Attachment 10501 Details for Bug 10982 – Back-port of master fix for 4.0.next.

[patch] Back-port of master fix for 4.0.next.

bug-10982-v4-0 (text/plain), 7.46 KB, created by Jeremy Allison on 2014-12-08 04:14:58 UTC

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Creator: Jeremy Allison

Created: 2014-12-08 04:14:58 UTC

Size: 7.46 KB

patch

obsolete

>From 54547f0994fcc474232d7c17b1d1ce60d1c7370e Mon Sep 17 00:00:00 2001
>From: Jeremy Allison <jra@samba.org>
>Date: Fri, 5 Dec 2014 15:31:19 -0800
>Subject: [PATCH 1/3] s3: smbd: Fix *allocate* calls to follow POSIX error
> return convention.
>
>vfswrap_fallocate() is broken in that it can call posix_fallocate()
>which returns an int error (and doesn't set errno) but can also
>call Linux fallocate() which returns -1 and sets errno.
>
>Standardize on the -1,errno convention.
>
>Reported by Jones <jones.kstw@gmail.com> who provided the
>initial patch. This patch tested and confirmed working
>by him as well.
>
>https://bugzilla.samba.org/show_bug.cgi?id=10982
>
>Signed-off-by: Jeremy Allison <jra@samba.org>
>Reviewed-by: David Disseldorp <ddiss@suse.de>
>(cherry picked from commit c9235deee0fc49c99cfaf2329b7af526d9dd12d0)
>---
> source3/modules/vfs_default.c | 17 ++++++++++++-----
> 1 file changed, 12 insertions(+), 5 deletions(-)
>
>diff --git a/source3/modules/vfs_default.c b/source3/modules/vfs_default.c
>index b31f4be..429fca1 100644
>--- a/source3/modules/vfs_default.c
>+++ b/source3/modules/vfs_default.c
>@@ -1644,15 +1644,14 @@ static int strict_allocate_ftruncate(vfs_handle_struct *handle, files_struct *fs
> 	   return ENOTSUP or EINVAL in cases like that. */
> 	ret = SMB_VFS_FALLOCATE(fsp, VFS_FALLOCATE_EXTEND_SIZE,
> 				pst->st_ex_size, space_to_write);
>-	if (ret == ENOSPC) {
>-		errno = ENOSPC;
>+	if (ret == -1 && errno == ENOSPC) {
> 		return -1;
> 	}
> 	if (ret == 0) {
> 		return 0;
> 	}
> 	DEBUG(10,("strict_allocate_ftruncate: SMB_VFS_FALLOCATE failed with "
>-		"error %d. Falling back to slow manual allocation\n", ret));
>+		"error %d. Falling back to slow manual allocation\n", errno));
> 
> 	/* available disk space is enough or not? */
> 	space_avail = get_dfree_info(fsp->conn,
>@@ -1668,8 +1667,7 @@ static int strict_allocate_ftruncate(vfs_handle_struct *handle, files_struct *fs
> 	/* Write out the real space on disk. */
> 	ret = vfs_slow_fallocate(fsp, pst->st_ex_size, space_to_write);
> 	if (ret != 0) {
>-		errno = ret;
>-		ret = -1;
>+		return -1;
> 	}
> 
> 	return 0;
>@@ -1754,6 +1752,15 @@ static int vfswrap_fallocate(vfs_handle_struct *handle,
> 	START_PROFILE(syscall_fallocate);
> 	if (mode == VFS_FALLOCATE_EXTEND_SIZE) {
> 		result = sys_posix_fallocate(fsp->fh->fd, offset, len);
>+		/*
>+		 * posix_fallocate returns 0 on success, errno on error
>+		 * and doesn't set errno. Make it behave like fallocate()
>+		 * which returns -1, and sets errno on failure.
>+		 */
>+		if (result != 0) {
>+			errno = result;
>+			result = -1;
>+		}
> 	} else if (mode == VFS_FALLOCATE_KEEP_SIZE) {
> 		result = sys_fallocate(fsp->fh->fd, mode, offset, len);
> 	} else {
>-- 
>1.9.1
>
>
>From b7e37e08f90db546c228a95c144bc6a7f1e78191 Mon Sep 17 00:00:00 2001
>From: Jeremy Allison <jra@samba.org>
>Date: Fri, 5 Dec 2014 15:34:12 -0800
>Subject: [PATCH 2/3] s3: smbd: Fix *allocate* calls to follow POSIX error
> return convention.
>
>Fix vfs_allocate_file_space(), vfs_slow_fallocate(),
>vfs_fill_sparse() to follow the -1,errno convention
>for errors.
>
>Standardize on the -1,errno convention.
>
>Reported by Jones <jones.kstw@gmail.com> who provided the
>initial patch. This patch tested and confirmed working
>by him as well.
>
>https://bugzilla.samba.org/show_bug.cgi?id=10982
>
>Signed-off-by: Jeremy Allison <jra@samba.org>
>Reviewed-by: David Disseldorp <ddiss@suse.de>
>(cherry picked from commit cc1f91cec627cb3e4fc89b96aae1e7e4c539cd1c)
>---
> source3/smbd/vfs.c | 22 +++++++++++-----------
> 1 file changed, 11 insertions(+), 11 deletions(-)
>
>diff --git a/source3/smbd/vfs.c b/source3/smbd/vfs.c
>index 124981c..63758ac 100644
>--- a/source3/smbd/vfs.c
>+++ b/source3/smbd/vfs.c
