[PATCH 4/7] fsstress: add operation for removing xattrs from files and directories

[fdmanana]

From: Filipe Manana <fdman...@suse.com>

The previous patches added support for operations to set and get xattrs on
regular files and directories, this patch just adds one operation to remove
xattrs on files and directories.

Signed-off-by: Filipe Manana <fdman...@suse.com>
---
 ltp/fsstress.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)

diff --git a/ltp/fsstress.c b/ltp/fsstress.c
index d7ea1da0..ffe78ef7 100644
--- a/ltp/fsstress.c
+++ b/ltp/fsstress.c
@@ -83,6 +83,7 @@ typedef enum {
        OP_READ,
        OP_READLINK,
        OP_READV,
+       OP_REMOVEXATTR,
        OP_RENAME,
        OP_RESVSP,
        OP_RMDIR,
@@ -196,6 +197,7 @@ void        insert_f(int, long);
 void   read_f(int, long);
 void   readlink_f(int, long);
 void   readv_f(int, long);
+void   removexattr_f(int, long);
 void   rename_f(int, long);
 void   resvsp_f(int, long);
 void   rmdir_f(int, long);
@@ -249,6 +251,7 @@ opdesc_t    ops[] = {
        { OP_READ, "read", read_f, 1, 0 },
        { OP_READLINK, "readlink", readlink_f, 1, 0 },
        { OP_READV, "readv", readv_f, 1, 0 },
+       { OP_REMOVEXATTR, "removexattr", removexattr_f, 2, 1 },
        { OP_RENAME, "rename", rename_f, 2, 1 },
        { OP_RESVSP, "resvsp", resvsp_f, 1, 1 },
        { OP_RMDIR, "rmdir", rmdir_f, 1, 1 },
@@ -4054,6 +4057,67 @@ readv_f(int opno, long r)
 }
 
 void
+removexattr_f(int opno, long r)
+{
+       int             fd;
+       fent_t          *fep;
+       int             e;
+       pathname_t      f;
+       int             v;
+       char            name[18];
+       int             xattr_num;
+       DIR             *dir = NULL;
+
+       init_pathname(&f);
+       if (!get_fname(FT_REGFILE | FT_DIRm, r, &f, NULL, &fep, &v)) {
+               if (v)
+                       printf("%d/%d: removexattr - no filename\n", procid, 
opno);
+               free_pathname(&f);
+               return;
+       }
+       fd = open_path(&f, O_WRONLY);
+       if (fd < 0 && errno == EISDIR) {
+               dir = opendir_path(&f);
+               if (dir)
+                       fd = dirfd(dir);
+       }
+       e = fd < 0 ? errno : 0;
+       if (fd < 0) {
+               if (v)
+                       printf("%d/%d: removexattr - open %s failed %d\n",
+                              procid, opno, f.path, e);
+               free_pathname(&f);
+               if (dir)
+                       closedir(dir);
+               return;
+       }
+       check_cwd();
+
+       /*
+        * If the file/dir has xattrs, pick one randomly, otherwise attempt to
+        * remove a xattr that doesn't exist (fremovexattr should fail with
+        * errno set to ENOATTR (61) in this case).
+        */
+       if (fep->xattr_counter > 0)
+               xattr_num = (random() % fep->xattr_counter) + 1;
+       else
+               xattr_num = 0;
+
+       memcpy(name, "user.x", 6);
+       sprintf(name + 6, "%d", xattr_num);
+
+       e = fremovexattr(fd, name) < 0 ? errno : 0;
+       if (v)
+               printf("%d/%d: removexattr file %s name %s %d\n",
+                      procid, opno, f.path, name, e);
+       free_pathname(&f);
+       if (dir)
+               closedir(dir);
+       else
+               close(fd);
+}
+
+void
 rename_f(int opno, long r)
 {
        fent_t          *dfep;
-- 
2.11.0