dovecot/original-hg/dovecot-1.2: src/lib/nfs-workarounds.c annotate

annotate src/lib/nfs-workarounds.c @ 6858:78922561e9ea HEAD

Don't try to rmdir() the file to flush its file handle with FreeBSD. Although it appeared to work in my test program, looks like it doesn't really work after all..

author	Timo Sirainen <tss@iki.fi>
date	Mon, 26 Nov 2007 12:09:05 +0200
parents	41911abe6fa7
children	95caa2ab300c

rev	line source
6429 65c69a53a7be Replaced my Copyright notices. The year range always ends with 2007 now. Timo Sirainen <tss@iki.fi> parents: 6411 diff changeset	1 /* Copyright (c) 2006-2007 Dovecot authors, see the included COPYING file */
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	2
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	3 /*
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	4 These tests were done with various Linux 2.6 kernels, FreeBSD 6.2 and
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	5 Solaris 8 and 10.
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	6
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	7 Attribute cache is usually flushed with chown()ing or fchown()ing the file.
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	8 The safest way would be to use uid=-1 gid=-1, but this doesn't work with
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	9 Linux (it does with FreeBSD 6.2 and Solaris). So we'll first get the
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	10 file's owner and use it. As long as we're not root the file's owner can't
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	11 change accidentally. If would be possible to also use chmod()/fchmod(), but
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	12 that's riskier since it could actually cause an unwanted change.
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	13
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	14 Write cache can be flushed with fdatasync(). It's all we need, but other
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	15 tested alternatives are: fcntl locking (Linux 2.6, Solaris),
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	16 fchown() (Solaris) and dup()+close() (Linux 2.6, Solaris).
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	17
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	18 Read cache flushing is more problematic. There's no universal way to do it.
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	19 The working methods are:
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	20
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	21 Linux 2.6: fcntl(), O_DIRECT
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	22 Solaris: fchown(), fcntl(), dup()+close()
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	23 FreeBSD 6.2: fchown()
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	24
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	25 fchown() can be easily used for Solaris and FreeBSD, but Linux requires
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	26 playing with locks. O_DIRECT requires CONFIG_NFS_DIRECTIO to be enabled, so
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	27 we can't always use it.
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	28 */
4071 cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	29
cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	30 #include "lib.h"
cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	31 #include "nfs-workarounds.h"
cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	32
cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	33 #include <fcntl.h>
cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	34 #include <unistd.h>
cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	35 #include <sys/stat.h>
cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	36
6829 dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	37 #if defined (__linux__) \|\| defined(__sun)
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	38 # define READ_CACHE_FLUSH_FCNTL
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	39 #endif
6820 6dfb3969baae FreeBSD and Solaris supports flushing attribute cache with chown(uid=-1, Timo Sirainen <tss@iki.fi> parents: 6819 diff changeset	40 #if defined(__FreeBSD__) \|\| defined(__sun)
6dfb3969baae FreeBSD and Solaris supports flushing attribute cache with chown(uid=-1, Timo Sirainen <tss@iki.fi> parents: 6819 diff changeset	41 # define ATTRCACHE_FLUSH_CHOWN_UID_1
6dfb3969baae FreeBSD and Solaris supports flushing attribute cache with chown(uid=-1, Timo Sirainen <tss@iki.fi> parents: 6819 diff changeset	42 #endif
6dfb3969baae FreeBSD and Solaris supports flushing attribute cache with chown(uid=-1, Timo Sirainen <tss@iki.fi> parents: 6819 diff changeset	43
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	44 static void nfs_flush_file_handle_cache_parent_dir(const char *path);
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	45
4225 abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	46 static int
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	47 nfs_safe_do(const char path, int (callback)(const char path, void context),
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	48 void *context)
4071 cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	49 {
cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	50 unsigned int i;
4225 abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	51 int ret;
4071 cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	52
cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	53 t_push();
cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	54 for (i = 1;; i++) {
4225 abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	55 ret = callback(path, context);
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	56 if (ret == 0 \|\| errno != ESTALE \|\| i == NFS_ESTALE_RETRY_COUNT)
4071 cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	57 break;
cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	58
cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	59 /* ESTALE: Some operating systems may fail with this if they
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	60 can't internally revalidate the NFS file handle. Flush the
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	61 file handle and try again */
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	62 nfs_flush_file_handle_cache(path);
4071 cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	63 }
cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	64 t_pop();
