1 files changed, 153 insertions, 90 deletions

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 268ce3a46220..b7656bd3706f 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -249,13 +249,10 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
         struct inode *inode = ERR_PTR(-ENOENT);
         unsigned long hash;
 
-        if ((fattr->valid & NFS_ATTR_FATTR) == 0)
+        if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
                 goto out_no_inode;
-
-        if (!fattr->nlink) {
-                printk("NFS: Buggy server - nlink == 0!\n");
+        if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
                 goto out_no_inode;
-        }
 
         hash = nfs_fattr_to_ino_t(fattr);
 
@@ -291,7 +288,8 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
                             && fattr->size <= NFS_LIMIT_READDIRPLUS)
                                 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
                         /* Deal with crossing mountpoints */
-                        if (!nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
+                        if ((fattr->valid & NFS_ATTR_FATTR_FSID)
+                                        && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
                                 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
                                         inode->i_op = &nfs_referral_inode_operations;
                                 else
@@ -304,28 +302,45 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
                 else
                         init_special_inode(inode, inode->i_mode, fattr->rdev);
 
+                memset(&inode->i_atime, 0, sizeof(inode->i_atime));
+                memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
+                memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
+                nfsi->change_attr = 0;
+                inode->i_size = 0;
+                inode->i_nlink = 0;
+                inode->i_uid = -2;
+                inode->i_gid = -2;
+                inode->i_blocks = 0;
+                memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
+
                 nfsi->read_cache_jiffies = fattr->time_start;
                 nfsi->attr_gencount = fattr->gencount;
-                inode->i_atime = fattr->atime;
-                inode->i_mtime = fattr->mtime;
-                inode->i_ctime = fattr->ctime;
-                if (fattr->valid & NFS_ATTR_FATTR_V4)
+                if (fattr->valid & NFS_ATTR_FATTR_ATIME)
+                        inode->i_atime = fattr->atime;
+                if (fattr->valid & NFS_ATTR_FATTR_MTIME)
+                        inode->i_mtime = fattr->mtime;
+                if (fattr->valid & NFS_ATTR_FATTR_CTIME)
+                        inode->i_ctime = fattr->ctime;
+                if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
                         nfsi->change_attr = fattr->change_attr;
-                inode->i_size = nfs_size_to_loff_t(fattr->size);
-                inode->i_nlink = fattr->nlink;
-                inode->i_uid = fattr->uid;
-                inode->i_gid = fattr->gid;
-                if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) {
+                if (fattr->valid & NFS_ATTR_FATTR_SIZE)
+                        inode->i_size = nfs_size_to_loff_t(fattr->size);
+                if (fattr->valid & NFS_ATTR_FATTR_NLINK)
+                        inode->i_nlink = fattr->nlink;
+                if (fattr->valid & NFS_ATTR_FATTR_OWNER)
+                        inode->i_uid = fattr->uid;
+                if (fattr->valid & NFS_ATTR_FATTR_GROUP)
+                        inode->i_gid = fattr->gid;
+                if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
+                        inode->i_blocks = fattr->du.nfs2.blocks;
+                if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
                         /*
                          * report the blocks in 512byte units
                          */
                         inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
-                } else {
-                        inode->i_blocks = fattr->du.nfs2.blocks;
                 }
                 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
                 nfsi->attrtimeo_timestamp = now;
-                memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
                 nfsi->access_cache = RB_ROOT;
 
                 unlock_new_inode(inode);
@@ -812,25 +827,31 @@ static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 {
         struct nfs_inode *nfsi = NFS_I(inode);
 
-        if ((fattr->valid & NFS_ATTR_WCC_V4) != 0 &&
-                        nfsi->change_attr == fattr->pre_change_attr) {
+        if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
+                        && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
+                        && nfsi->change_attr == fattr->pre_change_attr) {
                 nfsi->change_attr = fattr->change_attr;
                 if (S_ISDIR(inode->i_mode))
                         nfsi->cache_validity |= NFS_INO_INVALID_DATA;
         }
         /* If we have atomic WCC data, we may update some attributes */
-        if ((fattr->valid & NFS_ATTR_WCC) != 0) {
-                if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime))
+        if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
+                        && (fattr->valid & NFS_ATTR_FATTR_CTIME)
+                        && timespec_equal(&inode->i_ctime, &fattr->pre_ctime))
                         memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
-                if (timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
+
+        if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
+                        && (fattr->valid & NFS_ATTR_FATTR_MTIME)
+                        && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
                         memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
                         if (S_ISDIR(inode->i_mode))
                                 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
-                }
-                if (i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) &&
-                    nfsi->npages == 0)
-                        i_size_write(inode, nfs_size_to_loff_t(fattr->size));
         }
+        if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
+                        && (fattr->valid & NFS_ATTR_FATTR_SIZE)
+                        && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
+                        && nfsi->npages == 0)
+                        i_size_write(inode, nfs_size_to_loff_t(fattr->size));
 }
 
