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Diffstat (limited to 'fs/cifs/xattr.c')
-rw-r--r--fs/cifs/xattr.c239
1 files changed, 138 insertions, 101 deletions
diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c
index a264b744bb4..5ac836a86b1 100644
--- a/fs/cifs/xattr.c
+++ b/fs/cifs/xattr.c
@@ -22,6 +22,7 @@
#include <linux/fs.h>
#include <linux/posix_acl_xattr.h>
#include <linux/slab.h>
+#include <linux/xattr.h>
#include "cifsfs.h"
#include "cifspdu.h"
#include "cifsglob.h"
@@ -30,25 +31,18 @@
#define MAX_EA_VALUE_SIZE 65535
#define CIFS_XATTR_DOS_ATTRIB "user.DosAttrib"
-#define CIFS_XATTR_USER_PREFIX "user."
-#define CIFS_XATTR_SYSTEM_PREFIX "system."
-#define CIFS_XATTR_OS2_PREFIX "os2."
-#define CIFS_XATTR_SECURITY_PREFIX ".security"
-#define CIFS_XATTR_TRUSTED_PREFIX "trusted."
-#define XATTR_TRUSTED_PREFIX_LEN 8
-#define XATTR_SECURITY_PREFIX_LEN 9
-/* BB need to add server (Samba e.g) support for security and trusted prefix */
-
+#define CIFS_XATTR_CIFS_ACL "system.cifs_acl"
+/* BB need to add server (Samba e.g) support for security and trusted prefix */
int cifs_removexattr(struct dentry *direntry, const char *ea_name)
{
int rc = -EOPNOTSUPP;
#ifdef CONFIG_CIFS_XATTR
- int xid;
+ unsigned int xid;
struct cifs_sb_info *cifs_sb;
struct tcon_link *tlink;
- struct cifsTconInfo *pTcon;
+ struct cifs_tcon *pTcon;
struct super_block *sb;
char *full_path = NULL;
@@ -66,7 +60,7 @@ int cifs_removexattr(struct dentry *direntry, const char *ea_name)
return PTR_ERR(tlink);
pTcon = tlink_tcon(tlink);
- xid = GetXid();
+ xid = get_xid();
full_path = build_path_from_dentry(direntry);
if (full_path == NULL) {
@@ -74,12 +68,12 @@ int cifs_removexattr(struct dentry *direntry, const char *ea_name)
goto remove_ea_exit;
}
if (ea_name == NULL) {
- cFYI(1, "Null xattr names not supported");
- } else if (strncmp(ea_name, CIFS_XATTR_USER_PREFIX, 5)
- && (strncmp(ea_name, CIFS_XATTR_OS2_PREFIX, 4))) {
- cFYI(1,
- "illegal xattr request %s (only user namespace supported)",
- ea_name);
+ cifs_dbg(FYI, "Null xattr names not supported\n");
+ } else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
+ && (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN))) {
+ cifs_dbg(FYI,
+ "illegal xattr request %s (only user namespace supported)\n",
+ ea_name);
/* BB what if no namespace prefix? */
/* Should we just pass them to server, except for
system and perhaps security prefixes? */
@@ -87,14 +81,16 @@ int cifs_removexattr(struct dentry *direntry, const char *ea_name)
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
goto remove_ea_exit;
- ea_name += 5; /* skip past user. prefix */
- rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, NULL,
- (__u16)0, cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+ ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
+ if (pTcon->ses->server->ops->set_EA)
+ rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
+ full_path, ea_name, NULL, (__u16)0,
+ cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
}
remove_ea_exit:
kfree(full_path);
- FreeXid(xid);
+ free_xid(xid);
cifs_put_tlink(tlink);
#endif
return rc;
@@ -105,10 +101,10 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name,
{
int rc = -EOPNOTSUPP;
#ifdef CONFIG_CIFS_XATTR
- int xid;
+ unsigned int xid;
struct cifs_sb_info *cifs_sb;
struct tcon_link *tlink;
- struct cifsTconInfo *pTcon;
+ struct cifs_tcon *pTcon;
struct super_block *sb;
char *full_path;
@@ -126,7 +122,7 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name,
return PTR_ERR(tlink);
pTcon = tlink_tcon(tlink);
- xid = GetXid();
+ xid = get_xid();
full_path = build_path_from_dentry(direntry);
if (full_path == NULL) {
@@ -140,31 +136,59 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name,
search server for EAs or streams to
returns as xattrs */
if (value_size > MAX_EA_VALUE_SIZE) {
- cFYI(1, "size of EA value too large");
+ cifs_dbg(FYI, "size of EA value too large\n");
rc = -EOPNOTSUPP;
goto set_ea_exit;
}
if (ea_name == NULL) {
- cFYI(1, "Null xattr names not supported");
- } else if (strncmp(ea_name, CIFS_XATTR_USER_PREFIX, 5) == 0) {
+ cifs_dbg(FYI, "Null xattr names not supported\n");
+ } else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
+ == 0) {
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
goto set_ea_exit;
if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0)
- cFYI(1, "attempt to set cifs inode metadata");
+ cifs_dbg(FYI, "attempt to set cifs inode metadata\n");
- ea_name += 5; /* skip past user. prefix */
- rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, ea_value,
- (__u16)value_size, cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
- } else if (strncmp(ea_name, CIFS_XATTR_OS2_PREFIX, 4) == 0) {
+ ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
+ if (pTcon->ses->server->ops->set_EA)
+ rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
+ full_path, ea_name, ea_value, (__u16)value_size,
+ cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
+ } else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN)
+ == 0) {
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
goto set_ea_exit;
- ea_name += 4; /* skip past os2. prefix */
- rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, ea_value,
- (__u16)value_size, cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+ ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */
+ if (pTcon->ses->server->ops->set_EA)
+ rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
+ full_path, ea_name, ea_value, (__u16)value_size,
+ cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
+ } else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL,
+ strlen(CIFS_XATTR_CIFS_ACL)) == 0) {
+#ifdef CONFIG_CIFS_ACL
+ struct cifs_ntsd *pacl;
+ pacl = kmalloc(value_size, GFP_KERNEL);
+ if (!pacl) {
+ rc = -ENOMEM;
+ } else {
+ memcpy(pacl, ea_value, value_size);
+ if (pTcon->ses->server->ops->set_acl)
+ rc = pTcon->ses->server->ops->set_acl(pacl,
+ value_size, direntry->d_inode,
+ full_path, CIFS_ACL_DACL);
+ else
+ rc = -EOPNOTSUPP;
+ if (rc == 0) /* force revalidate of the inode */
+ CIFS_I(direntry->d_inode)->time = 0;
+ kfree(pacl);
+ }
+#else
+ cifs_dbg(FYI, "Set CIFS ACL not supported yet\n");
+#endif /* CONFIG_CIFS_ACL */
} else {
int temp;
temp = strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,
@@ -177,9 +201,9 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name,
ACL_TYPE_ACCESS, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
- cFYI(1, "set POSIX ACL rc %d", rc);
+ cifs_dbg(FYI, "set POSIX ACL rc %d\n", rc);
#else
- cFYI(1, "set POSIX ACL not supported");
+ cifs_dbg(FYI, "set POSIX ACL not supported\n");
#endif
} else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT,
strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
@@ -190,13 +214,13 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name,
ACL_TYPE_DEFAULT, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
- cFYI(1, "set POSIX default ACL rc %d", rc);
+ cifs_dbg(FYI, "set POSIX default ACL rc %d\n", rc);
#else
- cFYI(1, "set default POSIX ACL not supported");
+ cifs_dbg(FYI, "set default POSIX ACL not supported\n");
#endif
} else {
- cFYI(1, "illegal xattr request %s (only user namespace"
- " supported)", ea_name);
+ cifs_dbg(FYI, "illegal xattr request %s (only user namespace supported)\n",
+ ea_name);
/* BB what if no namespace prefix? */
/* Should we just pass them to server, except for
system and perhaps security prefixes? */
@@ -205,7 +229,7 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name,
set_ea_exit:
kfree(full_path);
- FreeXid(xid);
+ free_xid(xid);
cifs_put_tlink(tlink);
#endif
return rc;
@@ -216,10 +240,10 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
{
ssize_t rc = -EOPNOTSUPP;
#ifdef CONFIG_CIFS_XATTR
- int xid;
+ unsigned int xid;
struct cifs_sb_info *cifs_sb;
struct tcon_link *tlink;
- struct cifsTconInfo *pTcon;
+ struct cifs_tcon *pTcon;
struct super_block *sb;
char *full_path;
@@ -237,7 +261,7 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
return PTR_ERR(tlink);
pTcon = tlink_tcon(tlink);
- xid = GetXid();
+ xid = get_xid();
full_path = build_path_from_dentry(direntry);
if (full_path == NULL) {
@@ -247,27 +271,32 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
/* return dos attributes as pseudo xattr */
/* return alt name if available as pseudo attr */
if (ea_name == NULL) {
- cFYI(1, "Null xattr names not supported");
- } else if (strncmp(ea_name, CIFS_XATTR_USER_PREFIX, 5) == 0) {
+ cifs_dbg(FYI, "Null xattr names not supported\n");
+ } else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
+ == 0) {
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
goto get_ea_exit;
if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0) {
- cFYI(1, "attempt to query cifs inode metadata");
+ cifs_dbg(FYI, "attempt to query cifs inode metadata\n");
/* revalidate/getattr then populate from inode */
} /* BB add else when above is implemented */
- ea_name += 5; /* skip past user. prefix */
- rc = CIFSSMBQAllEAs(xid, pTcon, full_path, ea_name, ea_value,
- buf_size, cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
- } else if (strncmp(ea_name, CIFS_XATTR_OS2_PREFIX, 4) == 0) {
+ ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
+ if (pTcon->ses->server->ops->query_all_EAs)
+ rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
+ full_path, ea_name, ea_value, buf_size,
+ cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
+ } else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) {
