From aea93397db4b39c9d15443a0e7cc9a380ba990c6 Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Sun, 10 Apr 2011 10:35:12 -0400 Subject: nfsd: distinguish functions of NFSD_MAY_* flags Most of the NFSD_MAY_* flags actually request permissions, but over the years we've accreted a few that modify the behavior of the permission or open code in other ways. Distinguish the two cases a little more. In particular, allow the shortcut at the start of nfsd_permission to ignore the non-permission-requesting bits. Signed-off-by: J. Bruce Fields --- fs/nfsd/vfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/nfsd/vfs.c') diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 2e1cebde90df..a76ef7e0b3d0 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -2027,7 +2027,7 @@ nfsd_permission(struct svc_rqst *rqstp, struct svc_export *exp, struct inode *inode = dentry->d_inode; int err; - if (acc == NFSD_MAY_NOP) + if ((acc & NFSD_MAY_MASK) == NFSD_MAY_NOP) return 0; #if 0 dprintk("nfsd: permission 0x%x%s%s%s%s%s%s%s mode 0%o%s%s%s\n", -- cgit v1.2.3 From 29a78a3ed7fc9c4ee49962751eb321b038c190a2 Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Sat, 9 Apr 2011 11:28:53 -0400 Subject: nfsd4: make fh_verify responsibility of nfsd_lookup_dentry caller The secinfo caller actually won't want this. Signed-off-by: J. Bruce Fields --- fs/nfsd/vfs.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) (limited to 'fs/nfsd/vfs.c') diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index a76ef7e0b3d0..e53313972c30 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -181,16 +181,10 @@ nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp, struct svc_export *exp; struct dentry *dparent; struct dentry *dentry; - __be32 err; int host_err; dprintk("nfsd: nfsd_lookup(fh %s, %.*s)\n", SVCFH_fmt(fhp), len,name); - /* Obtain dentry and export. */ - err = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC); - if (err) - return err; - dparent = fhp->fh_dentry; exp = fhp->fh_export; exp_get(exp); @@ -254,6 +248,9 @@ nfsd_lookup(struct svc_rqst *rqstp, struct svc_fh *fhp, const char *name, struct dentry *dentry; __be32 err; + err = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC); + if (err) + return err; err = nfsd_lookup_dentry(rqstp, fhp, name, len, &exp, &dentry); if (err) return err; -- cgit v1.2.3 From ac6721a13e5b1a90728e790600f827a5e5f5da2f Mon Sep 17 00:00:00 2001 From: Mi Jinlong Date: Wed, 20 Apr 2011 17:06:25 +0800 Subject: nfsd41: make sure nfs server process OPEN with EXCLUSIVE4_1 correctly The NFS server uses nfsd_create_v3 to handle EXCLUSIVE4_1 opens, but that function is not prepared to handle them. Rename nfsd_create_v3() to do_nfsd_create(), and add handling of EXCLUSIVE4_1. Signed-off-by: Mi Jinlong Signed-off-by: J. Bruce Fields --- fs/nfsd/vfs.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) (limited to 'fs/nfsd/vfs.c') diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index e53313972c30..389e45ad200b 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1337,11 +1337,18 @@ out_nfserr: } #ifdef CONFIG_NFSD_V3 + +static inline int nfsd_create_is_exclusive(int createmode) +{ + return createmode == NFS3_CREATE_EXCLUSIVE + || createmode == NFS4_CREATE_EXCLUSIVE4_1; +} + /* - * NFSv3 version of nfsd_create + * NFSv3 and NFSv4 version of nfsd_create */ __be32 -nfsd_create_v3(struct svc_rqst *rqstp, struct svc_fh *fhp, +do_nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp, char *fname, int flen, struct iattr *iap, struct svc_fh *resfhp, int createmode, u32 *verifier, int *truncp, int *created) @@ -1386,7 +1393,7 @@ nfsd_create_v3(struct svc_rqst *rqstp, struct svc_fh *fhp, if (err) goto out; - if (createmode == NFS3_CREATE_EXCLUSIVE) { + if (nfsd_create_is_exclusive(createmode)) { /* solaris7 gets confused (bugid 4218508) if these have * the high bit set, so just clear the high bits. If this is * ever changed to use different attrs for storing the @@ -1427,6 +1434,11 @@ nfsd_create_v3(struct svc_rqst *rqstp, struct svc_fh *fhp, && dchild->d_inode->i_atime.tv_sec == v_atime && dchild->d_inode->i_size == 0 ) break; + case NFS4_CREATE_EXCLUSIVE4_1: + if ( dchild->d_inode->i_mtime.tv_sec == v_mtime + && dchild->d_inode->i_atime.tv_sec == v_atime + && dchild->d_inode->i_size == 0 ) + goto set_attr; /* fallthru */ case NFS3_CREATE_GUARDED: err = nfserr_exist; @@ -1445,7 +1457,7 @@ nfsd_create_v3(struct svc_rqst *rqstp, struct svc_fh *fhp, nfsd_check_ignore_resizing(iap); - if (createmode == NFS3_CREATE_EXCLUSIVE) { + if (nfsd_create_is_exclusive(createmode)) { /* Cram the verifier into atime/mtime */ iap->ia_valid = ATTR_MTIME|ATTR_ATIME | ATTR_MTIME_SET|ATTR_ATIME_SET; -- cgit v1.2.3 From fccb13c947de83a368e1f3c2216bbf4d8d41efa1 Mon Sep 17 00:00:00 2001 From: Bryan Schumaker Date: Wed, 27 Apr 2011 15:47:14 -0400 Subject: NFSD: Remove setting unused variable in nfsd_vfs_read() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Compiling gave me this warning: fs/nfsd/vfs.c: In function ‘nfsd_vfs_read’: fs/nfsd/vfs.c:880:16: warning: variable ‘inode’ set but not used [-Wunused-but-set-variable] I discovered that a local variable "inode" was being set towards the beginning of nfsd_vfs_read() and then ignored for the rest of the function. Signed-off-by: Bryan Schumaker Signed-off-by: J. Bruce Fields --- fs/nfsd/vfs.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'fs/nfsd/vfs.c') diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 389e45ad200b..f4e056ae53e4 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -874,13 +874,11 @@ static __be32 nfsd_vfs_read(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file, loff_t offset, struct kvec *vec, int vlen, unsigned long *count) { - struct inode *inode; mm_segment_t oldfs; __be32 err; int host_err; err = nfserr_perm; - inode = file->f_path.dentry->d_inode; if (file->f_op->splice_read && rqstp->rq_splice_ok) { struct splice_desc sd = { -- cgit v1.2.3