 /**
@@ -850,35 +871,39 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat
 
 
         /* Has the inode gone and changed behind our back? */
-        if (nfsi->fileid != fattr->fileid
-                        || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
+        if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
+                return -EIO;
+        if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
                 return -EIO;
-        }
 
-        if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 &&
+        if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
                         nfsi->change_attr != fattr->change_attr)
                 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
 
         /* Verify a few of the more important attributes */
-        if (!timespec_equal(&inode->i_mtime, &fattr->mtime))
+        if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
                 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
 
-        cur_size = i_size_read(inode);
-        new_isize = nfs_size_to_loff_t(fattr->size);
-        if (cur_size != new_isize && nfsi->npages == 0)
-                invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
+        if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
+                cur_size = i_size_read(inode);
+                new_isize = nfs_size_to_loff_t(fattr->size);
+                if (cur_size != new_isize && nfsi->npages == 0)
+                        invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
+        }
 
         /* Have any file permissions changed? */
-        if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)
-                        || inode->i_uid != fattr->uid
-                        || inode->i_gid != fattr->gid)
+        if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
+                invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
+        if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
+                invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
+        if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
                 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
 
         /* Has the link count changed? */
-        if (inode->i_nlink != fattr->nlink)
+        if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
                 invalid |= NFS_INO_INVALID_ATTR;
 
-        if (!timespec_equal(&inode->i_atime, &fattr->atime))
+        if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
                 invalid |= NFS_INO_INVALID_ATIME;
 
         if (invalid != 0)
@@ -890,11 +915,15 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat
 
 static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
 {
+        if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
+                return 0;
         return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
 }
 
 static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
 {
+        if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
+                return 0;
         return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
 }
 
@@ -1030,20 +1059,31 @@ int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fa
         /* Don't do a WCC update if these attributes are already stale */
         if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
                         !nfs_inode_attrs_need_update(inode, fattr)) {
-                fattr->valid &= ~(NFS_ATTR_WCC_V4|NFS_ATTR_WCC);
+                fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
+                                | NFS_ATTR_FATTR_PRESIZE
+                                | NFS_ATTR_FATTR_PREMTIME
+                                | NFS_ATTR_FATTR_PRECTIME);
                 goto out_noforce;
         }
-        if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 &&
-                        (fattr->valid & NFS_ATTR_WCC_V4) == 0) {
+        if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
+                        (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
                 fattr->pre_change_attr = NFS_I(inode)->change_attr;
-                fattr->valid |= NFS_ATTR_WCC_V4;
+                fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
         }
-        if ((fattr->valid & NFS_ATTR_FATTR) != 0 &&
-                        (fattr->valid & NFS_ATTR_WCC) == 0) {
+        if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
+                        (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
                 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
+                fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
+        }
+        if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
+                        (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
                 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
+                fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
+        }
+        if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
+                        (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
                 fattr->pre_size = i_size_read(inode);
-                fattr->valid |= NFS_ATTR_WCC;
+                fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
         }
 out_noforce:
         status = nfs_post_op_update_inode_locked(inode, fattr);
@@ -1075,18 +1115,18 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
                         __func__, inode->i_sb->s_id, inode->i_ino,
                         atomic_read(&inode->i_count), fattr->valid);
 
-        if (nfsi->fileid != fattr->fileid)
+        if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
                 goto out_fileid;
 
         /*
          * Make sure the inode's type hasn't changed.
          */
-        if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
+        if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
                 goto out_changed;
 
         server = NFS_SERVER(inode);
         /* Update the fsid? */
-        if (S_ISDIR(inode->i_mode) &&
+        if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
                         !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
                         !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags))
                 server->fsid = fattr->fsid;
@@ -1096,14 +1136,27 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
          */
         nfsi->read_cache_jiffies = fattr->time_start;
 
-        nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ATIME
-                        | NFS_INO_REVAL_PAGECACHE);
+        if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) || (fattr->valid & (NFS_ATTR_FATTR_MTIME|NFS_ATTR_FATTR_CTIME)))
+            nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
+                    | NFS_INO_INVALID_ATIME
+                    | NFS_INO_REVAL_PAGECACHE);
 
         /* Do atomic weak cache consistency updates */
         nfs_wcc_update_inode(inode, fattr);
 
