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linux/net/ceph/ceph_fs.c

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ceph: on-wire types These headers describe the types used to exchange messages between the Ceph client and various servers. All types are little-endian and packed. These headers are shared between the kernel and userspace, so all types are in terms of e.g. __u32. Additionally, we define a few magic values to identify the current version of the protocol(s) in use, so that discrepancies to be detected on mount. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-07 02:31:06 +08:00
/*
* Some non-inline ceph helpers
*/
ceph: factor out libceph from Ceph file system This factors out protocol and low-level storage parts of ceph into a separate libceph module living in net/ceph and include/linux/ceph. This is mostly a matter of moving files around. However, a few key pieces of the interface change as well: - ceph_client becomes ceph_fs_client and ceph_client, where the latter captures the mon and osd clients, and the fs_client gets the mds client and file system specific pieces. - Mount option parsing and debugfs setup is correspondingly broken into two pieces. - The mon client gets a generic handler callback for otherwise unknown messages (mds map, in this case). - The basic supported/required feature bits can be expanded (and are by ceph_fs_client). No functional change, aside from some subtle error handling cases that got cleaned up in the refactoring process. Signed-off-by: Sage Weil <sage@newdream.net>
2010-04-07 06:14:15 +08:00
#include <linux/module.h>
#include <linux/ceph/types.h>
ceph: on-wire types These headers describe the types used to exchange messages between the Ceph client and various servers. All types are little-endian and packed. These headers are shared between the kernel and userspace, so all types are in terms of e.g. __u32. Additionally, we define a few magic values to identify the current version of the protocol(s) in use, so that discrepancies to be detected on mount. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-07 02:31:06 +08:00
ceph: add file layout validation This tracks updates to code shared with userspace. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-10 07:38:45 +08:00
/*
* return true if @layout appears to be valid
*/
int ceph_file_layout_is_valid(const struct ceph_file_layout *layout)
{
__u32 su = le32_to_cpu(layout->fl_stripe_unit);
__u32 sc = le32_to_cpu(layout->fl_stripe_count);
__u32 os = le32_to_cpu(layout->fl_object_size);
/* stripe unit, object size must be non-zero, 64k increment */
if (!su || (su & (CEPH_MIN_STRIPE_UNIT-1)))
return 0;
if (!os || (os & (CEPH_MIN_STRIPE_UNIT-1)))
return 0;
/* object size must be a multiple of stripe unit */
if (os < su || os % su)
return 0;
/* stripe count must be non-zero */
if (!sc)
return 0;
return 1;
}
ceph: on-wire types These headers describe the types used to exchange messages between the Ceph client and various servers. All types are little-endian and packed. These headers are shared between the kernel and userspace, so all types are in terms of e.g. __u32. Additionally, we define a few magic values to identify the current version of the protocol(s) in use, so that discrepancies to be detected on mount. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-07 02:31:06 +08:00
int ceph_flags_to_mode(int flags)
{
ceph: request FILE_LAZYIO cap when LAZY file mode is set Also clean up the file flags -> file mode -> wanted caps functions while we're at it. This resyncs this file with userspace. Signed-off-by: Sage Weil <sage@newdream.net>
2010-05-26 07:46:24 +08:00
int mode;
ceph: on-wire types These headers describe the types used to exchange messages between the Ceph client and various servers. All types are little-endian and packed. These headers are shared between the kernel and userspace, so all types are in terms of e.g. __u32. Additionally, we define a few magic values to identify the current version of the protocol(s) in use, so that discrepancies to be detected on mount. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-07 02:31:06 +08:00
#ifdef O_DIRECTORY /* fixme */
if ((flags & O_DIRECTORY) == O_DIRECTORY)
return CEPH_FILE_MODE_PIN;
#endif
ceph: request FILE_LAZYIO cap when LAZY file mode is set Also clean up the file flags -> file mode -> wanted caps functions while we're at it. This resyncs this file with userspace. Signed-off-by: Sage Weil <sage@newdream.net>
2010-05-26 07:46:24 +08:00
if ((flags & O_APPEND) == O_APPEND)
flags |= O_WRONLY;
if ((flags & O_ACCMODE) == O_RDWR)
mode = CEPH_FILE_MODE_RDWR;
else if ((flags & O_ACCMODE) == O_WRONLY)
mode = CEPH_FILE_MODE_WR;
else
mode = CEPH_FILE_MODE_RD;
ceph: on-wire types These headers describe the types used to exchange messages between the Ceph client and various servers. All types are little-endian and packed. These headers are shared between the kernel and userspace, so all types are in terms of e.g. __u32. Additionally, we define a few magic values to identify the current version of the protocol(s) in use, so that discrepancies to be detected on mount. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-07 02:31:06 +08:00
#ifdef O_LAZY
if (flags & O_LAZY)
ceph: request FILE_LAZYIO cap when LAZY file mode is set Also clean up the file flags -> file mode -> wanted caps functions while we're at it. This resyncs this file with userspace. Signed-off-by: Sage Weil <sage@newdream.net>
2010-05-26 07:46:24 +08:00
mode |= CEPH_FILE_MODE_LAZY;
ceph: on-wire types These headers describe the types used to exchange messages between the Ceph client and various servers. All types are little-endian and packed. These headers are shared between the kernel and userspace, so all types are in terms of e.g. __u32. Additionally, we define a few magic values to identify the current version of the protocol(s) in use, so that discrepancies to be detected on mount. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-07 02:31:06 +08:00