>@@ -580,6 +580,10 @@ int vfs_allocate_file_space(files_struct *fsp, uint64_t len)
> 		return 0;
> 	}
> 
>+	if (ret == -1 && errno == ENOSPC) {
>+		return -1;
>+	}
>+
> 	len -= fsp->fsp_name->st.st_ex_size;
> 	len /= 1024; /* Len is now number of 1k blocks needed. */
> 	space_avail = get_dfree_info(conn, fsp->fsp_name->base_name, false,
>@@ -634,7 +638,7 @@ int vfs_set_filelen(files_struct *fsp, off_t len)
>  fails. Needs to be outside of the default version of SMB_VFS_FALLOCATE
>  as this is also called from the default SMB_VFS_FTRUNCATE code.
>  Always extends the file size.
>- Returns 0 on success, errno on failure.
>+ Returns 0 on success, -1 on failure.
> ****************************************************************************/
> 
> #define SPARSE_BUF_WRITE_SIZE (32*1024)
>@@ -648,7 +652,7 @@ int vfs_slow_fallocate(files_struct *fsp, off_t offset, off_t len)
> 		sparse_buf = SMB_CALLOC_ARRAY(char, SPARSE_BUF_WRITE_SIZE);
> 		if (!sparse_buf) {
> 			errno = ENOMEM;
>-			return ENOMEM;
>+			return -1;
> 		}
> 	}
> 
>@@ -657,10 +661,12 @@ int vfs_slow_fallocate(files_struct *fsp, off_t offset, off_t len)
> 
> 		pwrite_ret = SMB_VFS_PWRITE(fsp, sparse_buf, curr_write_size, offset + total);
> 		if (pwrite_ret == -1) {
>+			int saved_errno = errno;
> 			DEBUG(10,("vfs_slow_fallocate: SMB_VFS_PWRITE for file "
> 				  "%s failed with error %s\n",
>-				  fsp_str_dbg(fsp), strerror(errno)));
>-			return errno;
>+				  fsp_str_dbg(fsp), strerror(saved_errno)));
>+			errno = saved_errno;
>+			return -1;
> 		}
> 		total += pwrite_ret;
> 	}
>@@ -718,9 +724,7 @@ int vfs_fill_sparse(files_struct *fsp, off_t len)
> 		 * return ENOTSUP or EINVAL in cases like that. */
> 		ret = SMB_VFS_FALLOCATE(fsp, VFS_FALLOCATE_EXTEND_SIZE,
> 				offset, num_to_write);
>-		if (ret == ENOSPC) {
>-			errno = ENOSPC;
>-			ret = -1;
>+		if (ret == -1 && errno == ENOSPC) {
> 			goto out;
> 		}
> 		if (ret == 0) {
>@@ -731,10 +735,6 @@ int vfs_fill_sparse(files_struct *fsp, off_t len)
> 	}
> 
> 	ret = vfs_slow_fallocate(fsp, offset, num_to_write);
>-	if (ret != 0) {
>-		errno = ret;
>-		ret = -1;
>-	}
> 
>  out:
> 
>-- 
>1.9.1
>
>
>From 14c8d672d7e3dc8d32660adc9f2ec2d6d78ae54e Mon Sep 17 00:00:00 2001
>From: Jeremy Allison <jra@samba.org>
>Date: Sun, 7 Dec 2014 19:50:54 -0800
>Subject: [PATCH 3/3] s3: modules: Fix *allocate* calls to follow POSIX error
> return convention.
>
>Fix up the time_audit and streams_xattr modules to follow
>the -1,errno convention for errors.
>
>Reported by Jones <jones.kstw@gmail.com> who provided the
>initial patch. This patch tested and confirmed working
>by him as well.
>
>Signed-off-by: Jeremy Allison <jra@samba.org>
>---
> source3/modules/vfs_streams_xattr.c | 5 +++--
> source3/modules/vfs_time_audit.c    | 8 +++++++-
> 2 files changed, 10 insertions(+), 3 deletions(-)
>
>diff --git a/source3/modules/vfs_streams_xattr.c b/source3/modules/vfs_streams_xattr.c
>index c4d86ee..625e995 100644
>--- a/source3/modules/vfs_streams_xattr.c
>+++ b/source3/modules/vfs_streams_xattr.c
>@@ -1027,11 +1027,12 @@ static int streams_xattr_fallocate(struct vfs_handle_struct *handle,
> 	}
> 
> 	if (!streams_xattr_recheck(sio)) {
>-		return errno;
>+		return -1;
> 	}
> 
> 	/* Let the pwrite code path handle it. */
>-	return ENOSYS;
>+	errno = ENOSYS;
>+	return -1;
> }
> 
> 
>diff --git a/source3/modules/vfs_time_audit.c b/source3/modules/vfs_time_audit.c
>index 95b4148..4b9aef0 100644
>--- a/source3/modules/vfs_time_audit.c
>+++ b/source3/modules/vfs_time_audit.c
>@@ -1210,18 +1210,24 @@ static int smb_time_audit_fallocate(vfs_handle_struct *handle,
> 				    off_t len)
> {
> 	int result;
>+	int saved_errno = 0;
> 	struct timespec ts1,ts2;
> 	double timediff;
> 
> 	clock_gettime_mono(&ts1);
> 	result = SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
>+	if (result == -1) {
>+		saved_errno = errno;
>+	}
> 	clock_gettime_mono(&ts2);
> 	timediff = nsec_time_diff(&ts2,&ts1)*1.0e-9;
> 
> 	if (timediff > audit_timeout) {
> 		smb_time_audit_log_fsp("fallocate", timediff, fsp);
> 	}
>-
>+	if (result == -1) {
>+		errno = saved_errno;
>+	}
> 	return result;
> }
> 
>-- 
>1.9.1
>

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