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libglusterfsclient: Add lstat API

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Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
This commit is contained in:
Shehjar Tikoo 2009-04-16 23:58:39 -07:00 committed by Anand V. Avati
parent 7cd3cc24c8
commit 4ada36f9bd
1 changed files with 81 additions and 5 deletions
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86
libglusterfsclient/src/libglusterfsclient.c
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@ -48,6 +48,8 @@
static inline xlator_t *
libglusterfs_graph (xlator_t *graph);
int32_t libgf_client_readlink (libglusterfs_client_ctx_t *ctx, loc_t *loc,
char *buf, size_t bufsize);
static int first_init = 1;
static int first_fini = 1;
@ -3060,16 +3062,57 @@ out:
return op_ret;
}
int32_t
glusterfs_stat (glusterfs_handle_t handle,
const char *path,
struct stat *buf)
int
libgf_readlink_loc_fill (libglusterfs_client_ctx_t *ctx, loc_t *linkloc,
loc_t *targetloc)
{
char targetpath[PATH_MAX];
int op_ret = -1;
char *target = NULL;
GF_VALIDATE_OR_GOTO (LIBGF_XL_NAME, ctx, out);
GF_VALIDATE_OR_GOTO (LIBGF_XL_NAME, linkloc, out);
GF_VALIDATE_OR_GOTO (LIBGF_XL_NAME, targetloc, out);
op_ret = libgf_client_readlink (ctx, linkloc, targetpath, PATH_MAX);
if (op_ret == -1)
goto out;
targetloc->path = strdup (targetpath);
op_ret = libgf_client_path_lookup (targetloc, ctx, 1);
if (op_ret == -1)
goto out;
target = strdup (targetpath);
op_ret = libgf_client_loc_fill (targetloc, ctx, 0,
targetloc->parent->ino,
basename (target));
if (op_ret == -1) {
errno = EINVAL;
goto out;
}
out:
if (target)
FREE (target);
return op_ret;
}
#define LIBGF_DO_LSTAT 0x01
#define LIBGF_DO_STAT 0x02
int
__glusterfs_stat (glusterfs_handle_t handle, const char *path,
struct stat *buf, int whichstat)
{
int32_t op_ret = -1;
loc_t loc = {0, };
libglusterfs_client_ctx_t *ctx = handle;
xlator_t *this = NULL;
char *name = NULL, *pathname = NULL;
loc_t targetloc = {0, };
loc_t *real_loc = NULL;
GF_VALIDATE_OR_GOTO (LIBGF_XL_NAME, ctx, out);
GF_VALIDATE_ABSOLUTE_PATH_OR_GOTO (LIBGF_XL_NAME, path, out);
@ -3094,10 +3137,30 @@ glusterfs_stat (glusterfs_handle_t handle,
errno = EINVAL;
goto out;
}
real_loc = &loc;
/* The stat fop in glusterfs calls lstat. So we have to
* provide the POSIX compatible stat fop. To do so, we need to ensure
* that if the @path is a symlink, we must perform a stat on the
* target of that symlink that the symlink itself(..because if
* do a stat on the symlink, we're actually doing what lstat
* should do.
*/
if (whichstat & LIBGF_DO_LSTAT)
goto lstat_fop;
if (!S_ISLNK (loc.inode->st_mode))
goto lstat_fop;
op_ret = libgf_readlink_loc_fill (ctx, &loc, &targetloc);
if (op_ret == -1)
goto out;
real_loc = &targetloc;
lstat_fop:
this = ctx->gf_ctx.graph;
if (!op_ret) {
op_ret = libgf_client_stat (ctx, &loc, buf);
op_ret = libgf_client_stat (ctx, real_loc, buf);
}
out:
@ -3106,9 +3169,22 @@ out:
}
libgf_client_loc_wipe (&loc);
libgf_client_loc_wipe (&targetloc);
return op_ret;
}
int
glusterfs_stat (glusterfs_handle_t handle, const char *path, struct stat *buf)
{
return __glusterfs_stat (handle, path, buf, LIBGF_DO_STAT);
}
int
glusterfs_lstat (glusterfs_handle_t handle, const char *path, struct stat *buf)
{
return __glusterfs_stat (handle, path, buf, LIBGF_DO_LSTAT);
}
static int32_t
libgf_client_fstat_cbk (call_frame_t *frame,