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Commit 505d5c11 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'nfs-for-4.13-2' of git://git.linux-nfs.org/projects/anna/linux-nfs 

Pull NFS client bugfixes from Anna Schumaker:
 "Stable bugfix:
   - Fix error reporting regression

  Bugfixes:
   - Fix setting filelayout ds address race
   - Fix subtle access bug when using ACLs
   - Fix setting mnt3_counts array size
   - Fix a couple of pNFS commit races"

* tag 'nfs-for-4.13-2' of git://git.linux-nfs.org/projects/anna/linux-nfs:
  NFS/filelayout: Fix racy setting of fl->dsaddr in filelayout_check_deviceid()
  NFS: Be more careful about mapping file permissions
  NFS: Store the raw NFS access mask in the inode's access cache
  NFSv3: Convert nfs3_proc_access() to use nfs_access_set_mask()
  NFS: Refactor NFS access to kernel access mask calculation
  net/sunrpc/xprt_sock: fix regression in connection error reporting.
  nfs: count correct array for mnt3_counts array size
  Revert commit 722f0b89 ("pNFS: Don't send COMMITs to the DSes if...")
  pNFS/flexfiles: Handle expired layout segments in ff_layout_initiate_commit()
  NFS: Fix another COMMIT race in pNFS
  NFS: Fix a COMMIT race in pNFS
  mount: copy the port field into the cloned nfs_server structure.
  NFS: Don't run wake_up_bit() when nobody is waiting...
  nfs: add export operations
parents 99313414 1ebf9801

fs/nfs/client.c

+1 −0
Original line number Diff line number Diff line
@@ -820,6 +820,7 @@ void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *sour 
	target->caps = source->caps;

	target->options = source->options;

	target->auth_info = source->auth_info;

	target->port = source->port;

}

EXPORT_SYMBOL_GPL(nfs_server_copy_userdata);

fs/nfs/dir.c

+37 −10
Original line number Diff line number Diff line
@@ -2372,16 +2372,40 @@ void nfs_access_add_cache(struct inode *inode, struct nfs_access_entry *set) 
}

EXPORT_SYMBOL_GPL(nfs_access_add_cache);



#define NFS_MAY_READ (NFS4_ACCESS_READ)

#define NFS_MAY_WRITE (NFS4_ACCESS_MODIFY | \

		NFS4_ACCESS_EXTEND | \

		NFS4_ACCESS_DELETE)

#define NFS_FILE_MAY_WRITE (NFS4_ACCESS_MODIFY | \

		NFS4_ACCESS_EXTEND)

#define NFS_DIR_MAY_WRITE NFS_MAY_WRITE

#define NFS_MAY_LOOKUP (NFS4_ACCESS_LOOKUP)

#define NFS_MAY_EXECUTE (NFS4_ACCESS_EXECUTE)

static int

nfs_access_calc_mask(u32 access_result, umode_t umode)

{

	int mask = 0;



	if (access_result & NFS_MAY_READ)

		mask |= MAY_READ;

	if (S_ISDIR(umode)) {

		if ((access_result & NFS_DIR_MAY_WRITE) == NFS_DIR_MAY_WRITE)

			mask |= MAY_WRITE;

		if ((access_result & NFS_MAY_LOOKUP) == NFS_MAY_LOOKUP)

			mask |= MAY_EXEC;

	} else if (S_ISREG(umode)) {

		if ((access_result & NFS_FILE_MAY_WRITE) == NFS_FILE_MAY_WRITE)

			mask |= MAY_WRITE;

		if ((access_result & NFS_MAY_EXECUTE) == NFS_MAY_EXECUTE)

			mask |= MAY_EXEC;

	} else if (access_result & NFS_MAY_WRITE)

			mask |= MAY_WRITE;

	return mask;

}



void nfs_access_set_mask(struct nfs_access_entry *entry, u32 access_result)

{

	entry->mask = 0;

	if (access_result & NFS4_ACCESS_READ)

		entry->mask |= MAY_READ;

	if (access_result &

	    (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))

		entry->mask |= MAY_WRITE;

	if (access_result & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))

		entry->mask |= MAY_EXEC;

	entry->mask = access_result;