4225 abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	65 return ret;
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	66 }
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	67
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	68 struct nfs_safe_open_context {
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	69 int flags;
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	70 int fd;
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	71 };
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	72
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	73 static int nfs_safe_open_callback(const char path, void context)
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	74 {
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	75 struct nfs_safe_open_context *ctx = context;
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	76
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	77 ctx->fd = open(path, ctx->flags);
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	78 return ctx->fd == -1 ? -1 : 0;
4071 cd3d26cf124a Renamed safe-open.* to nfs-workarounds., safe_open() to nfs_safe_open() and Timo Sirainen <tss@iki.fi>* parents: diff changeset	79 }
4225 abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	80
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	81 int nfs_safe_open(const char *path, int flags)
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	82 {
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	83 struct nfs_safe_open_context ctx;
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	84
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	85 i_assert((flags & O_CREAT) == 0);
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	86
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	87 ctx.flags = flags;
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	88 if (nfs_safe_do(path, nfs_safe_open_callback, &ctx) < 0)
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	89 return -1;
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	90
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	91 return ctx.fd;
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	92 }
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	93
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	94 static int nfs_safe_stat_callback(const char path, void context)
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	95 {
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	96 struct stat *buf = context;
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	97
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	98 return stat(path, buf);
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	99 }
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	100
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	101 int nfs_safe_stat(const char path, struct stat buf)
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	102 {
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	103 return nfs_safe_do(path, nfs_safe_stat_callback, buf);
abdef9d86a94 Added nfs_safe_stat() to transparently work around ESTALE with stat(). Timo Sirainen <timo.sirainen@movial.fi> parents: 4071 diff changeset	104 }
5968 885ed4d5c51d Added nfs_safe_lstat() Timo Sirainen <tss@iki.fi> parents: 4225 diff changeset	105
885ed4d5c51d Added nfs_safe_lstat() Timo Sirainen <tss@iki.fi> parents: 4225 diff changeset	106 static int nfs_safe_lstat_callback(const char path, void context)
885ed4d5c51d Added nfs_safe_lstat() Timo Sirainen <tss@iki.fi> parents: 4225 diff changeset	107 {
885ed4d5c51d Added nfs_safe_lstat() Timo Sirainen <tss@iki.fi> parents: 4225 diff changeset	108 struct stat *buf = context;
885ed4d5c51d Added nfs_safe_lstat() Timo Sirainen <tss@iki.fi> parents: 4225 diff changeset	109
885ed4d5c51d Added nfs_safe_lstat() Timo Sirainen <tss@iki.fi> parents: 4225 diff changeset	110 return lstat(path, buf);
885ed4d5c51d Added nfs_safe_lstat() Timo Sirainen <tss@iki.fi> parents: 4225 diff changeset	111 }
885ed4d5c51d Added nfs_safe_lstat() Timo Sirainen <tss@iki.fi> parents: 4225 diff changeset	112
885ed4d5c51d Added nfs_safe_lstat() Timo Sirainen <tss@iki.fi> parents: 4225 diff changeset	113 int nfs_safe_lstat(const char path, struct stat buf)
885ed4d5c51d Added nfs_safe_lstat() Timo Sirainen <tss@iki.fi> parents: 4225 diff changeset	114 {
885ed4d5c51d Added nfs_safe_lstat() Timo Sirainen <tss@iki.fi> parents: 4225 diff changeset	115 return nfs_safe_do(path, nfs_safe_lstat_callback, buf);
885ed4d5c51d Added nfs_safe_lstat() Timo Sirainen <tss@iki.fi> parents: 4225 diff changeset	116 }
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	117
6813 575235932194 nfs_safe_link(): Support linking files without original link count=1. Use it Timo Sirainen <tss@iki.fi> parents: 6811 diff changeset	118 int nfs_safe_link(const char oldpath, const char newpath, bool links1)
6811 9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	119 {
9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	120 struct stat st;
6813 575235932194 nfs_safe_link(): Support linking files without original link count=1. Use it Timo Sirainen <tss@iki.fi> parents: 6811 diff changeset	121 nlink_t orig_link_count = 1;
6811 9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	122
6813 575235932194 nfs_safe_link(): Support linking files without original link count=1. Use it Timo Sirainen <tss@iki.fi> parents: 6811 diff changeset	123 if (!links1) {
575235932194 nfs_safe_link(): Support linking files without original link count=1. Use it Timo Sirainen <tss@iki.fi> parents: 6811 diff changeset	124 if (stat(oldpath, &st) < 0)
575235932194 nfs_safe_link(): Support linking files without original link count=1. Use it Timo Sirainen <tss@iki.fi> parents: 6811 diff changeset	125 return -1;
575235932194 nfs_safe_link(): Support linking files without original link count=1. Use it Timo Sirainen <tss@iki.fi> parents: 6811 diff changeset	126 orig_link_count = st.st_nlink;
6811 9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	127 }
6813 575235932194 nfs_safe_link(): Support linking files without original link count=1. Use it Timo Sirainen <tss@iki.fi> parents: 6811 diff changeset	128
6811 9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	129 if (link(oldpath, newpath) == 0) {
9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	130 #ifndef __FreeBSD__
9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	131 return 0;
9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	132 #endif
