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symlink: rename and link handle ERROR_REPARSE

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when rename or link call nfs41_lookup() for the destination directory, they need to be able to handle ERROR_REPARSE and find the real dest dir

open now does the same thing when it sees ERROR_REPARSE; previously, it was only replacing the first symlink in the path, and could require multiple reparses on a path

modified nfs41_symlink_target() to support the case where the source and destination paths are the same (used by rename/link)

Signed-off-by: Casey Bodley <cbodley@citi.umich.edu>
This commit is contained in:
Casey Bodley 2010-10-15 14:30:41 -04:00 • committed by unknown
parent e37b33a4df
commit 1ad1c0f262
3 changed files with 49 additions and 19 deletions
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28
daemon/symlink.c
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@ -113,29 +113,31 @@ int nfs41_symlink_target(
dprintf(2, "--> nfs41_symlink_target('%s', '%s')\n", path->path, link);
/* append any components after the symlink */
if (FAILED(StringCchCatA(link, NFS41_MAX_PATH_LEN,
file->name.name + file->name.len))) {
status = ERROR_BUFFER_OVERFLOW;
goto out;
}
link_len = (uint32_t)strlen(link);
/* overwrite the last component of the path; get the starting offset */
path_offset = file->name.name - path->path;
/* copy the path and update it with the results from link */
target->len = path->len;
if (FAILED(StringCchCopyNA(target->path, NFS41_MAX_PATH_LEN,
path->path, path->len))) {
status = ERROR_BUFFER_OVERFLOW;
goto out;
if (target != path) {
target->len = path->len;
if (FAILED(StringCchCopyNA(target->path, NFS41_MAX_PATH_LEN,
path->path, path->len))) {
status = ERROR_BUFFER_OVERFLOW;
goto out;
}
}
status = abs_path_link(target, target->path + path_offset, link, link_len);
if (status) {
eprintf("abs_path_link() failed with %d\n", status);
goto out;
}
/* append any components after the symlink */
if (FAILED(StringCchCopyA(target->path + target->len,
NFS41_MAX_PATH_LEN - target->len, file->name.name + file->name.len))) {
status = ERROR_BUFFER_OVERFLOW;
goto out;
}
target->len = (unsigned short)strlen(target->path);
out:
dprintf(2, "<-- nfs41_symlink_target('%s') returning %d\n",
target->path, status);