}

EXPORT_SYMBOL_GPL(nfs_access_set_mask);
@@ -2389,6 +2413,7 @@ static int nfs_do_access(struct inode *inode, struct rpc_cred *cred, int mask) 
{

	struct nfs_access_entry cache;

	bool may_block = (mask & MAY_NOT_BLOCK) == 0;

	int cache_mask;

	int status;



	trace_nfs_access_enter(inode);
@@ -2404,7 +2429,8 @@ static int nfs_do_access(struct inode *inode, struct rpc_cred *cred, int mask) 
		goto out;



	/* Be clever: ask server to check for all possible rights */

	cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;

	cache.mask = NFS_MAY_LOOKUP | NFS_MAY_EXECUTE

		     | NFS_MAY_WRITE | NFS_MAY_READ;

	cache.cred = cred;

	cache.jiffies = jiffies;

	status = NFS_PROTO(inode)->access(inode, &cache);
@@ -2418,7 +2444,8 @@ static int nfs_do_access(struct inode *inode, struct rpc_cred *cred, int mask) 
	}

	nfs_access_add_cache(inode, &cache);

out_cached:

	if ((mask & ~cache.mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) != 0)

	cache_mask = nfs_access_calc_mask(cache.mask, inode->i_mode);

	if ((mask & ~cache_mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) != 0)

		status = -EACCES;

out:

	trace_nfs_access_exit(inode, status);

fs/nfs/filelayout/filelayout.c

+11 −2
Original line number Diff line number Diff line
@@ -542,6 +542,10 @@ filelayout_check_deviceid(struct pnfs_layout_hdr *lo, 
	struct nfs4_file_layout_dsaddr *dsaddr;

	int status = -EINVAL;



	/* Is the deviceid already set? If so, we're good. */

	if (fl->dsaddr != NULL)

		return 0;



	/* find and reference the deviceid */

	d = nfs4_find_get_deviceid(NFS_SERVER(lo->plh_inode), &fl->deviceid,

			lo->plh_lc_cred, gfp_flags);
@@ -553,8 +557,6 @@ filelayout_check_deviceid(struct pnfs_layout_hdr *lo, 
	if (filelayout_test_devid_unavailable(&dsaddr->id_node))

		goto out_put;



	fl->dsaddr = dsaddr;



	if (fl->first_stripe_index >= dsaddr->stripe_count) {

		dprintk("%s Bad first_stripe_index %u\n",

				__func__, fl->first_stripe_index);
@@ -570,6 +572,13 @@ filelayout_check_deviceid(struct pnfs_layout_hdr *lo, 
		goto out_put;

	}

	status = 0;



	/*

	 * Atomic compare and xchange to ensure we don't scribble

	 * over a non-NULL pointer.

	 */

	if (cmpxchg(&fl->dsaddr, NULL, dsaddr) != NULL)

		goto out_put;

out:

	return status;

out_put:

fs/nfs/flexfilelayout/flexfilelayout.c

+4 −0
Original line number Diff line number Diff line
@@ -1842,6 +1842,10 @@ static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how) 
	int vers, ret;

	struct nfs_fh *fh;



	if (!lseg || !(pnfs_is_valid_lseg(lseg) ||

	    test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)))

		goto out_err;



	idx = calc_ds_index_from_commit(lseg, data->ds_commit_index);

	ds = nfs4_ff_layout_prepare_ds(lseg, idx, true);

	if (!ds)

fs/nfs/mount_clnt.c

+1 −1
Original line number Diff line number Diff line
@@ -512,7 +512,7 @@ static const struct rpc_version mnt_version1 = { 
	.counts		= mnt_counts,

};



static unsigned int mnt3_counts[ARRAY_SIZE(mnt_procedures)];

static unsigned int mnt3_counts[ARRAY_SIZE(mnt3_procedures)];

static const struct rpc_version mnt_version3 = {

	.number		= 3,

	.nrprocs	= ARRAY_SIZE(mnt3_procedures),