9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	133 /* FreeBSD at least up to v6.2 converts EEXIST errors to
9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	134 success. */
9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	135 } else if (errno != EEXIST)
9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	136 return -1;
9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	137
9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	138 /* We don't know if it succeeded or failed. stat() to make sure. */
9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	139 if (stat(oldpath, &st) < 0)
9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	140 return -1;
6813 575235932194 nfs_safe_link(): Support linking files without original link count=1. Use it Timo Sirainen <tss@iki.fi> parents: 6811 diff changeset	141 if (st.st_nlink == orig_link_count) {
6811 9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	142 errno = EEXIST;
9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	143 return -1;
9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	144 }
9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	145 return 0;
9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	146 }
9bc620b934f4 Added nfs_safe_link(). Timo Sirainen <tss@iki.fi> parents: 6797 diff changeset	147
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	148 static void nfs_flush_chown_uid(const char *path)
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	149 {
6820 6dfb3969baae FreeBSD and Solaris supports flushing attribute cache with chown(uid=-1, Timo Sirainen <tss@iki.fi> parents: 6819 diff changeset	150 uid_t uid;
6dfb3969baae FreeBSD and Solaris supports flushing attribute cache with chown(uid=-1, Timo Sirainen <tss@iki.fi> parents: 6819 diff changeset	151
6dfb3969baae FreeBSD and Solaris supports flushing attribute cache with chown(uid=-1, Timo Sirainen <tss@iki.fi> parents: 6819 diff changeset	152 #ifdef ATTRCACHE_FLUSH_CHOWN_UID_1
6dfb3969baae FreeBSD and Solaris supports flushing attribute cache with chown(uid=-1, Timo Sirainen <tss@iki.fi> parents: 6819 diff changeset	153 uid = (uid_t)-1;
6dfb3969baae FreeBSD and Solaris supports flushing attribute cache with chown(uid=-1, Timo Sirainen <tss@iki.fi> parents: 6819 diff changeset	154 #else
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	155 struct stat st;
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	156
6820 6dfb3969baae FreeBSD and Solaris supports flushing attribute cache with chown(uid=-1, Timo Sirainen <tss@iki.fi> parents: 6819 diff changeset	157 if (stat(path, &st) == 0)
6dfb3969baae FreeBSD and Solaris supports flushing attribute cache with chown(uid=-1, Timo Sirainen <tss@iki.fi> parents: 6819 diff changeset	158 uid = st.st_uid;
6dfb3969baae FreeBSD and Solaris supports flushing attribute cache with chown(uid=-1, Timo Sirainen <tss@iki.fi> parents: 6819 diff changeset	159 else {
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	160 if (errno == ESTALE) {
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	161 /* ESTALE causes the OS to flush the attr cache */
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	162 return;
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	163 }
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	164 if (likely(errno == ENOENT)) {
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	165 nfs_flush_file_handle_cache_parent_dir(path);
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	166 return;
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	167 }
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	168 i_error("nfs_flush_chown_uid: stat(%s) failed: %m", path);
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	169 return;
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	170 }
6820 6dfb3969baae FreeBSD and Solaris supports flushing attribute cache with chown(uid=-1, Timo Sirainen <tss@iki.fi> parents: 6819 diff changeset	171 #endif
6dfb3969baae FreeBSD and Solaris supports flushing attribute cache with chown(uid=-1, Timo Sirainen <tss@iki.fi> parents: 6819 diff changeset	172 if (chown(path, uid, (gid_t)-1) < 0) {
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	173 if (errno == ESTALE \|\| errno == EPERM \|\| errno == ENOENT) {
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	174 /* attr cache is flushed */
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	175 return;
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	176 }
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	177 if (likely(errno == ENOENT)) {
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	178 nfs_flush_file_handle_cache_parent_dir(path);
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	179 return;
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	180 }
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	181 i_error("nfs_flush_chown_uid: chown(%s) failed: %m", path);
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	182 }
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	183 }
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	184
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	185 #ifdef __FreeBSD__
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	186 static bool nfs_flush_fchown_uid(const char *path, int fd)
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	187 {
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	188 uid_t uid;
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	189 #ifndef ATTRCACHE_FLUSH_CHOWN_UID_1
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	190 struct stat st;
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	191
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	192 if (fstat(fd, &st) < 0) {
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	193 if (likely(errno == ESTALE))
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	194 return FALSE;
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	195 i_error("nfs_flush_attr_cache_fchown: fstat(%s) failed: %m",
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	196 path);
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	197 return TRUE;
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	198 }
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	199 uid = st.st_uid;
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	200 #endif
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	201 if (fchown(fd, uid, (gid_t)-1) < 0) {
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	202 if (errno == ESTALE)
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	203 return FALSE;
