -700,6 +701,7 @@ do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) /* found a conflict */ goto out; } + fl->fl_type = saved_type; if (nfs_have_delegation(inode, FMODE_READ)) goto out_noconflict; -- cgit From 0de1b7e800188782973598158e0acbb9e08e6c99 Mon Sep 17 00:00:00 2001 From: Mi Jinlong Date: Sat, 30 Oct 2010 10:19:33 +0800 Subject: nfs: kernel should return EPROTONOSUPPORT when not support NFSv4 When nfs client(kernel) don't support NFSv4, maybe user build kernel without NFSv4, there is a problem. Using command "mount SERVER-IP:/nfsv3 /mnt/" to mount NFSv3 filesystem, mount should should success, but fail and get error: "mount.nfs: an incorrect mount option was specified" System call mount "nfs"(not "nfs4") with "vers=4", if CONFIG_NFS_V4 is not defined, the "vers=4" will be parsed as invalid argument and kernel return EINVAL to nfs-utils. About that, we really want get EPROTONOSUPPORT rather than EINVAL. This path make sure kernel parses argument success, and return EPROTONOSUPPORT at nfs_validate_mount_data(). Signed-off-by: Mi Jinlong Signed-off-by: Trond Myklebust --- fs/nfs/super.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 3c045044fca2..4100630c9a5b 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1069,12 +1069,10 @@ static int nfs_parse_mount_options(char *raw, mnt->flags |= NFS_MOUNT_VER3; mnt->version = 3; break; -#ifdef CONFIG_NFS_V4 case Opt_v4: mnt->flags &= ~NFS_MOUNT_VER3; mnt->version = 4; break; -#endif case Opt_udp: mnt->flags &= ~NFS_MOUNT_TCP; mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; @@ -1286,12 +1284,10 @@ static int nfs_parse_mount_options(char *raw, mnt->flags |= NFS_MOUNT_VER3; mnt->version = 3; break; -#ifdef CONFIG_NFS_V4 case NFS4_VERSION: mnt->flags &= ~NFS_MOUNT_VER3; mnt->version = 4; break; -#endif default: goto out_invalid_value; } -- cgit From 2df485a774ba59c3f43bfe84107672c1d9b731a0 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 7 Dec 2010 22:39:17 -0500 Subject: nfs: remove extraneous and problematic calls to nfs_clear_request When a nfs_page is freed, nfs_free_request is called which also calls nfs_clear_request to clean out the lock and open contexts and free the pagecache page. However, a couple of places in the nfs code call nfs_clear_request themselves. What happens here if the refcount on the request is still high? We'll be releasing contexts and freeing pointers while the request is possibly still in use. Remove those bare calls to nfs_clear_context. That should only be done when the request is being freed. Note that when doing this, we need to watch out for tests of req->wb_page. Previously, nfs_set_page_tag_locked() and nfs_clear_page_tag_locked() would check the value of req->wb_page to figure out if the page is mapped into the nfsi->nfs_page_tree. We now indicate the page is mapped using the new bit PG_MAPPED in req->wb_flags . Reported-by: Jeff Layton Signed-off-by: Trond Myklebust --- fs/nfs/pagelist.c | 4 ++-- fs/nfs/read.c | 1 - fs/nfs/write.c | 3 ++- 3 files changed, 4 insertions(+), 4 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index 137b549e63db..b68536cc9046 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -115,7 +115,7 @@ int nfs_set_page_tag_locked(struct nfs_page *req) { if (!nfs_lock_request_dontget(req)) return 0; - if (req->wb_page != NULL) + if (test_bit(PG_MAPPED, &req->wb_flags)) radix_tree_tag_set(&NFS_I(req->wb_context->path.dentry->d_inode)->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_LOCKED); return 1; } @@ -125,7 +125,7 @@ int nfs_set_page_tag_locked(struct nfs_page *req) */ void nfs_clear_page_tag_locked(struct nfs_page *req) { - if (req->wb_page != NULL) { + if (test_bit(PG_MAPPED, &req->wb_flags)) { struct inode *inode = req->wb_context->path.dentry->d_inode; struct nfs_inode *nfsi = NFS_I(inode); diff --git a/fs/nfs/read.c b/fs/nfs/read.c index e4b62c6f5a6e..aedcaa7f291f 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -152,7 +152,6 @@ static void nfs_readpage_release(struct nfs_page *req) (long long)NFS_FILEID(req->wb_context->path.dentry->d_inode), req->wb_bytes, (long long)req_offset(req)); - nfs_clear_request(req); nfs_release_request(req); } diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 4c14c17a5276..10d648ea128b 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -390,6 +390,7 @@ static int nfs_inode_add_request(struct inode *inode, struct nfs_page *req) if (nfs_have_delegation(inode, FMODE_WRITE)) nfsi->change_attr++; } + set_bit(PG_MAPPED, &req->wb_flags); SetPagePrivate(req->wb_page); set_page_private(req->wb_page, (unsigned long)req); nfsi->npages++; @@ -415,6 +416,7 @@ static void nfs_inode_remove_request(struct nfs_page *req) spin_lock(&inode->i_lock); set_page_private(req->wb_page, 0); ClearPagePrivate(req->wb_page); + clear_bit(PG_MAPPED, &req->wb_flags); radix_tree_delete(&nfsi->nfs_page_tree, req->wb_index); nfsi->npages--; if (!nfsi->npages) { @@ -422,7 +424,6 @@ static void nfs_inode_remove_request(struct nfs_page *req) iput(inode); } else spin_unlock(&inode->i_lock); - nfs_clear_request(req); nfs_release_request(req); } -- cgit From 5b362ac3799ff4225c40935500f520cad4d7ed66 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 10 Dec 2010 12:31:14 -0500 Subject: NFS: Fix panic after nfs_umount() After a few unsuccessful NFS mount attempts in which the client and server cannot agree on an authentication flavor both support, the client panics. nfs_umount() is invoked in the kernel in this case. Turns out nfs_umount()'s UMNT RPC invocation causes the RPC client to write off the end of the rpc_clnt's iostat array. This is because the mount client's nrprocs field is initialized with the count of defined procedures (two: MNT and UMNT), rather than the size of the client's proc array (four). The fix is to use the same initialization technique used by most other upper layer clients in the kernel. Introduced by commit 0b524123, which failed to update nrprocs when support was added for UMNT in the kernel. BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=24302 BugLink: http://bugs.launchpad.net/bugs/683938 Reported-by: Stefan Bader Tested-by: Stefan Bader Cc: stable@kernel.org # >= 2.6.32 Signed-off-by: Chuck Lever Signed-off-by: Trond Myklebust --- fs/nfs/mount_clnt.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c index eceafe74f473..4f981f1f6689 100644 --- a/fs/nfs/mount_clnt.c +++ b/fs/nfs/mount_clnt.c @@ -505,13 +505,13 @@ static struct rpc_procinfo mnt3_procedures[] = { static struct rpc_version mnt_version1 = { .number = 1, - .nrprocs = 2, + .nrprocs = ARRAY_SIZE(mnt_procedures), .procs = mnt_procedures, }; static struct rpc_version mnt_version3 = { .number = 3, - .nrprocs = 2, + .nrprocs = ARRAY_SIZE(mnt3_procedures), .procs = mnt3_procedures, }; -- cgit