         /* More cache consistency checks */
-        if (!(fattr->valid & NFS_ATTR_FATTR_V4)) {
+        if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
+                if (nfsi->change_attr != fattr->change_attr) {
+                        dprintk("NFS: change_attr change on server for file %s/%ld\n",
+                                        inode->i_sb->s_id, inode->i_ino);
+                        invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
+                        if (S_ISDIR(inode->i_mode))
+                                nfs_force_lookup_revalidate(inode);
+                        nfsi->change_attr = fattr->change_attr;
+                }
+        }
+
+        if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
                 /* NFSv2/v3: Check if the mtime agrees */
                 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
                         dprintk("NFS: mtime change on server for file %s/%ld\n",
@@ -1111,7 +1164,10 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
                         invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
                         if (S_ISDIR(inode->i_mode))
                                 nfs_force_lookup_revalidate(inode);
+                        memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
                 }
+        }
+        if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
                 /* If ctime has changed we should definitely clear access+acl caches */
                 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
                         invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
@@ -1122,59 +1178,66 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
                                 invalid |= NFS_INO_INVALID_DATA;
                                 nfs_force_lookup_revalidate(inode);
                         }
+                        memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
                 }
-        } else if (nfsi->change_attr != fattr->change_attr) {
-                dprintk("NFS: change_attr change on server for file %s/%ld\n",
-                                inode->i_sb->s_id, inode->i_ino);
-                invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
-                if (S_ISDIR(inode->i_mode))
-                        nfs_force_lookup_revalidate(inode);
         }
 
         /* Check if our cached file size is stale */
-        new_isize = nfs_size_to_loff_t(fattr->size);
-        cur_isize = i_size_read(inode);
-        if (new_isize != cur_isize) {
-                /* Do we perhaps have any outstanding writes, or has
-                 * the file grown beyond our last write? */
-                if (nfsi->npages == 0 || new_isize > cur_isize) {
-                        i_size_write(inode, new_isize);
-                        invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
+        if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
+                new_isize = nfs_size_to_loff_t(fattr->size);
+                cur_isize = i_size_read(inode);
+                if (new_isize != cur_isize) {
+                        /* Do we perhaps have any outstanding writes, or has
+                         * the file grown beyond our last write? */
+                        if (nfsi->npages == 0 || new_isize > cur_isize) {
+                                i_size_write(inode, new_isize);
+                                invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
+                        }
+                        dprintk("NFS: isize change on server for file %s/%ld\n",
+                                        inode->i_sb->s_id, inode->i_ino);
                 }
-                dprintk("NFS: isize change on server for file %s/%ld\n",
-                                inode->i_sb->s_id, inode->i_ino);
         }
 
 
-        memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
-        memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
-        memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
-        nfsi->change_attr = fattr->change_attr;
+        if (fattr->valid & NFS_ATTR_FATTR_ATIME)
+                memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
 
-        if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) ||
-            inode->i_uid != fattr->uid ||
-            inode->i_gid != fattr->gid)
-                invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
-
-        if (inode->i_nlink != fattr->nlink) {
-                invalid |= NFS_INO_INVALID_ATTR;
-                if (S_ISDIR(inode->i_mode))
-                        invalid |= NFS_INO_INVALID_DATA;
+        if (fattr->valid & NFS_ATTR_FATTR_MODE) {
+                if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
+                        invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
+                        inode->i_mode = fattr->mode;
+                }
+        }
+        if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
+                if (inode->i_uid != fattr->uid) {
+                        invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
+                        inode->i_uid = fattr->uid;
+                }
+        }
+        if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
+                if (inode->i_gid != fattr->gid) {
+                        invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
+                        inode->i_gid = fattr->gid;
+                }
         }
 
-        inode->i_mode = fattr->mode;
-        inode->i_nlink = fattr->nlink;
-        inode->i_uid = fattr->uid;
-        inode->i_gid = fattr->gid;
+        if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
+                if (inode->i_nlink != fattr->nlink) {
+                        invalid |= NFS_INO_INVALID_ATTR;
+                        if (S_ISDIR(inode->i_mode))
+                                invalid |= NFS_INO_INVALID_DATA;
+                        inode->i_nlink = fattr->nlink;
+                }
+        }
 
-        if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) {
+        if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
                 /*
                  * report the blocks in 512byte units
                  */
                 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
-        } else {
-                inode->i_blocks = fattr->du.nfs2.blocks;
         }
+        if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
+                inode->i_blocks = fattr->du.nfs2.blocks;
 
         /* Update attrtimeo value if we're out of the unstable period */
         if (invalid & NFS_INO_INVALID_ATTR) {