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Diffstat (limited to 'fs/cifs/inode.c')
-rw-r--r--fs/cifs/inode.c86
1 files changed, 80 insertions, 6 deletions
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 3f5bc83dc3d..f414526e476 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -90,6 +90,9 @@ int cifs_get_inode_info_unix(struct inode **pinode,
(*pinode)->i_ino =
(unsigned long)findData.UniqueId;
} /* note ino incremented to unique num in new_inode */
+ if(sb->s_flags & MS_NOATIME)
+ (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
+
insert_inode_hash(*pinode);
}
@@ -140,10 +143,10 @@ int cifs_get_inode_info_unix(struct inode **pinode,
inode->i_gid = le64_to_cpu(findData.Gid);
inode->i_nlink = le64_to_cpu(findData.Nlinks);
+ spin_lock(&inode->i_lock);
if (is_size_safe_to_change(cifsInfo, end_of_file)) {
/* can not safely change the file size here if the
client is writing to it due to potential races */
-
i_size_write(inode, end_of_file);
/* blksize needs to be multiple of two. So safer to default to
@@ -159,6 +162,7 @@ int cifs_get_inode_info_unix(struct inode **pinode,
/* for this calculation */
inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
}
+ spin_unlock(&inode->i_lock);
if (num_of_bytes < end_of_file)
cFYI(1, ("allocation size less than end of file"));
@@ -421,6 +425,8 @@ int cifs_get_inode_info(struct inode **pinode,
} else /* do we need cast or hash to ino? */
(*pinode)->i_ino = inode_num;
} /* else ino incremented to unique num in new_inode*/
+ if(sb->s_flags & MS_NOATIME)
+ (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
insert_inode_hash(*pinode);
}
inode = *pinode;
@@ -488,9 +494,17 @@ int cifs_get_inode_info(struct inode **pinode,
mode e.g. 555 */
if (cifsInfo->cifsAttrs & ATTR_READONLY)
inode->i_mode &= ~(S_IWUGO);
+ else if ((inode->i_mode & S_IWUGO) == 0)
+ /* the ATTR_READONLY flag may have been */
+ /* changed on server -- set any w bits */
+ /* allowed by mnt_file_mode */
+ inode->i_mode |= (S_IWUGO &
+ cifs_sb->mnt_file_mode);
/* BB add code here -
validate if device or weird share or device type? */
}
+
+ spin_lock(&inode->i_lock);
if (is_size_safe_to_change(cifsInfo, le64_to_cpu(pfindData->EndOfFile))) {
/* can not safely shrink the file size here if the
client is writing to it due to potential races */
@@ -501,6 +515,7 @@ int cifs_get_inode_info(struct inode **pinode,
inode->i_blocks = (512 - 1 + le64_to_cpu(
pfindData->AllocationSize)) >> 9;
}
+ spin_unlock(&inode->i_lock);
inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
@@ -829,8 +844,10 @@ int cifs_rmdir(struct inode *inode, struct dentry *direntry)
if (!rc) {
drop_nlink(inode);
+ spin_lock(&direntry->d_inode->i_lock);
i_size_write(direntry->d_inode,0);
clear_nlink(direntry->d_inode);
+ spin_unlock(&direntry->d_inode->i_lock);
}
cifsInode = CIFS_I(direntry->d_inode);
@@ -1123,6 +1140,52 @@ static int cifs_truncate_page(struct address_space *mapping, loff_t from)
return rc;
}
+static int cifs_vmtruncate(struct inode * inode, loff_t offset)
+{
+ struct address_space *mapping = inode->i_mapping;
+ unsigned long limit;
+
+ spin_lock(&inode->i_lock);
+ if (inode->i_size < offset)
+ goto do_expand;
+ /*
+ * truncation of in-use swapfiles is disallowed - it would cause
+ * subsequent swapout to scribble on the now-freed blocks.
+ */
+ if (IS_SWAPFILE(inode)) {
+ spin_unlock(&inode->i_lock);
+ goto out_busy;
+ }
+ i_size_write(inode, offset);
+ spin_unlock(&inode->i_lock);
+ unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
+ truncate_inode_pages(mapping, offset);
+ goto out_truncate;
+
+do_expand:
+ limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
+ if (limit != RLIM_INFINITY && offset > limit) {
+ spin_unlock(&inode->i_lock);
+ goto out_sig;
+ }
+ if (offset > inode->i_sb->s_maxbytes) {
+ spin_unlock(&inode->i_lock);
+ goto out_big;
+ }
+ i_size_write(inode, offset);
+ spin_unlock(&inode->i_lock);
+out_truncate:
+ if (inode->i_op && inode->i_op->truncate)
+ inode->i_op->truncate(inode);
+ return 0;
+out_sig:
+ send_sig(SIGXFSZ, current, 0);
+out_big:
+ return -EFBIG;
+out_busy:
+ return -ETXTBSY;
+}
+
int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
{
int xid;
@@ -1133,6 +1196,7 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
struct cifsFileInfo *open_file = NULL;
FILE_BASIC_INFO time_buf;
int set_time = FALSE;
+ int set_dosattr = FALSE;
__u64 mode = 0xFFFFFFFFFFFFFFFFULL;
__u64 uid = 0xFFFFFFFFFFFFFFFFULL;
__u64 gid = 0xFFFFFFFFFFFFFFFFULL;
@@ -1239,7 +1303,7 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
*/
if (rc == 0) {
- rc = vmtruncate(direntry->d_inode, attrs->ia_size);
+ rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
cifs_truncate_page(direntry->d_inode->i_mapping,
direntry->d_inode->i_size);
} else
@@ -1269,15 +1333,23 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
else if (attrs->ia_valid & ATTR_MODE) {
rc = 0;
if ((mode & S_IWUGO) == 0) /* not writeable */ {
- if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
+ if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
+ set_dosattr = TRUE;
time_buf.Attributes =
cpu_to_le32(cifsInode->cifsAttrs |
ATTR_READONLY);
+ }
} else if ((mode & S_IWUGO) == S_IWUGO) {
- if (cifsInode->cifsAttrs & ATTR_READONLY)
+ if (cifsInode->cifsAttrs & ATTR_READONLY) {
+ set_dosattr = TRUE;
time_buf.Attributes =
cpu_to_le32(cifsInode->cifsAttrs &
(~ATTR_READONLY));
+ /* Windows ignores set to zero */
+ if(time_buf.Attributes == 0)
+ time_buf.Attributes |=
+ cpu_to_le32(ATTR_NORMAL);
+ }
}
/* BB to be implemented -
via Windows security descriptors or streams */
@@ -1315,7 +1387,7 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
} else
time_buf.ChangeTime = 0;
- if (set_time || time_buf.Attributes) {
+ if (set_time || set_dosattr) {
time_buf.CreationTime = 0; /* do not change */
/* In the future we should experiment - try setting timestamps
via Handle (SetFileInfo) instead of by path */
@@ -1359,7 +1431,7 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
and this check ensures that we are not being called from
sys_utimes in which case we ought to fail the call back to
the user when the server rejects the call */
- if((rc) && (attrs->ia_valid &&
+ if((rc) && (attrs->ia_valid &
(ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
rc = 0;
}
@@ -1374,9 +1446,11 @@ cifs_setattr_exit:
return rc;
}
+#if 0
void cifs_delete_inode(struct inode *inode)
{
cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
/* may have to add back in if and when safe distributed caching of
directories added e.g. via FindNotify */
}
+#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-25 20:45:06 +0000