#endif
ceph: request FILE_LAZYIO cap when LAZY file mode is set Also clean up the file flags -> file mode -> wanted caps functions while we're at it. This resyncs this file with userspace. Signed-off-by: Sage Weil <sage@newdream.net>
2010-05-26 07:46:24 +08:00
return mode;
ceph: on-wire types These headers describe the types used to exchange messages between the Ceph client and various servers. All types are little-endian and packed. These headers are shared between the kernel and userspace, so all types are in terms of e.g. __u32. Additionally, we define a few magic values to identify the current version of the protocol(s) in use, so that discrepancies to be detected on mount. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-07 02:31:06 +08:00
}
ceph: factor out libceph from Ceph file system This factors out protocol and low-level storage parts of ceph into a separate libceph module living in net/ceph and include/linux/ceph. This is mostly a matter of moving files around. However, a few key pieces of the interface change as well: - ceph_client becomes ceph_fs_client and ceph_client, where the latter captures the mon and osd clients, and the fs_client gets the mds client and file system specific pieces. - Mount option parsing and debugfs setup is correspondingly broken into two pieces. - The mon client gets a generic handler callback for otherwise unknown messages (mds map, in this case). - The basic supported/required feature bits can be expanded (and are by ceph_fs_client). No functional change, aside from some subtle error handling cases that got cleaned up in the refactoring process. Signed-off-by: Sage Weil <sage@newdream.net>
2010-04-07 06:14:15 +08:00
EXPORT_SYMBOL(ceph_flags_to_mode);
ceph: on-wire types These headers describe the types used to exchange messages between the Ceph client and various servers. All types are little-endian and packed. These headers are shared between the kernel and userspace, so all types are in terms of e.g. __u32. Additionally, we define a few magic values to identify the current version of the protocol(s) in use, so that discrepancies to be detected on mount. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-07 02:31:06 +08:00
int ceph_caps_for_mode(int mode)
{
ceph: request FILE_LAZYIO cap when LAZY file mode is set Also clean up the file flags -> file mode -> wanted caps functions while we're at it. This resyncs this file with userspace. Signed-off-by: Sage Weil <sage@newdream.net>
2010-05-26 07:46:24 +08:00
int caps = CEPH_CAP_PIN;
if (mode & CEPH_FILE_MODE_RD)
caps |= CEPH_CAP_FILE_SHARED |
ceph: on-wire types These headers describe the types used to exchange messages between the Ceph client and various servers. All types are little-endian and packed. These headers are shared between the kernel and userspace, so all types are in terms of e.g. __u32. Additionally, we define a few magic values to identify the current version of the protocol(s) in use, so that discrepancies to be detected on mount. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-07 02:31:06 +08:00
CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE;
ceph: request FILE_LAZYIO cap when LAZY file mode is set Also clean up the file flags -> file mode -> wanted caps functions while we're at it. This resyncs this file with userspace. Signed-off-by: Sage Weil <sage@newdream.net>
2010-05-26 07:46:24 +08:00
if (mode & CEPH_FILE_MODE_WR)
caps |= CEPH_CAP_FILE_EXCL |
ceph: on-wire types These headers describe the types used to exchange messages between the Ceph client and various servers. All types are little-endian and packed. These headers are shared between the kernel and userspace, so all types are in terms of e.g. __u32. Additionally, we define a few magic values to identify the current version of the protocol(s) in use, so that discrepancies to be detected on mount. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-07 02:31:06 +08:00
CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER |
CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL |
CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL;
ceph: request FILE_LAZYIO cap when LAZY file mode is set Also clean up the file flags -> file mode -> wanted caps functions while we're at it. This resyncs this file with userspace. Signed-off-by: Sage Weil <sage@newdream.net>
2010-05-26 07:46:24 +08:00
if (mode & CEPH_FILE_MODE_LAZY)
caps |= CEPH_CAP_FILE_LAZYIO;
return caps;
ceph: on-wire types These headers describe the types used to exchange messages between the Ceph client and various servers. All types are little-endian and packed. These headers are shared between the kernel and userspace, so all types are in terms of e.g. __u32. Additionally, we define a few magic values to identify the current version of the protocol(s) in use, so that discrepancies to be detected on mount. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-07 02:31:06 +08:00
}
ceph: factor out libceph from Ceph file system This factors out protocol and low-level storage parts of ceph into a separate libceph module living in net/ceph and include/linux/ceph. This is mostly a matter of moving files around. However, a few key pieces of the interface change as well: - ceph_client becomes ceph_fs_client and ceph_client, where the latter captures the mon and osd clients, and the fs_client gets the mds client and file system specific pieces. - Mount option parsing and debugfs setup is correspondingly broken into two pieces. - The mon client gets a generic handler callback for otherwise unknown messages (mds map, in this case). - The basic supported/required feature bits can be expanded (and are by ceph_fs_client). No functional change, aside from some subtle error handling cases that got cleaned up in the refactoring process. Signed-off-by: Sage Weil <sage@newdream.net>
2010-04-07 06:14:15 +08:00
EXPORT_SYMBOL(ceph_caps_for_mode);