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	204 if (likely(errno == EACCES \|\| errno == EPERM)) {
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	205 /* attr cache is flushed */
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	206 return TRUE;
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	207 }
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	208
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	209 i_error("nfs_flush_attr_cache_fd_locked: fchown(%s) failed: %m",
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	210 path);
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	211 }
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	212 return TRUE;
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	213 }
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	214 #endif
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	215
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	216 #ifdef READ_CACHE_FLUSH_FCNTL
6829 dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	217 static void nfs_flush_fcntl(const char *path, int fd)
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	218 {
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	219 struct flock fl;
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	220 int ret;
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	221
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	222 /* If the file was already locked, we'll just get the same lock
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	223 again. It should succeed just fine. If was was unlocked, we'll
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	224 have to get a lock and then unlock it. Linux 2.6 flushes read cache
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	225 only when read/write locking succeeded. */
6829 dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	226 fl.l_type = F_RDLCK;
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	227 fl.l_whence = SEEK_SET;
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	228 fl.l_start = 0;
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	229 fl.l_len = 0;
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	230
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	231 alarm(60);
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	232 ret = fcntl(fd, F_SETLKW, &fl);
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	233 alarm(0);
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	234
6825 85385079b044 Use likely() and unlikely() macros to make commonly checked error handling Timo Sirainen <tss@iki.fi> parents: 6820 diff changeset	235 if (unlikely(ret < 0)) {
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	236 i_error("nfs_flush_fcntl: fcntl(%s, F_RDLCK) failed: %m", path);
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	237 return;
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	238 }
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	239
6829 dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	240 fl.l_type = F_UNLCK;
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	241 (void)fcntl(fd, F_SETLKW, &fl);
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	242 }
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	243 #endif
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	244
6829 dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	245 void nfs_flush_attr_cache_unlocked(const char *path)
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	246 {
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	247 int fd;
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	248
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	249 /* Try to flush the attribute cache the nice way first. */
6829 dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	250 fd = open(path, O_RDONLY);
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	251 if (fd != -1)
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	252 (void)close(fd);
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	253 else if (errno == ESTALE) {
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	254 /* this already flushed the cache */
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	255 } else {
6829 dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	256 /* most likely ENOENT, which means a negative cache hit.
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	257 flush the file handles for its parent directory. */
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	258 nfs_flush_file_handle_cache_parent_dir(path);
6829 dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	259 }
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	260 }
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	261
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	262 void nfs_flush_attr_cache_maybe_locked(const char *path)
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	263 {
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	264 nfs_flush_chown_uid(path);
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	265 }
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	266
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	267 bool nfs_flush_attr_cache_fd_locked(const char *path ATTR_UNUSED,
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	268 int fd ATTR_UNUSED)
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	269 {
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	270 #ifdef __FreeBSD__
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	271 /* FreeBSD doesn't flush attribute cache with fcntl(), so we have
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	272 to do it ourself. */
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	273 return nfs_flush_fchown_uid(path, fd);
6829 dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	274 #else
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	275 /* Linux and Solaris are fine. */
6829 dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	276 return TRUE;
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	277 #endif
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	278 }
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	279
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	280 static bool nfs_flush_file_handle_cache_dir(const char *path)
6819 256725979152 nfs_flush_attr_cache() doesn't take flush_dir paramter anymore. Instead the Timo Sirainen <tss@iki.fi> parents: 6816 diff changeset	281 {
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	282 #ifdef __linux__