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
goto get_ea_exit;
- ea_name += 4; /* skip past os2. prefix */
- rc = CIFSSMBQAllEAs(xid, pTcon, full_path, ea_name, ea_value,
- buf_size, cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+ ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */
+ if (pTcon->ses->server->ops->query_all_EAs)
+ rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
+ full_path, ea_name, ea_value, buf_size,
+ cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
} else if (strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,
strlen(POSIX_ACL_XATTR_ACCESS)) == 0) {
#ifdef CONFIG_CIFS_POSIX
@@ -277,29 +306,8 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
-#ifdef CONFIG_CIFS_EXPERIMENTAL
- else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
- __u16 fid;
- int oplock = 0;
- struct cifs_ntsd *pacl = NULL;
- __u32 buflen = 0;
- if (experimEnabled)
- rc = CIFSSMBOpen(xid, pTcon, full_path,
- FILE_OPEN, GENERIC_READ, 0, &fid,
- &oplock, NULL, cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
- /* else rc is EOPNOTSUPP from above */
-
- if (rc == 0) {
- rc = CIFSSMBGetCIFSACL(xid, pTcon, fid, &pacl,
- &buflen);
- CIFSSMBClose(xid, pTcon, fid);
- }
- }
-#endif /* EXPERIMENTAL */
#else
- cFYI(1, "query POSIX ACL not supported yet");
+ cifs_dbg(FYI, "Query POSIX ACL not supported yet\n");
#endif /* CONFIG_CIFS_POSIX */
} else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT,
strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
@@ -311,18 +319,46 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
#else
- cFYI(1, "query POSIX default ACL not supported yet");
-#endif
+ cifs_dbg(FYI, "Query POSIX default ACL not supported yet\n");
+#endif /* CONFIG_CIFS_POSIX */
+ } else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL,
+ strlen(CIFS_XATTR_CIFS_ACL)) == 0) {
+#ifdef CONFIG_CIFS_ACL
+ u32 acllen;
+ struct cifs_ntsd *pacl;
+
+ if (pTcon->ses->server->ops->get_acl == NULL)
+ goto get_ea_exit; /* rc already EOPNOTSUPP */
+
+ pacl = pTcon->ses->server->ops->get_acl(cifs_sb,
+ direntry->d_inode, full_path, &acllen);
+ if (IS_ERR(pacl)) {
+ rc = PTR_ERR(pacl);
+ cifs_dbg(VFS, "%s: error %zd getting sec desc\n",
+ __func__, rc);
+ } else {
+ if (ea_value) {
+ if (acllen > buf_size)
+ acllen = -ERANGE;
+ else
+ memcpy(ea_value, pacl, acllen);
+ }
+ rc = acllen;
+ kfree(pacl);
+ }
+#else
+ cifs_dbg(FYI, "Query CIFS ACL not supported yet\n");
+#endif /* CONFIG_CIFS_ACL */
} else if (strncmp(ea_name,
- CIFS_XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) == 0) {
- cFYI(1, "Trusted xattr namespace not supported yet");
+ XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) == 0) {
+ cifs_dbg(FYI, "Trusted xattr namespace not supported yet\n");
} else if (strncmp(ea_name,
- CIFS_XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) == 0) {
- cFYI(1, "Security xattr namespace not supported yet");
+ XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) == 0) {
+ cifs_dbg(FYI, "Security xattr namespace not supported yet\n");
} else
- cFYI(1,
- "illegal xattr request %s (only user namespace supported)",
- ea_name);
+ cifs_dbg(FYI,
+ "illegal xattr request %s (only user namespace supported)\n",
+ ea_name);
/* We could add an additional check for streams ie
if proc/fs/cifs/streamstoxattr is set then
@@ -334,7 +370,7 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
get_ea_exit:
kfree(full_path);
- FreeXid(xid);
+ free_xid(xid);
cifs_put_tlink(tlink);
#endif
return rc;
@@ -344,10 +380,10 @@ ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size)
{
ssize_t rc = -EOPNOTSUPP;
#ifdef CONFIG_CIFS_XATTR
- int xid;
+ unsigned int xid;
struct cifs_sb_info *cifs_sb;
struct tcon_link *tlink;
- struct cifsTconInfo *pTcon;
+ struct cifs_tcon *pTcon;
struct super_block *sb;
char *full_path;
@@ -368,7 +404,7 @@ ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size)
return PTR_ERR(tlink);
pTcon = tlink_tcon(tlink);
- xid = GetXid();
+ xid = get_xid();
full_path = build_path_from_dentry(direntry);
if (full_path == NULL) {
@@ -381,14 +417,15 @@ ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size)
/* if proc/fs/cifs/streamstoxattr is set then
search server for EAs or streams to
returns as xattrs */
- rc = CIFSSMBQAllEAs(xid, pTcon, full_path, NULL, data,
- buf_size, cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
+ if (pTcon->ses->server->ops->query_all_EAs)
+ rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
+ full_path, NULL, data, buf_size,
+ cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
list_ea_exit:
kfree(full_path);
- FreeXid(xid);
+ free_xid(xid);
cifs_put_tlink(tlink);
#endif
return rc;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 01:42:40 +0000