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	283 /* chown()ing parent is the safest way to handle this */
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	284 nfs_flush_chown_uid(path);
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	285 #else
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	286 /* rmdir() is the only choice with FreeBSD and Solaris */
6825 85385079b044 Use likely() and unlikely() macros to make commonly checked error handling Timo Sirainen <tss@iki.fi> parents: 6820 diff changeset	287 if (unlikely(rmdir(path) == 0)) {
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	288 if (mkdir(path, 0700) == 0) {
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	289 i_warning("nfs_flush_file_handle_cache_dir: "
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	290 "rmdir(%s) unexpectedly "
6819 256725979152 nfs_flush_attr_cache() doesn't take flush_dir paramter anymore. Instead the Timo Sirainen <tss@iki.fi> parents: 6816 diff changeset	291 "removed the dir. recreated.", path);
256725979152 nfs_flush_attr_cache() doesn't take flush_dir paramter anymore. Instead the Timo Sirainen <tss@iki.fi> parents: 6816 diff changeset	292 } else {
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	293 i_warning("nfs_flush_file_handle_cache_dir: "
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	294 "rmdir(%s) unexpectedly "
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	295 "removed the dir. mkdir() failed: %m", path);
6819 256725979152 nfs_flush_attr_cache() doesn't take flush_dir paramter anymore. Instead the Timo Sirainen <tss@iki.fi> parents: 6816 diff changeset	296 }
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	297 } else if (errno == ESTALE \|\| errno == ENOTDIR \|\| errno == ENOTEMPTY) {
6819 256725979152 nfs_flush_attr_cache() doesn't take flush_dir paramter anymore. Instead the Timo Sirainen <tss@iki.fi> parents: 6816 diff changeset	298 /* expected failures */
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	299 } else if (errno == ENOENT) {
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	300 return FALSE;
6819 256725979152 nfs_flush_attr_cache() doesn't take flush_dir paramter anymore. Instead the Timo Sirainen <tss@iki.fi> parents: 6816 diff changeset	301 } else {
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	302 i_error("nfs_flush_file_handle_cache_dir: "
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	303 "rmdir(%s) failed: %m", path);
6819 256725979152 nfs_flush_attr_cache() doesn't take flush_dir paramter anymore. Instead the Timo Sirainen <tss@iki.fi> parents: 6816 diff changeset	304 }
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	305 #endif
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	306 return TRUE;
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	307 }
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	308
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	309 static void nfs_flush_file_handle_cache_parent_dir(const char *path)
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	310 {
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	311 const char *p;
6829 dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	312
6857 41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	313 p = strrchr(path, '/');
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	314 if (p == NULL)
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	315 nfs_flush_file_handle_cache_dir(".");
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	316 else {
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	317 t_push();
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	318 nfs_flush_file_handle_cache_dir(t_strdup_until(path, p));
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	319 t_pop();
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	320 }
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	321 }
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	322
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	323 void nfs_flush_file_handle_cache(const char *path)
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	324 {
41911abe6fa7 NFS cache flushing updates. Timo Sirainen <tss@iki.fi> parents: 6829 diff changeset	325 nfs_flush_file_handle_cache_parent_dir(path);
6819 256725979152 nfs_flush_attr_cache() doesn't take flush_dir paramter anymore. Instead the Timo Sirainen <tss@iki.fi> parents: 6816 diff changeset	326 }
256725979152 nfs_flush_attr_cache() doesn't take flush_dir paramter anymore. Instead the Timo Sirainen <tss@iki.fi> parents: 6816 diff changeset	327
6829 dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	328 void nfs_flush_read_cache_locked(const char *path ATTR_UNUSED,
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	329 int fd ATTR_UNUSED)
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	330 {
6829 dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	331 #ifdef READ_CACHE_FLUSH_FCNTL
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	332 /* already flushed when fcntl() was called */
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	333 #else
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	334 /* we can only hope that underlying filesystem uses micro/nanosecond
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	335 resolution so that attribute cache flushing notices mtime changes */
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	336 nfs_flush_attr_cache_fd_locked(path, fd);
dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	337 #endif
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	338 }
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	339
6829 dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	340 void nfs_flush_read_cache_unlocked(const char *path, int fd)
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	341 {
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	342 #ifdef READ_CACHE_FLUSH_FCNTL
6829 dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	343 nfs_flush_fcntl(path, fd);
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	344 #else
6829 dbab5e592577 NFS cache flushing APIs changed and backend implements it a bit differently. Timo Sirainen <tss@iki.fi> parents: 6825 diff changeset	345 nfs_flush_read_cache_locked(path, fd);
5970 a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	346 #endif
a290b84d144a Added nfs_flush_attr_cache() and nfs_flush_read_cache(). Timo Sirainen <tss@iki.fi> parents: 5968 diff changeset	347 }

Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/lib/nfs-workarounds.c @ 6858:78922561e9ea HEAD